Linn Speaker AKURATE Loudspeaker System User Manual

English  
Français  
Deutsch  
Italiano  
Español  
Nederlands  
AKURATE Loudspeaker System  
Owner’s Manual  
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English Important Safety Information  
UK USERS PLEASE READ THIS  
CE Declaration of Conformity  
Linn Products Ltd declare that this product is in conformance with the Low Voltage Directive 73/23/EEC and  
Electromagnetic Compatibility 89/336/EEC as amended by 92/31/EEC and 93/68/EEC.  
IMPORTANT SAFETY INFORMATION  
Fuse replacement  
This appliance is fitted with a non-rewireable 13 Amp mains plug. The plug contains a  
5 Amp fuse. If the fuse has blown it can be replaced as follows:  
The conformity of the designated product with the provisions of Directive number 73/23/EEC (LVD) is proved by  
full compliance with the following standards:  
a) Pull out the red fuse cover/carrier.  
Standard number  
EN60065  
Date of issue  
2002  
Test type  
General requirements  
b) Remove and dispose of the blown fuse.  
Marking  
Hazardous radiation  
Heating under normal conditions  
Shock hazards under normal  
operating conditions  
c) Fit a new 5 Amp BS1362 approved fuse into the carrier and push the carrier  
back into the plug.  
Insulation requirements  
Fault conditions  
Mechanical strength  
Parts connected to the mains supply  
Components  
Terminal devices  
Always ensure the fuse cover is fitted. If the fuse cover is missing do not use the plug.  
Contact your Linn retailer to obtain a replacement fuse cover.  
Fuses are for fire protection and do not protect against electric shock.  
External flexible cords  
Electrical connections and mechanical fixings  
Protection against electric shock  
Stability and mechanical hazards  
Resistance to fire  
Mains plug replacement  
Should your mains plug need replacing and you are competent to do this proceed as  
follows. If you are in doubt contact your Linn retailer or a competent electrician.  
a) Disconnect the plug from the mains supply.  
The conformity of the designated product with the provisions of Directive number 89/336/EEC (EMC) is proved by  
full compliance with the following standards:  
b) Cut off the plug and dispose of it safely. A plug with bared conductors is  
dangerous if engaged in a live socket.  
Standard number  
EN55013  
EN55013  
Date of issue  
2001  
2001  
Test type  
Conducted emissions  
Absorbed emissions  
Immunity  
c) Only fit a 13 Amp BS1363A approved plug with a 5 Amp fuse.  
EN55020  
2002  
d) The cable wire colours or a letter will be marked at the connection points of most  
quality plugs.  
FCC notice  
NOTE:  
Attach the wires securely to their respective points. The Brown wire must go to the Live  
pin, the Blue wire must go to the Neutral pin, and the Green/Yellow wire must go to the  
Earth pin.  
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part  
15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a  
residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not  
installed and used in accordance with the instructions, may cause harmful interference to radio communications.  
However, there is no guarantee that interference will not occur in a particular installation.  
If this equipment does cause harmful interference to radio or television reception, which can be determined by  
turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the  
following measures:  
e) Before replacing the plug top ensure that the cable restraint is holding the outer  
sheath of the cable firmly and that the wires are correctly connected.  
WARNING  
THIS APPLIANCE MUST BE EARTHED.  
Reorient or relocate the receiving antenna.  
Increase the separation between the equipment and receiver.  
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.  
Consult the dealer or an experienced radio/TV technician for help.  
AKURATE Loudspeaker System  
Owner’s Manual  
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Copyright and Acknowledgements English  
Copyright and Acknowledgements  
Copyright © 2003 Linn Products Ltd. First edition July 2003.  
Linn Products Limited, Glasgow Road, Waterfoot, Eaglesham, Glasgow, G76 OEQ,  
Scotland, United Kingdom  
All rights reserved. No part of this publication may be reproduced, stored in a retrieval  
system, or transmitted, in any form or by any means, electronic, mechanical,  
photocopying, recording, or otherwise, without the prior written permission of the  
publisher.  
Printed in the United Kingdom.  
Trade marks used in this publication: Linn and the Linn logo are registered trade marks  
of Linn Products Limited. AKURATE*, AKTIV, SEKRIT and SKEETS are trade marks of  
Linn Products Limited.  
The information in this manual is furnished for informational use only, is subject to  
change without notice, and should not be construed as a commitment by Linn Products  
Limited. Linn Products Limited assumes no responsibility or liability for any errors or  
inaccuracies that may appear in this manual.  
* Patent pending  
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Contents English  
Contents  
AKURATE 221  
Unpacking  
9
9
Introduction  
The AKURATE system  
Features  
1
1
Voltage selection  
Positioning  
Fabric grille  
Cleaning  
9
2
9
9
AKURATE 242, 225 and 212  
Unpacking  
3
3
3
3
4
6
9
Connecting  
Operation  
10  
11  
Fabric grilles  
Cleaning  
Operating modes  
Parameters  
11  
11  
Positioning and levelling  
Connecting  
Technical Specifications  
Guarantee and Service  
13  
14  
General  
6
7
7
7
7
7
8
Single-wiring  
Bi-wiring or bi-amping  
Tri-wiring or tri-amping  
Important notes on using the link strips  
Quad-amping and beyond  
Bass Boost  
AKTIV operation  
8
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Introduction English  
The AKURATE system  
Introduction  
AKURATE 242 – A five-way, bass reflex, floorstanding loudspeaker, precision  
engineered for use in medium to large sized listening areas. The AKURATE 242  
speaker incorporates dual 6 1/2” (16.5 cm) drivers mounted vertically for  
controlled, tuneful and extended bass performance.  
At Linn, we recognise that the way people access sound is changing.  
Entertainment systems are becoming ever more integrated and the line  
between music and movie systems is no longer clear. As the popularity of new  
and improved hi-resolution music formats increases, multi-channel systems are  
no longer for the movie enthusiast only.  
AKURATE 212 – A compact, high-performance, four-way, bass reflex, bookshelf  
loudspeaker. It features a single 6 1/2” (16.5 cm) bass driver and is designed for  
use as a main speaker in smaller rooms or surround channel effects  
applications. A custom designed stand is available for this model to allow  
positioning for optimum performance.  
As we change the way we access sound, the equipment we use to relay that  
sound must also change. A modern loudspeaker must offer greater levels of  
flexibility, reproduce a wider range of sounds and playback at a higher  
resolution to truly communicate the full potential of the system. The  
loudspeaker communicating the awesome force of an explosion in a movie  
blockbuster must be subtle enough to replay the tone and emotion of the  
softest female jazz vocal.  
AKURATE 225 – A centre channel loudspeaker designed primarily to match the  
AKURATE 242 speakers. The AKURATE 225 speaker uses the same drive unit  
complement as the AKURATE 242 speaker and has been tolerance-matched to  
the other AKURATE loudspeakers to allow seamless system integration. A  
custom designed stand is available for this model to allow positioning for  
optimum performance.  
With this in mind, Linn presents AKURATE - a system of complementary  
loudspeakers, visually and sonically designed to achieve seamless multi-channel  
performance.  
AKURATE 221 – Bass extension in the AKURATE system is provided by the  
powered 221 subwoofer. The unit is driven by a 500 W power amplifier and  
features an 8” (20.3 cm) servo-controlled driver in a 21-litre enclosure for pure,  
precise bass response.  
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English Introduction  
Features  
AKURATE 221  
New 500S Amplifier Module  
The AKURATE 221 bass extension loudspeaker  
AKURATE 242, 225 and 212  
utilises 500 watts of servo-assisted Linn silent power. The bass drive unit is  
constantly monitored and regulated to maintain accurate, extended bass in any  
listening environment.  
Linn 3-K Driver Array (patent pending) Linn designed and engineered drive unit  
array delivers optimised dispersion and high frequency performance. Provides  
open and natural presentation and clear, precise dialogue and effects. All  
components used in the 3-K Array are matched to a close tolerance, retaining  
sonic purity and consistency throughout.  
Entire System  
SEKRIT-Fastener Invisible, flush-fitting, speaker grille technology.  
Unique Linn Loudspeaker Configuration System Input connector system enabling  
passive multi-wiring/amplifier operation and a simple, clear upgrade path to an  
active system. You can begin with a complete, high quality, passive loudspeaker  
system and achieve performance enhancements through easy upgrade to full  
active operation.  
Magnetic Shielding To avoid magnetic interference with other household  
products such as a television or a mobile communications device, all of the  
loudspeakers within the AKURATE system are magnetically shielded.  
1
/
High Quality 6 2” (16.5 cm) Sandwich-Cone Bass Drive Units Layered cone design  
delivers pitch accurate, musical, bass extension.  
AKURATE 242 and 225  
Bass Extension Feature Allows calibrated tailoring of the bass response to suit  
room acoustics or environment.  
AKURATE 242 and 212  
Acoustically Matched Double-Flared Ports Unique, mirrored “rifling” design  
reduces turbulence and matches the impedance of internal cabinet volume with  
the external environment.  
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AKURATE 242, 225 and 212 English  
The AKURATE 212 bookshelf speakers are supplied with the following  
accessories:  
AKURATE 242, 225 and 212  
Unpacking  
12 terminal link strips (four of which are factory fitted to the terminals);  
4 x four-hole, 4 x three-hole, 4 x two-hole  
4 speaker plugs  
2 foam bungs  
terminal collar tool  
spike kit  
warranty card  
The AKURATE speakers are heavy; take care when removing them from their  
packaging.  
The AKURATE 242 floorstanding speakers are supplied with the following  
accessories:  
this manual  
speaker stand kit  
20 terminal link strips (four of which are factory fitted to the terminals);  
We recommend that you retain the packaging in case you need to transport  
your speaker(s) at a later date.  
4 x five-hole, 4 x four-hole, 4 x three-hole, 8 x two-hole  
4 speaker plugs  
4 foam bungs  
terminal collar tool  
spike adjustment tool  
warranty card  
3-K Array cover  
To remove the protective cover from the 3-K Array, carefully cut through the  
two cable ties. The cover should come away easily.  
this manual  
Fabric grilles  
The AKURATE 225 centre speaker is supplied with the following accessories:  
The AKURATE 242, 225 and 212 speakers are supplied with fabric grilles. The  
grilles are held in place by SEKRIT-Fasteners (shielded magnets hidden within  
the cabinets). Grilles can easily be removed by sliding them downwards (away  
from the magnets) and gently pulling them towards you.  
10 terminal link strips (two of which are factory fitted to the terminals);  
2 x five-hole, 2 x four-hole, 2 x three-hole, 4 x two-hole  
2 speaker plugs  
terminal collar tool  
spike kit  
warranty card  
this manual  
IMPORTANT:  
Do not attempt to remove the metal grilles covering the drivers.  
Cleaning  
Remove dust and fingerprints from the cabinets with a soft, dry, lint-free cloth.  
Avoid using domestic cleaning products as they may damage the veneer.  
The grilles should be removed from the cabinets and cleaned carefully with a  
soft brush.  
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English AKURATE 242, 225 and 212  
Positioning and levelling  
To get the best from your Linn AKURATE speakers, it is important that they are  
positioned and levelled correctly. The acoustics of a room are dependent on  
many factors including size, shape and even furniture. The information below  
will assist in helping you find the best position in your room for your speakers  
and will tell you how to level them correctly.  
Positioning  
It pays dividends to experiment with loudspeaker positioning. However, the very  
nature of the 3-K Array and its close driver proximity ensures uniform  
dispersion characteristics and therefore should not require any significant  
degree of toeing-in to improve performance.  
A loudspeaker placed too close to a wall will tend to affect bass definition  
creating a bass ‘bloom’, so a minimum of 9” (23 cm) is recommended between  
the back of a speaker and the closest wall. If lack of space is an issue, foam  
bungs are provided for insertion into the AKURATE 242 and 212 speakers’ rear  
reflex ports to seal the cabinets. This converts the speakers to an infinite baffle  
design and allows them to be placed closer to a wall. The AKURATE speaker  
system will work effectively in free space, but if bass extension is limited the  
AKURATE 242 and 225 speakers contain a Bass Boost feature to enhance the  
bass frequencies below 200 Hz (see Bass Boost section).  
min. 9" (23 cm)  
min. 9" (23 cm)  
Centre  
min. 9" (23 cm)  
Subwoofer  
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AKURATE 242, 225 and 212 English  
Press down firmly on the top of the speaker to ensure it is in close  
contact with your flooring.  
Levelling  
Use the spirit level as before and continue to adjust the spikes as  
required.  
All components in the AKURATE speaker system benefit from levelling, which  
produces distinct improvements in soundstage and accuracy. A properly  
levelled loudspeaker will always perform more effectively than an unstable one.  
The actual loudspeaker cabinet can remain fixed whilst the drive units are  
allowed to move as precisely determined by the playback signal from the  
amplifier. Adjustable spikes or feet enable levelling on uneven floors, however  
these adjustments are subtle and will not compensate for excessively irregular  
floors.  
When the speaker is level and does not rock, use the screwdriver to hold  
the spikes in place and tighten the lock nuts using the tool provided (3).  
(3)  
Spikes are supplied with the AKURATE 242 speakers and the stand for the  
AKURATE 225 and 212 speakers.  
The procedure for levelling each speaker should be as follows:  
Use a spirit level on the top of the speaker to check if it is sitting level. If  
it is, gently rock the speaker from front to back, side to side and  
diagonally to check for any movement. If none is present and the speaker  
is sitting level, no adjustment to the spikes is necessary.  
Note:  
If the speaker is not level, or moves when you rock it, loosen the  
appropriate lock nuts using the tool provided (1) and use a screwdriver to  
turn the spikes to adjust their height (2).  
To protect wooden or tiled floors the spikes can be placed on Linn SKEETS  
which are available from your Linn retailer.  
(2)  
(1)  
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English AKURATE 242, 225 and 212  
To remove/fit the link strips:  
Connecting  
Carefully remove the blanking plugs that are in the terminals, using a thin  
blade.  
General  
IMPORTANT:  
Use the supplied tool to unscrew the terminal collars.  
Before making any connections, switch off your power amplifier(s).  
Ensure the positive (+) or red coloured connectors from your amplifier(s),  
connect to the positive (+) connectors on your loudspeaker(s). And that the  
negative (-) or black coloured connectors from your amplifier(s), connect to the  
negative (-) connectors on your loudspeaker(s).  
AKURATE 242 and 225  
The AKURATE 242 and 225 speakers are supplied with several terminal link  
strips. These strips can be connected to the terminals on the back of the  
speakers to provide a wide variety of amplifier-speaker connection  
configurations. The links connect two, three, four or five terminals together  
allowing for single-wiring, bi-wiring, tri-wiring, or connection to up to five  
separate power amplifier channels. The speakers are supplied from the factory  
with the five-hole link strips attached.  
Remove/fit the required link strips.  
Replace all the terminal collars, making sure they are tightly secured.  
Replace the blanking plugs.  
AKURATE 212  
The AKURATE 212 speaker is supplied with several link strips. These strips can  
be connected to the terminals on the back of the speaker to provide a wide  
variety of amplifier-speaker connection configurations. The links connect two,  
three or four terminals together allowing for single-wiring, bi-wiring, tri-wiring  
or connection to up to four separate power amplifier channels. The speakers are  
supplied from the factory with the four-hole link strips attached.  
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AKURATE 242, 225 and 212 English  
Single-wiring  
Tri-wiring or tri-amping  
Position of link strips if single-wiring (i.e. using a single pair of cables from one  
stereo power amplifier).  
Suggested position of link strips if tri-wiring (i.e. using three pairs of cables  
from one power amplifier) or tri-amping (i.e. using one pair of cables from each  
of three power amplifier channels).  
Output from  
power amplifier  
can be  
Output from  
Output from  
connected to  
power amplifier  
either of the  
Output from  
two terminals.  
ACTIVE  
power amplifier  
can be  
BASS  
MID  
TWEETER  
SUPER TWEETE
ACTIVE  
power amplifier  
can be  
connected to  
either of the  
two terminals.  
can be  
ACTIVE  
connected to  
any of the four  
terminals.  
connected to  
any of the five  
terminals.  
BASS  
MID  
TWEETER  
SUPER TWEETER  
ACTIVE  
Output from  
power amplifier  
can be  
connected to  
either of the  
two terminals.  
AKURATE 212  
AKURATE 242 and 225  
AKURATE 242 and 225  
AKURATE 212  
Bi-wiring or bi-amping  
Important notes on using the link strips  
Suggested position of link strips if bi-wiring (i.e. using two pairs of cables from  
one power amplifier) or bi-amping (i.e. using one pair of cables from each of two  
power amplifier channels).  
The above configurations are only suggestions; many others are possible. If you  
are trying other setups please bear in mind the following points.  
Never use the strips to link positive (+) and minus (-) terminals together.  
Don’t connect more than one strip per terminal.  
Output from  
power amplifier  
can be  
Bass quality will be impaired if you link LOWER BASS and BASS BOOST  
together or UPPER BASS, LOWER BASS and BASS BOOST together.  
connected to  
any of the three  
terminals.  
Output from  
power amplifier  
can be  
ACTIVE  
BASS  
MID  
TWEETER  
SUPER TWEETER  
ACTIVE  
connected to  
any of the three  
terminals.  
Quad-amping and beyond  
Output from  
power amplifier  
can be  
Improved audio quality can be obtained by connecting separate power  
amplifiers to each pair of speaker terminals (bar the BASS BOOST terminals,  
see next page). However, for the best audio performance your AV/hi-fi system  
should be converted from running passively to running actively (see AKTIV  
operation section).  
connected to  
either of the  
two terminals.  
AKURATE 242 and 225  
AKURATE 212  
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English AKURATE 242, 225 and 212  
Bass Boost (AKURATE 242 and 225 only)  
AKTIV operation  
The AKURATE 242, 225 and 212 speakers can be either passively or actively  
driven. In a passive system, the output from a power amplifier is passed  
through the crossovers housed in the loudspeakers. This results in a certain  
loss of audio signal as some of the energy in the signal is absorbed by the  
crossover circuitry. In an active system, or in Linn terms - AKTIV system, the  
crossover circuitry is placed before the power amplifier instead. After passing  
through the crossover, the signal is amplified and sent to the drive units in the  
speaker, bypassing the speaker’s crossover and therefore not losing that bit of  
energy. This results in significantly improved audio performance.  
Depending on the position of the speakers in your room, or room acoustics, you  
may wish to boost the lower bass frequencies (those under 200 Hz). This is  
done by connecting the output from a power amplifier to the BASS BOOST  
terminals on the rear panel.  
If you are bi-wiring Fit the four-hole link strips to the top four positive (+) and  
minus (–) terminals. Connect one pair of speaker cables from the amplifier to  
the linked terminals and the other pair to the BASS BOOST terminals.  
If you are bi-amping Fit the three-hole link strips to the top three positive (+)  
and minus (–) terminals. Connect one pair of speaker cables from one amplifier  
channel to the linked terminals, and bi-wire from the second amplifier channel  
to the UPPER BASS and BASS BOOST terminals.  
AKURATE speakers are shipped in a passive configuration. If you wish to run  
your speakers actively, you must have one Linn power amplifier channel for  
each drive unit in the speakers and each amplifier must be fitted with the  
correct AKTIV crossovers (contact your Linn retailer for further information).  
The last step is to convert your AKURATE speakers from passive to active.  
Your Linn retailer will do this for you.  
If you are tri-wiring Fit the three-hole link strips to the top three positive (+)  
and minus (–) terminals. Connect one pair of speaker cables from the amplifier  
to the linked terminals, a further pair to the UPPER BASS terminals and the  
remaining pair to the BASS BOOST terminals.  
The Bass Boost feature (see left) is not available if a speaker is being actively  
driven.  
Note:  
If you are tri-amping Fit the two-hole link strips to the top two positive (+) and  
minus (–) terminals. Connect a pair of speaker cables from one amplifier  
channel to the linked terminals, a pair from another amplifier channel to the  
MID terminals and bi-wire from the remaining amplifier channel to the UPPER  
BASS and BASS BOOST terminals.  
The AKURATE 242, 225 and 212 speakers can be driven partially active, i.e.  
either the 3-K Array or the bass driver(s) can be actively driven.  
IMPORTANT NOTES ON AKTIV SYSTEMS  
Do not use your amplifiers with any other loudspeakers – you may damage the  
loudspeakers.  
Note:  
If you are using four or five amplifier channels per speaker you do not need to  
use any of the link strips.  
Do not use your loudspeakers with any other amplifiers – their internal  
crossovers will be bypassed and the drivers could be severely damaged.  
Do not use the terminal link strips  
– they can only be used in a passive system.  
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AKURATE 221 English  
Positioning  
AKURATE 221  
The AKURATE 221 speaker can be placed anywhere you find convenient but  
please consider the following points:  
Unpacking  
The AKURATE 221 bass reinforcement speaker is heavy: take care when  
removing it from its packaging.  
The AKURATE 221 speaker is best suited to be positioned on a floor, not  
a table, shelf etc. It is heavy and must be stably supported.  
For best results, position your AKURATE 221 speaker as close as  
possible to either your left front or right front speaker.  
The AKURATE 221 speaker is supplied with the following accessories:  
Bass notes will be accentuated if the AKURATE 221 speaker is positioned  
close to a wall or in a corner.  
mains lead  
phono lead  
warranty card  
this manual  
Experimenting with the position may be necessary in order to match the  
sound of the AKURATE 221 speaker with other speakers in your system  
and the acoustics of the room.  
We recommend that you retain the packaging in case you need to transport the  
AKURATE 221 speaker at a later date.  
Fabric grille  
The AKURATE 221 is supplied with a fabric grille. This grille is held in place by  
SEKRIT-Fasteners (shielded magnets hidden within the cabinet). The grille can  
easily be removed by sliding it downwards (away from the magnets) and gently  
pulling it towards you.  
Voltage selection  
Voltage selection is not needed. Your AKURATE 221 is factory set to operate  
from your local mains supply. The mains lead supplied may be fitted with a fused  
plug according to local regulations. If this is the case, always replace this fuse  
with another of the same type and rating.  
IMPORTANT:  
Do not attempt to remove the metal grille covering the driver.  
This unit must be earthed. Use the earthed mains lead supplied.  
Never use an unearthed plug or adaptor.  
Cleaning  
Disconnect the AKURATE 221 speaker from the power supply before cleaning.  
Remove dust and fingerprints from the cabinet with a soft, dry, lint-free cloth.  
Avoid using domestic cleaning products on the cabinet as they may damage  
the veneer.  
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English AKURATE 221  
Connecting to a stereo pre-amplifier and power amplifier if used  
with ‘small’ (limited bass response) speakers.  
Connecting  
Connect the AKURATE 221 speaker to a mains supply using the mains lead  
provided.  
TO POWER AMPLIFIER  
HP OUT  
IMPORTANT:  
Do not turn on the mains supply until you have connected all other  
components.  
AL OUT  
A IN  
Connecting to a Linn System Controller or other  
AV processor  
HP OUT  
FROM STEREO PRE-AMP  
Note:  
In the above configuration the AKURATE 221 speaker is being used to stop  
low bass notes from being sent to the main speakers.  
FROM LINN SYSTEM CONTROLLER  
OR OTHER AV PROCESSOR  
AL OUT  
A IN  
Connecting to another AKURATE 221 speaker  
AKURATE 221 - ONE  
AKURATE 221 - ONE  
HP OUT  
HP OUT  
Connecting to a stereo pre-amplifier if used with large (full-range  
frequency response) speakers, for example AKURATE 242 or 212 speakers.  
AL OUT  
A IN  
AL OUT  
A IN  
HP OUT  
FROM  
STEREO  
PRE-AMP  
FROM  
STEREO  
PRE-AMP  
FROM LINN SYSTEM  
CONTROLLER  
OR OTHER  
AV PROCESSOR  
OR  
AKURATE 221 - TWO  
AKURATE 221 - TWO  
HP OUT  
HP OUT  
AL OUT  
A IN  
FROM STEREO PRE-AMP  
AL OUT  
A IN  
AL OUT  
A IN  
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AKURATE 221 English  
Parameters  
Operation  
The AKURATE 221 speaker is equipped with seven adjustable parameters (see  
next page) that enable you to alter its performance to suit your taste.  
When you have made all the required connections, switch on the mains supply.  
Flashing bars will be shown on the back panel display for approximately 30  
seconds. During this time the speaker’s servo circuitry is stabilising and no  
audio will be issued. When the display changes to show the standby symbol (see  
table below), the speaker is ready to receive an audio signal.  
Note:  
The parameters can only be adjusted when the AKURATE 221 speaker is not in  
standby mode.  
Whenever the AKURATE 221 speaker is disconnected from the mains supply  
and then reconnected, wait until the standby symbol appears on the display  
before playing a disc.  
Adjusting the parameters  
To select the parameter you wish to adjust:  
Hold FEATURE.  
Operating modes  
Repeatedly press UP or DOWN until the letter for the desired parameter  
appears.  
Key to symbols  
Release FEATURE.  
SYMBOL MODE  
Standby  
MEANING  
Repeatedly press UP or DOWN to change the setting.  
The unit is waiting for an audio signal  
In this mode the unit consumes minimal  
power.  
HP OUT  
AL OUT  
A
IN  
On  
The unit is fully powered-up  
The unit will enter this mode as soon as it  
receives an audio signal.  
A few seconds after the last key press the display  
changes to  
Thermal Standby The unit has overheated  
During very demanding, sustained use the  
-
unit will go into Thermal Standby mode in  
order to allow itself to cool down. When in  
this mode the unit will not produce any  
sound. The unit will return to On mode  
when its temperature has dropped to its  
operating level.  
To restore the default settings:  
Disconnect the AKURATE 221 speaker from the mains supply and wait for  
the display to go blank.  
While holding FEATURE reconnect the mains supply.  
Continue to hold FEATURE until the display shows  
H
FEATURE  
A few seconds after releasing  
the display changes to  
-
AKURATE Loudspeaker System  
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English AKURATE 221  
Description and available settings for parameters  
Default settings are shown in grey.  
PARAMETER  
SYMBOL 0  
1
2
3
4 5  
6
7
8
9
PARAMETER  
SYMBOL 0  
1
2
3
4 5  
6
7
8
9
External high pass  
frequency*  
Coarse gain  
Every one step  
Increasing the setting  
reduces the bass  
content sent to the  
external speakers. (Hz)  
increase in the setting  
raises the gain (volume)  
of the speaker by  
5 decibels. Every one  
step decrease in the  
setting lowers the gain  
(volume) of the  
10 50 75 100 115 135 160 190 235  
-15 -10 -5  
0
+5 +10 +15  
Internal high pass  
frequency  
Increasing the setting  
raises the lowest  
frequency produced  
by the unit. (Hz)  
speaker by  
5 decibels. (dB)  
18 22 25 30 34 40  
Fine gain  
Every one step  
increase in the setting  
raises the gain  
(volume) of the  
loudspeaker by  
1 decibel. (dB)  
Internal low pass  
frequency**  
Reducing the setting  
lowers the highest  
frequency produced by  
the unit. (Hz)  
0
0
+1 +2 +3 +4  
55 85 130  
Bass equalisation  
Every one step  
increase in the setting  
applies an additional  
3 dBs at 30 Hz and  
below. (dB@30 Hz)  
+3 +6  
* Only for use when the AKURATE 221 speaker is connected to a power amplifier  
(see Connecting section in this chapter).  
** If you are using the AKURATE 221 speaker with a Linn System Controller  
or other AV processor, set to 4 (No filtering).  
Time out  
Length of time before  
unit will go into  
5
10 20  
standby after audio  
input ceases. (mins)  
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Technical Specifications English  
Technical Specifications  
AKURATE 242  
5-way floorstander  
AKURATE 225  
AKURATE 212  
4-way bookshelf  
AKURATE 221  
Type  
5-way centre  
Type  
1-way bass reinforcement  
Drive units  
13 mm / 25 mm /  
75 mm domes,  
2 x 165 mm bass units  
13 mm / 25 mm /  
75 mm domes,  
2 x 165 mm bass units  
13 mm / 25 mm /  
75 mm domes,  
1 x 165 mm bass unit  
Drive unit  
203 mm servo bass  
Mains input voltage  
100 V  
Voltage range  
90 - 110 V  
Efficiency  
87 dB for 1 watt at 1 m  
(1 kHz)  
87 dB for 1 watt at 1 m  
(1 kHz)  
87 dB for 1 watt at 1 m  
(1 kHz)  
115 V  
103 - 126 V  
230 V  
207 - 253 V  
Crossover  
options  
Passive / active  
Passive / active  
Passive / active  
Mains supply frequency  
Magnetic shielding  
External frequency response  
Internal frequency response  
50 - 60 Hz  
Yes  
Frequency  
response -  
passive  
49 Hz - 33 kHz  
66 Hz - 33 kHz  
70 Hz - 33 kHz  
Adjustable from 10 Hz – 235 Hz in 9 steps. Default is 10 Hz.  
Adjustable from 55 Hz – 130 Hz in 3 steps and flat (to allow external low  
pass filtering). Default is 85 Hz.  
Frequency  
response -  
active  
40 Hz - 33 kHz  
58 Hz - 33 kHz  
50 Hz - 33 kHz  
Lowest frequency response at  
default settings  
24 Hz @ -3 dB  
Nominal  
impedance -  
passive  
8
8
8
Gain  
Adjustable in 1 dB steps  
Line input impedance  
Line output level  
Output power  
Operating volume  
Dimensions  
Weight  
18 k  
Impedance –  
active (bass)  
16  
8
16  
8
16  
8
Electronically in parallel with line input  
500 W RMS, 1000 W peak  
21 litres  
Impedance –  
active (mid)  
324 mm (H) x 324 mm (W) x 324 mm (D)  
17 kg  
Impedance –  
active (tweeter)  
6
4
6
4
6
4
Impedance –  
active  
(super-tweeter)  
Finishes  
Black Ash, Maple, Cherry, Rosenut  
Crossover points  
All 4th order Linkwitz  
Riley at 225 Hz, 450 Hz,  
3.6 kHz, 9.2 kHz  
All 4th order Linkwitz  
Riley at 225 Hz, 450 Hz,  
3.6 kHz, 9.2 kHz  
All 4th order Linkwitz  
Riley at 450 Hz,  
3.6 kHz, 9.2 kHz  
Connection options Up to 5-way by wire  
or amplifier  
Up to 5-way by wire  
or amplifier  
Up to 4-way by wire  
or amplifier  
Magnetic shielding Yes  
Yes  
Yes  
Operating volume  
Dimensions  
42 litres  
25 litres  
12 litres  
1000 mm (H) x 210 mm  
(W) x 380 mm (D)  
250 mm (H) x 600 mm  
(W) x 300 mm (D)  
350 mm (H) x 210 mm  
(W) x 300 mm (D)  
Weight  
32 kg  
21 kg  
12 kg  
Finishes  
Black Ash, Maple, Cherry,  
Rosenut  
Black Ash, Maple, Cherry,  
Rosenut  
Black Ash, Maple, Cherry,  
Rosenut  
AKURATE Loudspeaker System  
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English Guarantee and Service  
Guarantee and Service  
Linn Products Limited  
Glasgow Road  
Waterfoot  
Eaglesham  
Glasgow G76 0EQ  
Scotland, UK  
This product is guaranteed under the conditions which apply in the country  
of purchase and your statutory rights are not limited. In addition to any  
statutory rights you may have, Linn undertake to replace any parts which  
have failed due to faulty manufacture. To help us, please ask your Linn  
retailer about the Linn warranty scheme in operation in your country.  
Phone:  
Fax:  
Helpline:  
Email:  
+44 (0)141 307 7777  
+44 (0)141 644 4262  
0500 888909  
In parts of Europe, the United States of America and some other markets,  
extended warranty may be available to customers who register their  
purchase with Linn. A warranty registration card is included with the  
product and should be stamped by your retailer and returned to Linn as  
soon as possible.  
Website:  
Linn Incorporated  
8787 Perimeter Park Boulevard  
Jacksonville  
FL 32216  
USA  
Warning  
Unauthorised servicing or dismantling of the product invalidates the  
manufacturer’s warranty. There are no user serviceable parts inside the  
product and all enquiries relating to product servicing should be referred  
to authorised retailers only.  
Phone:  
Fax:  
Helpline:  
Email:  
+1 (904) 645 5242  
+1 (904) 645 7275  
888-671-LINN  
Website:  
Technical support and information  
Linn Deutschland GmbH  
Albert-Einstein-Ring 19  
22761 Hamburg  
For technical support, product queries and information, please contact  
either your local retailer or one of the Linn offices opposite.  
Deutschland  
Full details of your local retailer/distributor can be found on the Linn web  
Phone:  
Fax:  
+49-(0) 40-890 660-0  
+49-(0) 40-890 660-29  
Email:  
Website:  
Important  
Please keep a copy of the sales receipt to establish the purchase  
date of the product.  
Linn Japan  
Kanda Northern Bldg. 4F,  
6-1-4 Sotokanda,  
Chiyoda-ku,  
Tokyo 101-0021  
Japan  
Please ensure that your equipment is insured by you during any  
transit or shipment for repair.  
Phone:  
Fax:  
Helpline:  
Email:  
+813.5816.6881  
+813.5816.6882  
0120 126 173  
Website:  
AKURATE Loudspeaker System  
Owner’s Manual  
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