Meridian 565 Digital Surround Processor
Sales and service in the UK
Meridian Audio Ltd
Stonehill
Sales and service in the USA
Stukeley Meadows
Cambs
PE18 6ED
Meridian America Inc
3800 Camp Creek Parkway
Building 2400
Designed and
manufactured in the UK by
England
Tel (01480) 52144
Suite 122
Fax (01480) 459934
Atlanta
Digital Gramophone and Wireless Ltd
GA 30331
Stonehill
Stukeley Meadows
Cambs
World Wide Web
Tel (404) 344 7111
Fax (404) 346 7111
PE18 6ED
Part no: 565I/3
England
Copyright © 1995–1998 Digital Gramophone and Wireless Ltd.
trademark of Digital Theatre Systems Inc. MPEG is a registered
trademark of the MPEG organisation. Ambisonic is a registered
trademark of Nimbus Records Ltd. Trifield is a trademark of Trifield
Productions Ltd. LaserDisc is a trademark of Pioneer Electric Corp.
Boothroyd|Stuart Meridian, Meridian, Meridian Digital Theatre, MLP, and
LipSync are registered trademarks of Meridian Audio Ltd.
Manufactured under license from Dolby Laboratories Licensing
Corporation (Canadian patent 1,037,877), Lucasfilm Ltd. (US patents
5,043,970; 5,189,703; 5,222,059), Trifield Productions Ltd, and Nimbus
Records Ltd.
Dolby, Pro Logic, AC-3, and the double-D symbol are trademarks of
Dolby Laboratories Licensing Corporation. Lucasfilm, THX, and THX
Cinema are registered trademarks of Lucasfilm Ltd. DTS is a registered
This guide was produced by Human-Computer Interface Ltd, Cambridge,
England.
ii
Contents
Introduction
1
Introduces the digital surround processor,
and gives guidelines and suggested
layouts to help you plan your surround
system.
Setting up the digital
surround processor
7
Describes how to unpack and install the
digital surround processor, and gives
details of the video and speaker
connections.
Configuring the digital
surround processor
Planning a system ..................................
Planning sources ...................................
2
19
6
Describes how to configure the digital
surround processor for the speaker
arrangement you want to use.
Unpacking ..............................................
Connecting the digital surround
8
processor ............................................... 9
Connecting video ................................... 12
Connecting speakers ............................. 13
Connecting sources ............................... 15
Connecting to other Meridian
Choosing standard settings ................... 20
Specifying the speaker layout ................ 22
Speaker layouts ..................................... 24
Setting up the speaker outputs ............. 28
equipment .............................................. 18
iii
Calibrating the system 33
Explains how to use the digital surround
processor’s built-in calibration procedure
and test signals to set up your system for
the best possible sound.
Setting up sources
45
Explains how to set up the sources
Using the calibration procedure ............ 34 connected to your digital surround
Troubleshooting
53
Calibration tests ..................................... 36 processor and configure them to suit your
Test signals ............................................ 44 other equipment.
Provides suggested solutions to typical
problems.
Standard source settings ....................... 46
Examples of configuring the
General operating problems .................. 54
Audio problems...................................... 55
Video problems ...................................... 58
sources .................................................. 50
Index ...................................................... 59
iv
Introduction
The Meridian 565 Digital Surround Processor is unique in being the first
completely digital surround-sound processor, and it defines the standard
for both music and cinema performance. To achieve this we have
combined the latest techniques in high-precision analogue electronics and
digital signal processing with a careful analysis of all types of recorded
music. The result is a system that produces impressively realistic and
exciting reproduction of music and cinema sound with support for all the
current two-channel and multi-channel audio formats. These include PCM,
Dolby Digital (AC-3), DTS, and MPEG, as well as support for several
proprietary processing modes. MLP (Meridian Lossless Packing) format is
also available as an optional extra.
This Installation Guide explains how to set up the digital surround
processor to give the best results with a wide variety of different system
configurations. Once you have set up the 565, or if it has been set up for
you by your dealer, refer to the Meridian 565 Digital Surround Processor
User Guide for information about using the 565, and getting superb results
from all your music and cinema recordings.
Planning a system
Before unpacking and setting up your digital surround processor
it is worth spending a little time planning how to set up the
speakers, and the other components of your hi-fi system, so that
they will give the best results when used in conjunction with the
565.
Three-channel surround system
(Layout G or L, No Surrounds)
The digital surround processor can be configured to work with a
wide range of different speaker layouts. These include
combinations of a centre speaker, up to four surround speakers,
and up to three subwoofers, with the main left and right
speakers.
Adding a centre speaker is the most significant step you can
take to upgrade a two-speaker system, whether you are using
the system for cinema, music, or a combination of the two. It
reinforces the central image, and allows the left and right
speakers to be further apart for a wider soundstage. This gives a
more realistic and stable three-dimensional image of the original
recorded sound, for outstanding music and cinema
reproduction.
The following pages show some of the speaker layouts
particularly recommended for use with the digital surround
processor. For more information about these and the other
layout options see Specifying the speaker layout, page 22.
When you are playing a 5.1 source the digital surround
processor will choose the appropriate decoding for the layout
you are using.
The centre speaker needs to be of equivalent quality, and tonally
matched, to the main left and right speakers. It should also have
good power handling as it regularly plays louder than the left
and right speakers. The ideal position is at the same height as
the left and right speakers, and above the TV in a home cinema
system.
2
Four-channel surround system
(Layout M, 2 Surrounds)
Five-channel surround system
(Layout G, 2 Surrounds)
If you are primarily interested in home cinema you may prefer to
extend an existing stereo system by adding a pair of rear
surround speakers, for cinema effects and ambient sounds.
Our recommended surround system for music and cinema uses
five speakers, with the main left and right speakers providing the
bass. This gives a very natural sound for music listening, and a
precise three-dimensional image combined with good bass
performance for cinema.
For cinema the surround speakers do not take a huge strain, so
small units can be used such as in-wall or bookshelf-mounted
speakers. For 5.1 or Ambisonic reproduction, the rear speakers
should be capable of reproducing the full frequency range, and
should ideally be the same as the front speakers.
If you also have a mono subwoofer available you can choose to
use this for the cinema presets, to enhance cinema effects
without affecting the quality of music from your system (Layout
AG). This is a good compromise if your primary interest is music,
and you want the benefit of enhanced bass performance for films.
Alternatively, you can choose to use the subwoofer for the Dolby
Digital LFE channel; see To select a 5.1 LFE subwoofer,
page 27.
3
THX system (Layout A)
Seven-channel surround system
(Layout G, 4 Surrounds)
If your primary interest is cinema, you can use a mono
subwoofer to enhance the bass performance for both cinema
and music presets.
The digital surround processor allows you to add side surround
speakers, to enhance the effect of the rear surrounds in home
cinema reproduction. This gives a more realistic portrayal of
special effects, such as a plane flying overhead from front to
back.
This is the configuration recommended by Dolby and THX for
use with Pro Logic, and is a good choice if you want to enhance
the bass from the main left and right speakers, or your room is
large.
For music reproduction, and in particular music using Ambisonic
encoding, the side surrounds allow an even more faithful
recreation of the original sound field.
The side surround speakers should be positioned on the side
walls level with the listening position.
If your main speakers have a limited bass response you can
benefit from a mono subwoofer (Layout A, 4 Surrounds).
4
Surround system with full-range
speakers (Layout L)
Using the 565 with Meridian DSP
Loudspeakers
Meridian systems will often contain two or more units that can
be controlled by the Meridian System Remote infra-red remote
control. The Meridian 500 Series avoids conflicts in such a
situation by designating one of the units as the controller for the
system, and making all the other units receive their instructions
from the controller via a special communications cable.
If your surround installation includes one or more Meridian DSP
Loudspeakers, such as the DSP5000, DSP5500, or DSP6000,
we recommend you make one of the digital speakers the
controller for the system. This way you will be able to give
commands to all the 500 Series units connected to the system
simply by pointing the Meridian System Remote at the specified
speaker. Generally you would choose the speaker that has the
best infra-red path from the listening position, typically the
centre speaker.
A system designed for very serious music listening should use
five or seven full-range speakers, with good bass performance,
to recreate the original low frequency ambience and give the
correct energy balance at low frequencies.
A recommended configuration, for the ultimate in music and
cinema surround sound, consists of two Meridian DSP6000
Digital Loudspeakers, a DSP6000C Digital Centre Loudspeaker,
and four DSP5000 or DSP5500 Digital Loudspeakers.
5
Planning sources
The 565 provides three audio inputs: analogue, digital-cable,
and digital-optical. These inputs will allow you to set up a
surround system with the following sources, without the need for
an additional preamplifier:
Using an analogue preamplifier
Alternatively, the 565 can be used in conjunction with an
analogue preamplifier, such as the 501 or 501V Control Unit,
connected to the 565 analogue input. In this case digital
sources, such as a LaserDisc or CD, should be connected
directly to the appropriate 565 digital inputs. The 501 and 501V
Control Units allow up to six analogue sources to be connected
to the 565, each with adjustable sensitivity.
❍ CD or DVD connected to the digital-cable input.
❍ TV connected to the analogue input.
❍ LaserDisc, connected to the digital-optical input.
Using a Digital Control Unit
Using a LaserDisc player
For greatest flexibility, and optimal performance, the 565 should
be used in conjunction with the Meridian 562 or 562V Digital
Control Unit. In this case all the source selection and switching
is performed by the Digital Control Unit. The 562 and 562V
Digital Control Units provide an on-board analogue to digital
converter, allowing up to seven analogue sources to be
connected to the 565, each with adjustable sensitivity,
combined with up to seven digital sources to provide a pure
digital feed to the 565.
Some early LaserDiscs are recorded with analogue soundtracks,
or provide different information on the analogue and digital
soundtracks, so to take advantage of these you will need to
connect a LaserDisc player to both a digital and an analogue
input.
If you have a 7.1 version of the 565 you can take advantage of
Dolby Digital LaserDiscs by connecting the LaserDisc player to
the 565 via a 519 Demodulator; see To connect to a 519
Demodulator, page 15.
6
Setting up the digital
surround processor
This chapter explains how to install the digital surround processor. It
describes what you should find when you unpack the processor, how you
should connect it to your other audio equipment and speakers, and the
siting constraints.
Before you begin installation you should ensure that your digital surround
processor is the correct voltage for you local AC supply. If it is not, do not
try to install the unit, and contact your dealer.
You should not make any connections to the digital surround processor,
or to any other component in your system, while the AC power supply is
connected and switched on.
Unpacking
The digital surround processor comes in a box containing the
following components:
❍ Near strong magnetic radiation, such as a near a power
amplifier.
❍ Near to a television, or where connecting cables may be
subject to or cause interference.
❍ Meridian 565 Digital Surround Processor.
❍ Power cord.
❍ 500 Series communications lead.
❍ Digital-audio cable.
To avoid overheating ensure that air can flow through the
cooling slots on the base and rear panel.
❍ This manual.
❍ The Meridian 565 Digital Surround Processor User Guide.
Radio interference
If any of these items are missing please contact your dealer. We
suggest that you retain the packing in case you need to
transport the unit.
FCC Warning: This equipment generates and can radiate radio
frequency energy and if not installed and used correctly in
accordance with our instructions may cause interference to
radio communications or radio and television reception. It has
been type-tested and complies with the limits set out in Subpart
J, Part 15 of FCC rules for a Class B computing device. These
limits are intended to provide reasonable protection against
such interference in home installations.
To position the digital surround
processor
Do not place the digital surround processor:
❍ In direct sunlight.
EEC: This product has been designed and type-tested to
❍ Near heat sources, such as a radiator.
❍ Directly on top of heat producing equipment, such as a power
amplifier.
comply with the limits set out in EN55013 and EN55020.
8
Connecting the digital surround processor
Rear panel
RS232
connection
Analogue
outputs 5 – 8
S-Lead
connections
Analogue
outputs 1 – 4
Analogue
inputs
REAR-L SIDE-L/SUB
CENTRE MAIN-L
S-LEADS
OFF
7
8
5
3
4
1
2
L
6
R
REAR-R SIDE-R/SUB
SUB
OUT
MAIN-R
ANALOGUE
INPUT
REARS SIDES CENTRE
MAIN
1 – 2
RS232
/SUB
/SUB
IN
DIGITAL
IN
DIGITAL
BYPASS
OPTICAL
IN
7 – 8
5 – 6
3 – 4
COMMS
DIGITAL OUTPUTS
C-VIDEO
Digital
input
Optical
input
Digital
outputs
Composite video
connections
Comms
Video connections
Use this connection
To connect to this
C-VIDEO IN
The composite video output
from a video recorder or
The table opposite gives details of the two video connections.
LaserDisc player, 562V, or 501V.
To take advantage of the on-screen display both these
connections must be made.
C-VIDEO OUT
The composite video input of a
television or monitor.
9
Audio inputs
Audio outputs
The following table gives details of the three audio inputs:
The following table gives details of the analogue and digital
outputs:
Use this input
To connect to this
Use this output
MAIN 1-2
To connect to this
ANALOGUE INPUT
L and R
An analogue source such as a TV,
video recorder, radio tuner, or
analogue preamplifier.
Main left and right speakers.
CENTRE/SUB 3-4
Centre speaker and centre or mono
subwoofer.
DIGITAL IN
OPTICAL IN
A digital source, such as the 562 or
562V Digital Control Unit, or a CD
player.
SIDES/SUB 5-6
REARS 7-8
Left and right subwoofers, or side left
and side right surround speakers.
A digital-optical source, such as a
LaserDisc player, the 519
Left and right rear surround speakers.
Demodulator, or a CD player with no
digital-cable output.
To use a Meridian DSP Loudspeaker in a particular position
connect it to the appropriate digital output.
To use an analogue speaker, in conjunction with a suitable
power amplifier, connect the input of the power amplifier to the
appropriate analogue output.
10
You specify whether you are using the digital or analogue output
for each channel in the Speaker Set configuration option; see
Setting up the speaker outputs, page 28. Note that you should
always leave the unused analogue or digital output for each
channel unconnected.
Communications connections
The following table gives details of the communications
connections:
Use this connection
To connect to this
The analogue connections should be made using high-quality
screened cable, taking care to connect the left and right
channels correctly.
COMMS
Other Meridian 500 Series
equipment, and the master
digital speaker.
The digital connections should be made with high-quality 75Ω
screened cable. Suitable cables are available from Meridian. We
do not recommend using analogue audio cables, which do not
have adequate shielding or the correct impedance, or cables
intended for UHF applications, as these do not provide
adequate shielding in the 1–30MHz region.
S-LEADS
To distribute the S-lead
connections from the master
digital speaker to other slave
digital speakers.
RS232 connection
Optical connections should be made using a suitable optical
fibre supplied by your dealer.
The RS232 connection is for future expansion, to allow the 565
to be interfaced to a computer. Contact your dealer for more
information.
11
Connecting video
On-screen display
Television
MONITOR
IN
565 Digital Surround Processor
LaserDisc
VIDEO OUT
OUT
C-VIDEO
IN
Video lead
If your surround system includes a television the 565 can add a
text overlay to the video signal, to provide additional information
about its operation in the form of a textual on-screen display
(OSD). In normal operation this repeats the information provided
on the 565 front panel display. During calibration the on-screen
display provides additional guidelines to help you perform the
calibration sequence.
The on-screen display automatically locks to an NTSC, PAL, or
SECAM signal, and requires an input signal to operate. The
video circuits in the 565 are of broadcast quality, and passing
the video signal through the digital surround processor will not
affect its quality.
12
Connecting speakers
To connect to Meridian DSP
Loudspeakers (eg DSP5000)
● If your system includes more than two Meridian DSP
Loudspeakers, use an S5 lead to bring back the COMMS
output from the master digital speaker, and connect it to one
of the S-LEAD sockets on the 565.
DSP5000C
Centre (master)
● Link all the other digital speakers together using S5 leads, as
shown in the illustration. The other S-LEAD sockets on the
back of the 565 can be used to distribute the comms to each
slave speaker.
INPUT
COMMS
OUTPUT
565 Digital Surround Processor
DIGITAL
OUTPUT
S5 lead (digital unused)
1
S-LEADS
DIGITAL
INPUTS
M5 lead
Use the duplicate sockets on each digital speaker to link the
speakers together in pairs, corresponding to the pairs of
channels on the digital outputs.
2
COMMS
DIGITAL OUTPUTS
S5 lead
DSP5000 – Main R
DSP5000 – Main L
DIGITAL INPUTS DIGITAL
COMMS
DIGITAL INPUTS DIGITAL
COMMS
To connect to Meridian Active
Loudspeakers
OUTPUT OUTPUT INPUT
OUTPUT OUTPUT INPUT
2
1
2
1
S5 lead
● Connect the appropriate outputs from the digital surround
processor to the speaker inputs, using screened audio cable.
● Use the comms part of an M5 lead to connect one of the
COMMS sockets on the 565 to the digital speaker you have
chosen as the master (typically the centre speaker).
● Use the audio part of the M5 lead to connect the digital
speaker to the appropriate 565 digital output.
13
To connect to a 556 or 557 Stereo
Power Amplifier or other power
amplifier
To connect an M2500 Active
Subwoofer
565 Digital Surround Processor
Subwoofer
565 Digital Surround Processor
556 Stereo Power Amplifier
DIRECT
INPUT
CROSSOVER
INPUT
SUB
MAIN-L
INPUT
INPUT
MAIN-R
Audio lead
Audio lead
● Connect the SUB output from the digital surround processor
● Connect the appropriate outputs from the digital surround
processor to the power amplifier line inputs, using screened
audio cable.
to the subwoofer’s line level input.
The digital surround processor provides very high-quality
crossovers for the subwoofer. For best results you should
remove or disable any crossover in the subwoofer, and set the
digital surround processor to Sub Narrow. If you cannot bypass
the subwoofer crossover set it to its highest setting (eg 200Hz),
or set the digital surround processor to Sub Wide to switch off
the digital surround processor’s crossover. For more information
see Setting up the speaker outputs, page 28.
● Connect the speaker outputs from the power amplifier to
suitable speakers.
If you are using an M2500 use the L+ input and configure it for
Bypass and Maximum gain; refer to the M2500 user guide for
more information.
14
Connecting sources
To use the digital surround processor
as a preamplifier
To connect to a 519 Demodulator
565 Digital Surround Processor
LaserDisc
You can connect one analogue, one digital, and one optical
source to the 565 without needing a separate preamplifier.
OPTICAL
INPUT
RF
OPTICAL
OUTPUT OUTPUT
519 Demodulator
508•24 24-Bit CD Player
504 FM Tuner
RF
Optical
OPTICAL OPTICAL
OUTPUT INPUT
RF
INPUT
cable cable
OUTPUT
DIGITAL
OUT
Optical cable
565 Digital Surround Processor
Audio
lead
Digital
lead
ANALOGUE
INPUT
● Connect the RF output from the LaserDisc player to the 519
DIGITAL OPTICAL
IN
IN
RF input.
● Connect the optical output from the LaserDisc player to the
LaserDisc player
519 optical input.
Optical
lead
OPTICAL
OUT
● Connect the 519 output to the 565 OPTICAL IN using an
optical cable.
● Connect the analogue source to the 565 ANALOGUE INPUT
If you are using the 565 with a 562/562V Digital Control Unit
connect the 519 to the 562/562V optical input, instead of to
the 565.
using a standard phono cable.
● Connect the digital source to the 565 DIGITAL IN socket,
using a high-quality digital phono cable.
● Connect the optical source to the 565 OPTICAL IN, using an
15
optical cable.
To connect to a 562 or 562V Digital
Control Unit
To connect to a 501 or 501V Control
Unit or other preamplifier
565 Digital Surround Processor
562 Digital Control Unit
565 Digital Surround Processor
501 Control Unit
ANALOGUE
INPUT
MAIN OUT AUDIO INPUTS
DIGITAL
IN
DIGITAL
OUT MAIN
DIGITAL OPTICAL
IN
IN
Up to 8 analogue, 5 digital,
and 2 optical sources.
Digital input Optical input
eg CD player eg LaserDisc
Up to 6 analogue
inputs
Digital lead
● Connect the main digital output of the 562 or 562V to the 565
● Connect the main analogue output of the preamplifier to the
DIGITAL IN, using high-quality 75Ω screened cable.
565 ANALOGUE INPUT, using high-quality screened cable.
● Connect all the analogue and digital sources you want to use
● Connect analogue sources to the preamplifier.
to the appropriate inputs of the 562 or 562V.
● In addition, connect any digital and optical source directly to
● Configure the 562 to Type 1.
the 565.
● Configure each 562 or 562V source as required; refer to the
For example, if your CD player provides both an analogue output
and digital output, you will get better performance by connecting
the digital output directly to the 565.
562/562V User Guide for more information.
● Configure the 565 to a 562 Type option; see 565 standard
settings, page 21.
● If you are using a 501/501V configure it to Type 1 and set the
volume control option to Fout (fixed output).
16
To use the digital surround processor
with a 551 Integrated Amplifier
The 551 Integrated Amplifier provides an ideal companion to the
digital surround processor because its preamplifier section can
be used to supply up to five analogue sources, with the power
amplifier section used to drive one pair of speakers.
565 Digital Surround Processor
551 Integrated Amplifier
SURR ANALOGUE
TAPE OUT A4 IN AUDIO INPUTS
INPUT
DIGITAL OPTICAL
IN IN
7
8
Up to 5 analogue
Digital input Optical input
eg CD player eg LaserDisc
Audio leads
inputs
● Connect the 551 tape output to the 565 ANALOGUE INPUT,
using a pair of phono leads.
● Connect the two analogue outputs from the 565 that you want
to use to the tape input (A4) of the 551.
● Connect one digital input, such as CD, and one optical input,
such as LaserDisc, directly to the 565.
● Configure the 551 to Type 9.
17
Connecting to other Meridian equipment
To connect to other Meridian 500
Series equipment
One unit will then be designated
as the controller, and display:
Controller
● Connect one of the COMMS sockets on the back panel of the
digital surround processor to one of the COMMS sockets on
another 500 Series unit, using the 500 comms lead provided
with the 565 Digital Surround Processor.
This is the unit that will respond to the remote.
All the other units will be configured
Not Con.
as non-controllers, and display:
The sequence in which you connect the units is not important.
Your system is now set up and ready for use.
586 DVD Player
500 Series unit
● If for any reason the automatic setup does not give the
configuration you want, restore the default operation by
selecting one of the standard types; see Choosing standard
settings, page 20.
COMMS
COMMS
Note: Do not, under any circumstances, connect any equipment
other than Meridian 500, 600, or 200 Series to the socket
marked COMMS on the back of the DVD player.
Then configure the units with the following automatic setup
procedure:
● Switch all the units to standby.
● Press CLEAR (remote).
Auto Setup
Each unit will display:
18
Configuring the digital
surround processor
This chapter explains how to configure the digital surround processor to
suit the speaker arrangement you want to use, and the other equipment in
your system.
The first stage in configuring the digital surround processor is to choose
one of the standard Type settings, which are designed to set most of the
parameters to typical values.
The next stage is to configure the 565 for those aspects of your layout that
differ from the standard setting you chose.
The third stage is then to set up the speaker outputs, and adjust the delay
of each output to time-align the system. These three stages are described
in detail in the following sections.
Choosing standard settings
The digital surround processor provides 12 alternative standard
settings, called Types, which configure all aspects of the 565
into the six most commonly needed configurations.
To select a standard setting
● Switch off any power amplifiers that are connected to the 565
and put any digital speakers to standby.
Choosing one of the 12 standard settings overrides any other
configuration you may have performed, and so can be used to
reset the configuration of the unit.
● Switch off the 565, using the power switch on the back panel.
● Switch on the power again while holding down the Off key on
the front panel.
The Type you choose depends on the following aspects of your
system:
Type 1
After a short delay the display will show:
❍ Whether you are using the digital surround processor on its
own, or in conjunction with a 562/562V Digital Control Unit.
❍ Whether one or more Meridian DSP Loudspeakers are
included in the system.
● Press ▲ or ▼ on the front panel to change the Type number.
For example, if you select Type 3 the
Type 3
display shows:
❍ Whether you are using the earlier Meridian 200 Series units.
● Wait for one second, and then switch off the 565 using the
The Type you should choose is shown in the table on the
opposite page.
power switch on the back panel.
● Switch on again to use the standard settings you have
selected.
Note that you cannot use the digital surround processor with the
Meridian 601, or with both 200 Series units and a Meridian DSP
Loudspeaker.
20
565 standard settings
A second set of six types, referred to as Type 0 562 to Type 5
562, are identical to Type 0 to 5 but configure all the sources
to use the 565 digital input. These are intended for use with a
562/562V Digital Control Unit.
The following table shows the options configured by Types 0 to
5 on the digital surround processor:
If none of the standard settings exactly matches your
requirements choose the one that is closest, and then make the
necessary changes to the appropriate parameters as described
in the following sections of this chapter.
Type
Speakers
Mode
500
0
1
2
3
4
All analogue (Layout AG)
All analogue (Layout A)
All analogue (Layout A)
All Meridian DSP (Layout G)
500
200
500
Meridian DSP L, R, and Centre,
analogue surrounds (Layout G)
500
5
Meridian DSP centre,
500
otherwise analogue (Layout A)
Types 0 to 5 configure all the sources, except for CD, CDR, and
LD, to use the 565 analogue input. These are ideal for using the
565 on its own or with an analogue preamplifier, such as the
501/501V Control Unit.
21
Specifying the speaker layout
When you reset the digital surround processor to one of the
standard settings an appropriate speaker layout is selected
based on the Type number you have chosen, as shown on the
previous page.
How to use the table of speaker
layouts
Choose the appropriate row in the table depending on the size
of your main speakers, the size of your centre speaker (if
present), and the way you want to use any subwoofers in your
system.
In most cases you will then need to set the speaker layout
explicitly, according to the particular arrangement of speakers in
your system.
Each entry shows the size or position of the corresponding
speaker(s), followed in brackets by the number of the 565 output
they should be connected to.
The speaker layout determines:
❍ How the eight analogue or digital outputs are assigned to the
different speakers in the layout.
Large main speakers
❍ Whether the bass is to be handled by the main speakers, or
by one or more subwoofers.
If your main left and right speakers are large, with good bass
performance, and you want to use them for full range
reproduction, choose one of the layouts in the upper half of the
table. We recommend these options for Meridian DSP
loudspeakers.
The digital surround processor provides 15 alternative layouts,
identified by a single letter A–N and the pairs AB and AG.
The table on the next page shows the complete set of alternative
layouts, and you may find it useful to choose the appropriate
layout from these tables in conjunction with the illustrations in
the section Planning a system, page 2.
Then select the appropriate section of the table depending on
whether you have no centre speaker, a small centre speaker
(eg DSP5000C), or a large centre speaker (eg DSP5500C).
22
If you have a subwoofer you can use it to augment the bass
from the centre channel (Layouts B or H). If the subwoofer is not
very high quality we recommend using it only for the cinema
presets, and not for music (Layouts AB or AG).
Surrounds
All the layouts allow you to add up to two rear surrounds. If you
do not have rear surrounds, set No Surrounds in Config. If you
have only one rear surround connect it to output 8 and set 1
Surround in Config.
With Dolby Digital sources an additional option is to use the
subwoofer for the LFE channel.
Many of the layouts also allow you to add up to two side
surrounds. To use side surrounds in a layout that supports them
set 4 Surrounds in Config. For more information see To specify
the number of surround speakers, page 26.
Small main speakers
If your main left and right speakers are small and do not have a
good bass response, or your room is large, you can use one or
more subwoofers to handle the bass for the system by selecting
one of the layouts in the lower half of the table.
All the layouts include at least one subwoofer. If there is only
one subwoofer this provides mono bass for all the channels.
If you have two subwoofers you have a choice of using them for
mono and surround (Layout J), left and right (Layout K), or
left+right and centre (Layout F).
23
Speaker layouts
Main
Centre
Subwoofers
None
Sides
Rear
Layout
None
Optional (5, 6)
Optional (5, 6)
Optional (5, 6)
Optional (5, 6)
Optional (5, 6)
No
Optional (7, 8)
Optional (7, 8)
Optional (7, 8)
Optional (7, 8)
Optional (7, 8)
Optional (7, 8)
Optional (7, 8)
Optional (7, 8)
Optional (7, 8)
Optional (7, 8)
Optional (7, 8)
Optional (7, 8)
Optional (7, 8)
Optional (7, 8)
M
G
B
None
Centre (4)
Large (1, 2)
Small (3)
Centre (4) cinema presets only
Mono (4) cinema presets only
Centre (4), Surround (5)
None
AB
AG
H
L
Optional (5, 6)
Optional (5, 6)
Optional (5, 6)
No
Large (3)
None
Mono (4)
N
D
C
A
Mono (4)
Left (5), Right (6)
Mono (4)
Optional (5, 6)
No
Small (1, 2)
Mono (4), Surround (5)
Left (5), Right (6)
Centre (4), Left (5), Right (6)
J
Small (3)
No
K
No
E
24
To set the speaker layout
To define the shape of the speaker
layout
● Switch off the 565, using the power switch on the back panel.
In some of the DSP programmes the digital surround processor
makes use of information about the shape of your speaker
layout, or aspect ratio.
● Switch off any power amplifiers that are connected to the 565.
● Switch on the power again while holding down the Display
key on the front panel.
Aspect 1
● Press > or < until you see the display:
Config
The display will show:
● Measure the distances between the speakers in your room
and calculate the aspect ratio, as follows:
● Press > or < until you see the
Layout A
display:
centre - surround depth
aspect ratio =
left - right width
● Press A or V to step between the alternative layout options.
When you have chosen the layout you want to use proceed to
the next step.
2
1.4
1
.71
.5
● Use the A and V keys to select the nearest aspect ratio.
If your layout has an aspect ratio greater than 2 or less than 0.5
you should consider changing the speaker positions for
optimum sound.
25
To specify the number of surround
speakers
To specify the type of the surround
speakers
● Press > or < until you see a display
● Press > or < until you see a display
2 Surrounds
Rears Small
such as:
such as:
● Press A or V to step between the following options:
● Press A or V to select Small if the rear surround speakers
have limited bass handling (eg bookshelf speakers), or Large if
they have full bass handling (eg Meridian DSP loudspeakers).
Option
What it means
If you have side surround speakers, an additional Side option
allows you to set the type of side speakers in the same way.
No Surrounds
No rear speakers.
One centre rear speaker (should be
connected to REAR-R).
1 Surround
2 Surrounds
4 Surrounds
L and R surround speakers; eg a
THX system.
L and R rear and side speakers.
26
To select a 5.1 LFE subwoofer
Option
Initial value
Xover 84Hz
If you have the 7.1 version of the 565 you can add an LFE
subwoofer to layouts that do not normally have one (such as G,
L, or M), or choose an LFE subwoofer instead of a mono
subwoofer in layouts that have a subwoofer (such as A).
Crossover frequency
24 Bit? Y
500 Comms
24 Bit Upgrade
Communications mode (500 Comms
or 200 Comms)
● Press > or < until you see a
LFE 5.1 Sub
display such as:
Controller mode (Auto Setup,
Controller, or Not Con.)
Auto Setup
● Press A or V to change the 5.1 Sub option.
With layouts with no subwoofer the choice is between No 5.1
Sub or LFE 5.1 Sub. For layouts with one or more subwoofers
you can choose between Mono 5.1 Sub, to give a standard THX
80Hz crossover, or LFE 5.1 Sub, to give an 120Hz crossover.
Sys.Addr. =1
Prod.Addr.=1
Main Volume
FP Volume? N
System address (1–8)
Product address (1–8)
To set other configuration options
Volume mode (Main Volume or
2nd Volume)
The other configuration options are generally set to an
appropriate value when you reset the 565 to one of the standard
settings, and you should not normally need to alter them; see
Choosing standard settings, page 20.
Front panel volume (N or Y)
These options are summarised in the table opposite for
advanced use:
27
Setting up the speaker outputs
The next stage in configuring the 565 is to specify information
Left
Sub
Centre
Right
about each of the speakers in your layout, and adjust their
delays to time-align the system so that sounds are coincident
when they arrive at the listening position.
To time-align the system
Before setting up the speaker outputs you need to measure the
distance, in cm or inches, to each speaker from the listening
position.
Left
Right
Side
Side
● As you measure each distance, write it against the
appropriate line in the diagram opposite (or a copy of it).
Measure from the ear height at the listening position to the
tweeter on each speaker (where applicable).
Surround Sub
Left Rear
Right Rear
Then decide which speaker is furthest from the listening
position; this distance is referred to as furthest below.
28
To set up a speaker output
To change the settings for a speaker
● Switch off the 565, using the power switch on the back panel.
● Press Source until the name of the speaker output you want
to adjust appears.
● Switch off any power amplifiers that are connected to the 565.
1 Main Left
● Switch on the power again while holding down the Source
For example:
key on the front panel.
If the speaker output does not appear check that you have
chosen the correct layout; see Specifying the speaker layout,
page 22.
Speaker Set
The display will show:
1 Main Left
and then after a short delay:
To select the output type
● Press Source to step between the different speakers
● Press >until you see a display
1 Meridian
specified in the layout you have chosen.
such as:
● Change the settings for each speaker as described below.
The number specifies the number of the output, and
corresponds to the labelling on the analogue or digital outputs
on the back panel.
The option specifies the type of speaker you are using, and
whether you are using the analogue or digital output connection.
29
● Use A and Vto choose between the following options:
To set the output delay
Choose this
For this type of speaker
● Press >or <until you see a
1 Delay +0.0
display such as:
Meridian
A Meridian DSP Loudspeaker such as
the DSP5000, DSP5000C, DSP6000,
or DSP6000C connected to the
appropriate digital output.
● Using the diagram you completed at the start of this section,
calculate the correct delay as follows:
furthest - distance
For measurements in inches:
For measurements in cm:
delay =
delay =
Digital
A digital signal for feeding a DAC
directly from the appropriate digital
output.
12
furthest - distance
30
Analogue
A power amplifier or active speaker
connected to the appropriate analogue
output.
where distance is the distance to the speaker you are setting up,
and furthest is the distance to the furthest speaker.
For example, if the main left speaker is 120" (300cm) from the
listening position, and the furthest speaker is 180" (450cm)
away, set the delay for the main left speaker to +5.0.
Note that when you are setting up the furthest speaker its delay
should work out to be zero.
Repeat this for each of the speakers in your layout.
30
To set up speaker protection for 5.1
sources
Size of
drivers
1 bass
unit
2 bass
units
3 bass
units
6 inch
0
4
8
Because of the high bass levels that 5.1 channel sources are
capable of reproducing, the digital surround processor allows
you to set up automatic protection of each full-range speaker or
subwoofer in your system.
8 inch
4
10
14
20
26
14
18
24
30
10 inch
12 inch
15 inch
8
14
20
● Press > or < until you see a display
1 Size Max
such as:
● Press A or V to specify the volume of bass that the speaker
To specify the output precision
can withstand, according to the table opposite.
If you are using Meridian DSP Loudspeakers set the output
precision to 22 bits as follows:
A setting of Max corresponds to no protection, and 0
corresponds to full protection.
● Press > or < until you see a display
1 22 Bits
The following table gives suggested settings for different types
of speaker. Generally reflex or active speakers can take a higher
score. As a guideline, add 2 for a reflex design.
such as:
● Press A or V to set the value to 22 bits.
For Meridian DSP Loudspeakers set Size to Max.
31
To specify the type of subwoofer
The remaining parameters are set up automatically by the
calibration procedure described in the next chapter; see
Calibrating the system, page 33. They are summarised in the
following table for reference.
● Press > or < until you see a display
4 Narrow
such as:
● Press A or V to specify the subwoofer filtering. The options
Option
Initial value
are shown in the following table:
1 Phase +
Option
Description
Phase (+ or -)
Narrow
The digital surround processor
provides an 80Hz cutoff; the
subwoofer’s crossover should be
bypassed.
Gain (-18dB to +6dB for main
speakers, -12dB to +12dB for
subwoofers)
1 Gain +0
Note that Meridian speakers cannot go above 0dB.
Wide
The subwoofer includes a crossover.
32
Calibrating the system
To help you to set up your installation to give the best possible sound with
any particular combination of associated equipment the digital surround
processor includes a built-in calibration procedure.
This calibration procedure uses test signals to present a series of sounds,
which you use to adjust certain aspects of the system to their optimum
settings.
You should work through the calibration procedure the first time you set
up your surround sound system, and whenever you want to check the
calibration, such as after changing the layout of your room.
Using the calibration procedure
We recommend that you perform the calibration procedure
using the Meridian System Remote and from the listening
position.
Using a Sound Pressure Level meter
Although you can perform the calibration procedure by ear, it is
recommended that you perform the tests using a Sound
Pressure Level meter, available fairly cheaply from Tandy/Radio
Shack, or your Meridian dealer may be able to lend you one.
As you run the calibration procedure the name of each
calibration test is shown on the front panel display, followed by
the parameters adjusted in the test. The on-screen display also
provides additional text explaining what to do, and these
displays are reproduced in the following sections for reference.
For information about setting up the on-screen display refer to
Video connections, page 9.
Set the Sound Pressure Level meter to C weighted, and slow.
Take readings with the meter at the listening position, pointing
vertical. You should hold the meter with an outstretched arm to
minimise reflections from your body.
Each calibration test uses a test signal designed to give the best
results. For information about choosing an alternative test signal,
or one of the 565 inputs, see To select a different test signal,
page 44.
34
To start the calibration procedure
To exit from the calibration procedure
● Put the 565 into standby by pressing the Off key.
You can exit from the calibration procedure at any time, and any
parameters you have set will be retained.
● Press and hold the front panel Off key for at least five
seconds.
● Press Off on the front panel or Meridian System Remote.
To move between the calibration tests
● Press Store on the front panel or Meridian System Remote.
The calibration tests are described in the following sections.
Calibration
The display shows:
After a few seconds the display
shows:
Levels
Left +0dB
followed by:
Levels is the name of the first calibration test. For more detailed
information about this and the other calibration tests see the
following sections.
35
Calibration tests
Levels
● Use A and V to adjust the level of the speaker. Ignore any
tonal difference.
For correct THX reproduction you should adjust each speaker to
75dB SPL using an SPL meter. Even if your speakers are not
THX approved this setting is recommended.
Note that you cannot set the level of a subwoofer by ear,
because low-frequency noises sound quieter. To set the
subwoofer correctly either use an SPL meter, or set it by ear and
then reduce the subwoofer gain by 15dB to correct for human
hearing.
This test allows you to adjust the output level to each speaker
individually, and it follows the general guidelines from Dolby and
Lucasfilm. A Sound Pressure Level (SPL) meter can be useful at
this stage; ask your dealer for more information.
Digital or Meridian outputs cannot be set above 0dB. You will
therefore need to reduce the level of louder channels to match
them.
Left +0dB
● When you have completed the Levels section press Store to
After a short delay the display shows:
proceed to the next test.
● Use the ] and [ keys on the Meridian System Remote to
move between each of the speakers in the layout in the
sequence: left, centre, right, side right, surround right,
surround left, side left, and subwoofers.
36
Main
● Use A and V to change the phase.
Choose the correct setting as follows:
Setting
What it sounds like
Correct
A centrally focused sound image which
remains stable as you move your head.
Incorrect
An uncomfortable, phasey, diffused
image which appears to come from
behind you, and which changes
dramatically as you move your head.
This test allows you to set the relative phase and the relative
delay between the left and right main speakers.
Unless there is a wiring error in one of the speakers, or an
incorrect setting in Speaker Set, the correct setting should be
Phs +.
The Low test signal is now presented equally and in phase on
just the left and right main speakers; see Test signals, page 44,
for details of the signals.
You should not adjust the delay as this has already been
specified when you time-aligned the layout.
● Use > and < to switch between phase and delay.
● Press Store to proceed to the next calibration stage.
When setting phase the display shows the absolute phase of the
left speaker.
Left Phs +
For example:
37
Centre Phase
Choose the correct setting as follows:
Setting
What it sounds like
Correct
The centre speaker reinforces the
sound.
Incorrect
The sound from the centre cancels
some of the image formed by the left
and right speakers.
When setting the delay the display shows the relative
displacement, in feet, of the centre speaker.
As in the previous test, signals are applied to the main left, right,
and centre speakers to allow you to adjust the relative phase
and delay on the centre channel.
● Use A and V to adjust the delay.
Choose the correct setting as follows:
● Use > and < to switch between phase and delay.
Setting
What it sounds like
When setting phase the display shows the absolute phase of the
centre speaker.
Correct
The sound between the speakers is
very even, and does not change
radically as you move your head.
Centre Phs +
For example:
Incorrect
The sound appears diffused, and
changes in timbre and apparent
location as you move your head.
● Use A and V to change the phase.
38
As you increase the delay the centre speaker will appear to
move away from you. In practice we usually find that the ideal
delay setting is +0.5 more than the value used to time-align the
system.
This calibration test adjusts the relative phase between the front
speakers and the rear surround speakers.
Surr R Phs +
After a short delay the display shows:
For example, if the original value was
Centre +1.5'
+1.0' adjust it to:
● Use A and V to change the phase of the right surround
speaker.
This is equivalent to moving the centre speaker 1/2 foot further
away from the listener.
Choose the correct setting as follows:
You have now calibrated all the front speakers.
● Press Store to proceed to the next calibration test.
Front-Rear
Setting
What it sounds like
Correct
A focused central image between the
right front and rear speakers.
Incorrect
A diffuse, phasey image between the
two right speakers that changes as you
move your head.
This is a difficult setting to adjust, but is particularly important for
the Ambisonic and Super Stereo DSP modes.
● Press Store to proceed to the next calibration test.
39
Surround
Unless there is a fault in the wiring, the correct setting should be
the same phase as you set for the right surround speaker in the
previous calibration stage. Confirm that in this position there is a
more focused central image between the two surround
speakers, as for the Main test.
You should not adjust the delay as this has already been
specified when you time-aligned the layout.
If you have subwoofers or side surround speakers in your
system press Store to proceed to the next calibration stage;
otherwise you have completed the calibration of your speakers.
This test presents the Low test signal through the left and right
rear surround speakers to allow you to adjust the relative phase
and delay between them.
● Use > and < to switch between phase and delay.
When setting phase the display shows the absolute phase of the
left surround speaker.
Surr L Phs +
For example:
● Use A and V to change the phase of the left surround
speaker.
40
Sides
Subwoofers
If your layout includes side surround speakers an additional
Sides option allows you to adjust the relative phase and delay.
Side L presents the signal to the front left, rear left, and side left
speakers and you adjust the phase of the side left speaker for
reinforcement, as with Centre Phase. Side R repeats the test for
the three right speakers.
In this calibration test the Low noise signal is used to allow you
to calibrate the phase and delay of each subwoofer in turn
relative to another reference speaker. The reference chosen
depends on the layout.
● Use > or < to switch between phase or delay.
● Use > or < to switch between phase or delay.
● Use A or V to change the phase.
When adjusting phase the display shows the absolute phase of
the subwoofer.
M Sub Phs +
● Use ] or [ to switch between Side L and Side R.
For example:
You should not adjust the delays as these have already been
specified when you time-aligned the layout.
● Use A and V to change the phase.
41
Choose the position in which the subwoofer reinforces the
sound from the main speakers in the crossover region.
Layout Sounds Adjusting Adjust phase for
A
L and MS
L and CS
L and LS
R and RS
MS
CS
LS
Crossover reinforce
Bass adding to L bass
Crossover reinforce
Crossover reinforce
Bass reinforcing check
Crossover reinforce
Bass adding to L bass
Bass adding to LS
You should not adjust the delay as this has already been
specified when you time-aligned the layout.
B
C, K
Other subwoofers
RS
LS and RS RS
● Press Store to adjust any additional subwoofers in the system
in exactly the same way. In each case adjust the phase for
maximum reinforcement.
D
E
L and MS
L and CS
MS
CS
● Use ] and [ to step between the subwoofers.
LS and CS CS
LS and RS RS
L and LRS LRS
LRS and CS CS
In the case of other configurations you will be balancing different
combinations, in some cases the best test is that multiple
subwoofers reinforce each other or the bass from wideband
speakers like the main left and right (if applicable).
Bass reinforcing check
Crossover reinforce
Bass adding to LRS
Bass adding to L bass
Bass adding to CS
F
H, J
L and CS
CS
The table opposite lists the combinations and adjustments you
may make for the different Layout options; see Specifying the
speaker layout, page 22.
CS and SS SS
Key: L=Main Left, R=Main Right, MS=Mono Sub, CS=Centre
Sub, LS=Left Sub, RS=Right Sub, LRS=Left+Right Sub,
SS=Surround Sub.
42
ADC Check
The digital surround processor selects its analogue input, and
replays the signal through the speakers.
The display shows when the input level
Over
comes within 3dB of full scale:
Play any analogue source, or sources connected via an ancillary
preamplifier or switchbox, choosing the loudest material. The
input signal level should be adjusted so that the Over display
hardly ever occurs.
What next?
This test provides metering to help you set the level of the
analogue inputs. The analogue-to-digital converter (ADC) fitted
for the analogue input to the 565 has a sensitivity of 2V rms for
full scale. With this setting, the analogue input can be connected
to the output of a LaserDisc or CD player and will not require
adjustment. If the analogue signal comes from a preamplifier or
control unit, then it is important to ensure that the internal ADC
is not overloaded.
Congratulations – your 565 Digital Sound Processor is now set
up and ready for use. Refer to the user’s guide for information
about using the digital surround processor with your music and
cinema sources.
The remaining chapters in this guide give more advanced
information about configuring the digital surround processor’s
sources, and further reference and troubleshooting information.
In this calibration test the display
ADC Check
shows:
43
Test signals
In Calibration you can make adjustments using a number of
different signals, shown in the table below. Normally the 565
selects the most appropriate signal for the test.
To select a different test signal
● Press the Display key.
Signal
Description
To test for room vibrations
High
Continuous ‘pink’ noise, band-limited
500Hz–2kHz.
Low
Continuous ‘pink’ noise, band-limited
20Hz–80Hz.
Digital In
Any signal applied to the appropriate
input is combined to mono (L+R) and
then used to supply outputs under
calibration. This allows adjustments to
be made using speech or music, or
external test signals from CD or
LaserDisc.
Optical In
Analogue In
The Sine Sweep test signal allows you to check your room for
rattles and buzzes which could interfere with your listening.
Sine Sweep
Silence
For checking room resonance and
vibration; see opposite.
● Press the Display key until the
Sine Sweep
display shows:
No test signal – useful for tracking
down hum and noise.
● Use the =, ˘, ¯, and > (Play) keys on the Meridian System
Remote to control the Sine Sweep.
44
Setting up sources
This chapter explains how to set up the sources connected to the digital
surround processor, and configure them to suit your other equipment.
When you set up the digital surround processor to one of the standard
settings, 12 sources are automatically set up for you.
If you wish, you can configure each source individually to choose its label,
the audio input it selects, and the DSP preset it uses.
Standard source settings
The digital surround processor provides 12 sources
corresponding to the 12 source selection keys on the Meridian
System Remote.
When the digital surround processor is set to one of the
standard settings the sources are set up with the labels, inputs,
and presets shown in the table below.
Source
Types
0 – 5
Types 2-channel
0 562 – 5 562 preset
Digital
preset
DTS
preset
MPEG
preset
CD
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Trifield
Digital Mu
Digital Mu
Digital
DTS Mu
DTS Mu
DTS
MPEG Mu
MPEG Mu
MPEG
Radio
LP
Analogue
Analogue
Analogue
Analogue
Analogue
Digital
Music
Music
TV
TV Logic
Music
Digital
DTS
MPEG
Tape 1
Tape 2
CDR
Cable
DVD
VCR 1
VCR 2
LD
Digital
DTS
MPEG
Music
Digital
DTS
MPEG
Trifield
Digital
DTS
MPEG
Analogue
Digital
TV Logic
Pro Logic
Pro Logic
Pro Logic
THX Cinema
Digital
DTS
MPEG
Digital
DTS
MPEG
Analogue
Analogue
Optical
Digital
DTS
MPEG
Digital
DTS
MPEG
Digital THX
DTS THX
MPEG THX
46
If the configuration you want is not catered for by one of the
standard settings, you can configure each source individually.
● Press Source until the left-hand pair of characters identifies
the source you want to configure.
For each source you can configure:
For example, to configure the CD
CD CD
source the display initially shows:
❍ The label used for it on the front panel display, from 54
alternative labels.
The right-hand part of the display shows the current value of the
option.
❍ The audio input it selects.
❍ The DSP preset to be used.
❍ The comms type and address, to identify other Meridian 500
Series equipment.
To change an option
● Press A or V to step between the alternative values for the
The procedure for doing this is as follows.
option.
To configure a source
When you have finished programming sources:
● Switch off the 565, using the power switch on the back panel.
● Switch off at the back panel, and then switch on again to
restore normal operation.
● Switch on the power again while holding down the Display
key on the front panel.
Config
The display will show:
47
The options are summarised in the following table:
Option
Initial value
Alternative values
Explanation
Label
CD, RD, LP, etc.
See To change a source label, page 50.
CD CD
Audio input
2-channel preset
Precision
Digit.In, Opt.In, Anlg.In,
or Last Valid.
Choose the appropriate option for the digital, optical, or
analogue inputs, or Last Valid to use the last valid input.
CD Digit.In
CD Music
CD 16 Bits
CD 1C
Music, ProLogic, etc,
Choose the DSP preset you want to use for two-channel
No Preset, or user preset. audio streams, or No Preset to use the last valid preset.
16, 18, 20, or 22 Bits.
1C–8C or NC.
All CDs and LaserDiscs are currently 16 bits. The 518
provides 22 bits.
Comms type
Address
Choose IC for a Meridian CD player, 2C for a Meridian
FM Tuner, or NC otherwise.
1A–8A.
Allows you to have up to eight of each source type.
CD 1A
Digital preset
DTS preset
Digital, Digital THX,
Choose the DSP preset you want to use for Dolby Digital
CD Digital
CD DTS
Digital Mu, or user preset. audio streams.
DTS, DTS THX, DTS Mu, Choose the DSP preset you want to use for DTS audio
or user preset.
streams.
48
Option
Initial value
Alternative values
Explanation
MPEG preset
MPEG, MPEG THX,
Choose the DSP preset you want to use for MPEG audio
CD MPEG
MPEG Mu, or user preset. streams.
MLP preset
DTS delay
MLP or user preset.
Choose the DSP preset you want to use for MLP
CD MLP
(Meridian Lossless Packing) audio streams.
Y or N.
Allows you to add a 30 msec delay to avoid an initial hiss
with non-video DTS sources.
DTS Delay Y
The last valid, or L.V. options leave the corresponding setting unchanged from its previous value.
For a full list of presets see the 565 User Guide.
49
Examples of configuring the sources
The following examples illustrate how you can configure the
source options to your own requirements.
To use a source key to change DSP
preset
To change a source label
If you have fewer than 12 different sources you can use some of
the source keys on the Meridian System Remote to change the
DSP preset.
● Display the source you want to configure, together with its
current label, as described in To configure a source, page 47.
● Configure the source key you are going to use with the audio
For example, to configure the
input set to Last Valid, and the required DSP preset.
RD RD
Radio source label choose:
For example: Source CDR, Label C1, Audio input Last Valid,
2-channel Preset Ambisonic.
● Press A or V to step between the alternative labels.
For example, to use the label FM
Selecting the CDR source key will now switch the DSP preset to
RD FM
for the Radio source set it to:
Ambisonic, leaving the input unchanged.
Over 50 alternative labels are provided to allow you to choose
the most appropriate ones for your sources. Selecting None
turns off the source.
50
To set up a system with two Meridian
CD players
To set up two sources for DVD, one
for audio CDs and one for video DVDs
● Configure the source you are going to use for the first CD
● Configure the source key you are going to use for audio CDs
player.
with the digital input, and an appropriate 2-channel preset.
For example: Source CD, Label C1, Audio input Digit.In, Comms
type 1C, Address 1A.
For example: Source CD, Label CD, Audio input Digit.In,
2-channel preset Trifield.
● Configure the source you are going to use for the second CD
● Configure the source key you are going to use for video DVDs
player, with a different address.
with the digital input, and an appropriate Digital preset.
For example: Source CDR, Label C2. Audio input Opt.In,
Comms type 1C, Address 2A.
For example: Source DVD, Label DV, Audio input Digit.In, Digital
preset Digital.
You will also need to configure this CD player to have the same
address; eg 2A.
The Meridian System Remote will now automatically control
whichever of the CD players you have selected with the CD or
CDR source keys.
51
52
Troubleshooting
This chapter provides suggested solutions to typical problems that may
occur when setting up the digital surround processor.
If you are still not able to resolve a difficulty with the help of this guide and
the suggestions in the following pages, please contact your Meridian
dealer or Meridian Audio Ltd.
General operating problems
Standby point not lit
Communications not working with
other Meridian products
Check the following:
❍ Check the connections carefully.
❍ There is AC power connected to the socket on the rear of the
565.
❍ Are you using a mix of 200 and 500 Series units?
❍ The power switch on the rear panel of the 565 is turned on.
Erratic or unexpected system
behaviour
If the 565 will still not illuminate, check any fuses in your power
supply and the fuse in the inlet of the 565. If these are all intact,
contact your dealer.
Redo the Auto Configure process; see Connecting to other
Meridian equipment, page 18.
Remote not working
If this fails, the memory of the 565 may have been corrupted. If
this is suspected perform a full reset.
Check the following:
I am playing a Dolby Digital DVD, but
the 565 selects the Pro Logic preset
❍ The battery in the Meridian System Remote.
❍ Remove the 500 comms connections from the 565, does it
respond now? If so, replace the connections and perform an
Auto Configure procedure; see Connecting to other Meridian
equipment, page 18.
DVDs include a 2-channel Dolby Digital soundtrack, which will
use the default 2-channel preset.
❍ See if the 565 is set to Not Controller in Config; see To set
other configuration options, page 27. Note that this may be
deliberate by your dealer.
❍ Select a 6-channel soundtrack, if it is available.
54
Audio problems
Hum on analogue input
There is radio interference
There is no reason for the 565 to produce hum on the analogue
input.
The 565 is a digital audio and computing device which has been
designed to very high standards of electromagnetic
compatibility.
❍ Check the source equipment. Disconnect each source in turn.
❍ If the hum originates from a ground loop an antenna or cable
supply may be the cause, in which case an antenna-lead
isolator should be fitted.
If this equipment does cause or suffer from interference to/from
radio or television reception then the following measures should
be tried:
❍ If the 565 seems to be the cause of hum consult your dealer.
❍ Reorient the receiving aerial (or antenna) or route the antenna
cable of the receiver as far as possible from the 565 and its
cabling.
Poor sound quality
Poor sound quality will usually result from driving an analogue
input too hard.
❍ Ensure that the receiver uses well-screened antenna cable.
❍ Relocate the receiver with respect to the 565.
❍ Connect the receiver and this product to different AC outlets.
❍ If the problem persists contact you dealer.
❍ Turn down the analogue input level.
❍ To optimise this use the ADC Check procedure; see ADC
Check, page 43.
55
Audible hiss at high volume settings
sources are stopped. This hiss is lower than the background
noise of your recordings and should be of no consequence.
The input dynamic range of any recordings you have are at
maximum 16 bit. The reason for this is that currently CD, DVD,
and LaserDisc use a 16-bit standard although DVD can support
up to 24-bits. The analogue sources you have cannot achieve
this kind of range. For comparison, analogue sources are likely
to be of the order of:
The 565 has 18-bit output precision on the analogue outputs.
Other sources of hiss may be tracked down using either:
❍ The Mute option. When muted the outputs are reduced to the
dither at the selected precision.
❍ VCR, 12 bits.
❍ The Silence test signal; see Test signals, page 44.
❍ FM radio, 13 bits.
❍ Reel-reel tape, 13 bits.
❍ Cassette tape, 12 bits.
❍ LP, 11 bits.
Crackling on optical inputs
Some optical sources, in particular some LaserDisc players,
provide poor drive waveforms that do not meet the EIAJ
standard, in that the light modulates but never goes quite ‘black’
between pulses. If you experience crackling on the optical input
or an occasional reluctance to lock, ie provide a sound,
investigate as follows.
Note that there may be a difference between the dynamic range
of the source channel when it is operating, and the noise you
hear in standby. For example, LP normally has lower noise when
the stylus is not in the groove; similarly tape will be quieter when
it is stopped. CD may also be quieter when it is stopped,
producing so called ‘digital silence’.
❍ Try other fibres.
❍ Pull the fibre part-way out and see if the problem clears up.
❍ Try another player or CD player on the optical input.
❍ Contact Meridian for up-to-date advice on this point.
The 565 has a 16-bit capability on its internal analogue-to-digital
converter, which is used for analogue sources. When the volume
is turned up high you may hear its dither as a hiss when the
56
Sound not clear
There is a hiss when starting DTS
LaserDiscs
❍ If speech sounds muffled in a system with a centre speaker,
check that sound is coming from the centre as there may be a
connection problem. In a digital or Meridian feed to the centre
you may have set it up to be right instead of left so that it is
playing a subwoofer signal.
The DTS audio stream is indistinguishable from a PCM audio
stream; the 565 takes 30 msec to identify the encoding, during
which a hiss is heard.
❍ If speech sounds muffled in a system with no centre speaker,
you may have selected a layout that expects one. See
Specifying the speaker layout, page 22.
❍ With non-video DTS sources you can add a 30 msec delay to
avoid this. However, with video sources the delay would
cause a noticeable sync problem, so the hiss is unavoidable.
Centre not working
There may be a connection problem.
❍ In a digital or Meridian feed to the centre, you may have set it
up to be right instead of left, and therefore it may be playing a
subwoofer signal.
57
Video problems
TV does not work using the 565
Poor picture quality
❍ Check all video connections; the input is the lower connector
of the pair.
Picture quality may suffer if you do not attend to the following:
❍ Temporarily remove the 565 from the video circuit. The fault
will probably be elsewhere or in a cable.
❍ Are you using suitable quality cables with good connectors?
❍ Is there a ground loop created between any of the
components connected to the 565?
Remember that reception of broadcast or cable signals can be
significantly deteriorated by cross-modulation in the RF domain.
It is unwise to attempt to cascade and mix several video
sources, eg LaserDisc, VCR, etc, to an antenna system.
58
Index
A
Ambisonic
4
CD players, two 51
Connections 11
Analogue input 10
C-VIDEO 12
Analogue input 10
setting sensitivity 43
Analogue preamplifier
Analogue speakers,
connecting 10
Centre speaker
setting delay 38
setting phase 38
2
6
C-VIDEO IN
9
troubleshooting 57
C-VIDEO OUT
cables 11
9
Checking room vibrations 44
Choosing standard settings 20
Communications mode 27
Communications,
Aspect ratio, specifying 25
Audio inputs 10
CENTRE/SUB 3-4 10
COMMS 11
Audio outputs 10
communications 11
DIGITAL IN 10
MAIN 1-2 10
Automatic setup 18
troubleshooting 54
Components
8
C
Calibration procedure 33
exiting 35
Configuring sources
AC-3 preset 48
address 48
OPTICAL IN 10
REARS 7-8 10
RS232 11
starting 35
Calibration tests 36
ADC Check 43
Centre Phase 38
Front-Rear 39
Levels 36
audio input 48
S-LEADS 11
comms type 48
examples 50
SIDES/SUB 5-6 10
Controller
5
label 48
Controller mode 27
precision 48
Controller, setting 18
Main 37
Connecting
Crackling on optical inputs 56
Crossover frequency 27
Sides 41
to Meridian 500 Series
equipment 18
Subwoofers 41
Surround 40
Connecting sources 15
Connecting speakers 13
Connecting video 12
test signals 44
59
Layouts (continued)
D
F
Digital connections, cables 11
DIGITAL IN 10
Hum on analogue input 55
Introduction
G
H
J
2, 3, 4, 24
24
I
1
DSP Loudspeakers. See Meridian
DSP Loudspeakers
24
L
LaserDisc
Layout
6
K
L
24
DSP preset, using source keys to
change 50
2, 5, 24
3, 24
24
specifying 25
M
N
with large left and right speakers 22
with small left and right speakers 23
Layout examples
501/501V Control Unit
6
LFE subwoofer
3
connecting to 16
519 Demodulator
6
M
M2500 Active Subwoofer,
connecting to 14
five-channel surround system
four-channel surround system
3
connecting to 15
3
551 Integrated Amplifier,
connecting to 17
Menu mode 27
seven-channel surround system
surround system with full-range
4
Meridian 500 Series operation,
setting 18
555 Stereo Power Amplifier,
connecting to 14
speakers
5
Meridian Active Loudspeakers,
connecting 13
three-channel surround system
2
562/562V Digital Control Unit
connecting to 16
6
THX system
4
Meridian DSP Loudspeakers
connecting 10, 13
Layouts 22
Five-channel surround system
Four-channel surround system
Front panel volume 27
3
A
4, 24
3
setting up 30
AB 24
AG 24
using
5
Full-range speakers
5
Mono subwoofer 3, 4
B
C
D
E
24
24
24
24
H
Hiss at high volume settings 55
Hiss starting DTS LaserDiscs 57
Home cinema
3
60
O
P
On-screen display (OSD)
during calibration 34
troubleshooting 58
Optical connections 11
OPTICAL IN 10
Sound Pressure Level meter 34
Sources
Subwoofers
crossover 14
in layouts 23
changing label 50
configuring 47
LFE
3
connecting 15
mono
3
planning
6
setting phase 41, 42
Planning a system
Planning sources
2
setting up 45
specifying 5.1 LFE 27
specifying type 32
6
Speaker outputs
Poor picture quality 58
Poor sound quality 55
gain 32
Surround system with full-range
output delay 30
speakers
Surrounds
5
Positioning
8
output precision 31
output type 29
Product address 27
in layouts 23
phase 32
specifying number 26
specifying type 26
System address 27
R
S
Radio interference 8, 55
setting levels 36
Rear panel
9
setting up 28
RS232 connection 11
speaker protection for 5.1
sources 31
T
Test signals 44
Setting up sources 45
Three-channel surround system
THX level 36
2
subwoofer type 32
time-aligning 28
Setting up the Digital Surround
Processor
7
THX system
4
Speakers, connecting 13
Specifying the speaker layout 22
Standard settings 20, 21
choosing 20
Seven-channel surround system
Side surrounds, setting relative
phase 41
4
Time-aligning the system 28
Troubleshooting 53
Audio problems 55
Sine Sweep 44
General operating problems 54
Video problems 58
Standard source settings 46
Sound not clear 57
61
Types 20
standard 46
with 562 21, 46
U
V
Unpacking
8
Video connections
Volume mode 27
9
62
|