T E N C H A N N E L P O W E R E D M IX E R
W IT H 2 4 B IT D IG IT A L E F F E C T S
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Table of Conte nts
Introduction
2
3
XM910 Features
Controls and Functions
Front Panel Layout
Front Panel Controls
4 - 5
6-12
XM910 Input and Output Connections
Operating the XM910
13–16
17–20
21–22
System Set-ups
XM910 Wiring Guide
Specifications
23
24
Block Diagram
25
Copyright 2004, Samson Technologies Corp.
Printed March, 2004
Samson Technologies Corp.
575 Underhill Blvd.
P.O. Box 9031
Syosset, NY 11791-9031
Phone: 1-800-3-SAMSON (1-800-372-6766)
Fax: 516-364-3888
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Introduction
Congratulations on your purchase of the Samson XM910 powered mixer! The XM910 is a ten
channel, 900 Watt powered mixer with a built-in, 24 BIT DSP (Digital Signal Processor)
effects. The XM910 will give you clean, clear sound reproduction thanks to the high quality,
low noise microphone preamps, super clean mix bus, two on-board 10-band graphic equaliz-
ers and the high output/low distortion power amplifier. For studio quality processing, you can
add one of the 100 dazzling digital effects including Delays, Chorus and lush Reverbs to your
voice or instruments. The XM910’s ingenius Kickback enclosure allows you to tilt the unit back
to see, and operate, the controls with ease. The unit is easy to transport with its compact size
and oversized, sure-grip handle. The super-tough ABS construction ensures reliable, high
quality sound from venue-to-venue and performance-to-performance day in, and night out.
Optimized for live sound reinforcement and commercial installations, the XM910 is an ideal
mixer and power amp solution offering big sound in a compact package.
In these pages, you’ll find a detailed description of the features of the XM910 powered mixer,
as well a description of its front and rear panels, step-by-step instructions for its setup and
use, and full specifications. You’ll also find a warranty card enclosed—please don’t forget to fill
it out and mail it in so that you can receive online technical support and so we can send you
updated information about these and other Samson products in the future.
With proper care and adequate air circulation, your unit will operate trouble free for many
years. We recommend you record your serial number in the space provided below for future
reference.
Serial number:
Date of purchase:
Should your unit ever require servicing, a Return Authorization number (RA) must be obtained
before shipping your unit to Samson. Without this number, the unit will not be accepted.
Please call Samson at 1-800-3SAMSON (1-800-372-6766) for a Return Authorization number
prior to shipping your unit. Please retain the original packing materials and if possible, return
the unit in the original carton and packing materials.
2
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XM910 Fe ature s
The Samson XM910 Powered Mixer is a comprehensive, all-in-one mixer / power amplifier solution for live sound
applications. Here are some of its main features:
•
Ten channel powered mixer in ergonomically correct kickback enclosure allowing you to easily see and
operate the front panel functions.
•
•
•
Eight Mic / Line inputs with 1/4-inch phone and XLR connectors.
2 x 450 Watts Main, or 450 Watt Main / 450 Watt Monitor, or 900 Watts Bridged power operating modes.
A built-in, 24-bit DSP (Digital Signal Processor) with 100 selectable presets including Reverb, Delay and
Chorus, offers dazzling studio quality effects.
•
Dynamic or condenser microphones connect easily to the low noise mic pre-amps with available 48 Volt
Phantom Power.
•
The 3-Band EQ on each channel enables you to tailor the tonal response for each input.
*
Two Auxiliary sends on each channel for building an independent mix to send to the DSP effects and
monitors.
•
•
Dual 10-band Graphic Equalizer for operating in either Stereo Main, or Main / Monitor, allowing the sys-
tem to be set-up for maximum gain before feedback.
A convenient Tape / CD Input is provided so you connect a stereo device for accompaniment or back-
ground music.
•
•
Brilliant sound quality from the advanced circuit design, utilizing low noise operational amplifiers.
Durable ABS plastic enclosure is road tough insuring reliable performance from night to night and venue
to venue .
•
•
Convenient oversize, sure grip handle make the unit easy to carry.
Three-year extended warranty.
3
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Front Pane l Layout
4
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Front Pane l Layout
5
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Controls and Functions
MONO INPUT CHANNEL SECTION
The following section details each part of the XM910’s INPUT CHANNELS including
the 3-BAND EQ, the MONITOR and EFX sends, PAN, GAIN and VOLUME controls.
AUX 1/ MON - Monitor Se nd
1
Each of the XM910’s channels include a MONITOR send which controls the
amount of that channel’s signal that is sent to the MONITOR bus. The Input
channel’s MONITOR sends are mixed together and are sent to the speakers
connected to the POWER AMP 1 A/B jacks if the POWER AMP select switch is
set to MAIN+MONITOR.
1
2
AUX 2 / EFX Effe cts Se nd
2
The XM910 provides high quality, 24 Bit digital effects, and the level of effects
can be set independently on each channel. The channel’s EFX (Effects) knob
controls the amount of signal that is sent to the EFX bus. The signal of the EFX
bus is routed to the DSP EFX section for on-board signal processing. The EFX
signal can also be sent to an external effect device connected to the AUX 2
SEND jack located on the front panel.
NOTE: The channel’s EFX signal is sent to the EFX bus from a location in the
signal path after the VOLUME control (7). This is commonly referred as a POST
FADER send. This means that the amount of signal that is sent to the EFFECT
bus will be affected not only by the setting of the EFX knob control, but it will
also be affected by the setting of the VOLUME control.
3
4
3
HIGH MID LOW - Channe l Equalize r
The XM910 input channels feature a 3-band equalizer allowing you to adjust the
high, mid, and low frequencies independently on each channel. The channel’s
frequency response is flat when the knobs are in the "12:00" position. Rotating
the knob towards the right will boost the corresponding frequency band by
12dB/15dB, and rotating it towards the left will cut the frequency by 12dB/15dB.
The frequency centers, range of boost or cut, and equalizer type for each band
are as follows:
High: 12KHz +/- 15dB shelving type
Mid: 2.5KHz +/- 12dB peaking type
Low: 80Hz +/- 15dB shelving type
PAN - Control
4
The XM910’s PAN control is used to place or position the mono signal into the stereo main Left and Right
MIX bus. You can create a stereo image by panning some input signals to the left and others to the right.
The XM910’s PAN control is a Power-Pan circuit, which includes a 3dB dip in the center position. This is
desirable since there’s a 3dB increase in gain when the mono input signal is heard in both the Left and
Right MIX bus.
6
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Controls and Functions
MONO INPUT CHANNEL SECTION - continue d
5
6
7
PEAK LED
The XM910’s MIC/LINE pre-amp also includes a PEAK LED which, when illumi-
nated, indicates that the signal is peaking or overloading. To reduce distortion,
lower the GAIN control to keep this LED from staying on.
5
GAIN - Control
6
7
The XM910’s pre-amp stage has a variable GAIN control with a range of -6 to
-50dB on the MIC input and +14 to -30dB on the LINE input.
VOLUME - Leve l Control
The VOLUME control adjusts the output volume of each channel.
STEREO INPUT CHANNEL SECTION
The XM910 features two stereo input strips, which include channels 7/8 and 9/10. While these channels look
very much like the mono channels, they have two inputs so they can accept a stereo signal. The AUX send
and Equalizer are laid out on the same as the mono inputs on the control panel, but internally, they are con-
trolling a stereo signal path. As an added bonus, these inputs also include a microphone input, which can
be used in mono. There are two differences in the stereo channel controls, the Balance control and Gain.
These controls are detailed in the following section.
8
9
BALANCE (Stereo Inputs Only)
The MDR1064’s BALANCE control is used to place or position the stereo signal
into the main Left and Right MIX bus. You can move a stereo signal’s image to
the left or right by setting the BALANCE control to the left or to the right.
8
GAIN - Control (Stereo Inputs Only)
The XM910’s pre-amp stage has a variable GAIN control with a range of -6 to
-50dB on the MIC input and +14 to -30dB on the LINE input.
9
10 VOLUME - Leve l Control
The VOLUME control adjusts the output volume of each channel.
10
7
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Controls and Functions
FRONT PANEL CONTROLS
24 BIT DIGITAL EFFECT SECTION
The XM910 features a built-in, 24 Bit Digital Effects processor with 100 high
quality, studio grade effects like Delay, Chorus and Reverb. The following sec-
tion describes the features of the powerful on-board digital effects section.
11
10
10
SELECT - Digital Effe cts Se le ct Switch
The SELECT switch allows you to pick one of the 100 built-in digital effects.
Simply rotate the SELECT to choose the effect.
11
Program - Effe cts Dis play
The XM910 features a dual, digital, seven segment numerical display for show-
ing the effects program number. You will see the PROGRAM numbers change
as you use the DSP SELECT control to change the effects pre-set.
14
13
12 Effe ct PROGRAM Lis t
This section identifies the ten banks of built-in DSP effects presets. The first
bank of 10 presets are designed for live performance, and the following banks
are set up in groups by the types of effects.
12
13 EFX LEVEL - Mas te r Effe ct Se nd
The EFX LEVEL control is used to send the effect mix bus to an external effect
device connected to the AUX 2 SEND jack.
14
15
EFX BYPASS - s witch
The EFX BYPASS switch is used to turn the internal Digital Effect on and off. The effects are by-passed
when the switch is in the in position and the display shows two dashes.
PEAK LIMITER - Switch
In order to keep the sound loud and clean, the XM910 incorporates an on-
board Limiter dynamic processor. When you press the LIMITER switch in,
the red LED will illuminate indicating that the dynamics processing is
engaged.
15
IMPORTANT NOTE: Unless you are using an external limiter, it is highly rec-
ommended that the LIMITER switch be engaged at all times. This will
ensure the cleanest possible output, and will protect your speaker system
when it accidentally receives a clipped signal from your mixer.
.
8
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Controls and Functions
POWER AMP SECTION
The XM910’s power amplifier section can be configured to operate several ways depending on whether you need
MAIN plus MONITOR amplifiers to power your speakers, or if you just need more power for the MAIN speakers.
The section below describes the XM910 power amp modes.
16 Mode -Powe r amp Mode s witch
The MODE switch is used to select one of
three different operating modes, MAIN-
MONITOR, MAIN-MAIN and MAIN-
BRIDGE. The following is a description of
each of the POWER operating modes:
17
18
CAUTION! Only change the power amp
mode switch when the XM910’s power
is SWITCHED OFF!
16
MAIN-MONITOR
With this setting, the MAIN and MONITOR
sections can be used independently. The
MAIN bus signal will be sent from the
POWER AMP 2 A/B jacks, and the MONI-
TOR bus signal will be sent from the POWER AMP 1 A/B jacks.
MAIN-MAIN
With this setting, the two power amp channels can be used independently. The MAIN bus signal will be
output from the POWER AMP 2 A/B jacks (Rear Panel), and also, from the POWER AMP 1 A/B jacks .
MAIN-BRIDGE
With this setting, the two power amp channels (1 and 2) will be connected in bridge mode. Only the MAIN
bus signal will be output from the BRIDGE jack.
Phantom Powe r - Switch
17
18
The XM910 features an onboard, 48-Volt Phantom power supply to operate condenser microphones.
When the switch is engaged, the LED will illuminate indicating that phantom power is now available on the
microphone pre-amps.
IMPORTANT NOTE: To avoid a loud pop, be sure to turn down the MASTER level controls before plugging
and unplugging the mic cables when the phantom power is active.
Mute CH 1 - 6 - Switch
You can turn off channels one through six with a press of a single button using the MUTE CH 1 – 6 switch.
This is especially convenient when you take a break and want to leave all the levels set so they are ready
when you begin to use your PA system again. The MUTE 1-6 does not turn off channels 7/8 and 9/10,
and does not turn off the CD/TAPE inputs. So, when the MUTE CH 1 – 6 switch is on, you still have a 2
channel DJ mixer with two available mic inputs.
9
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Controls and Functions
MAIN OUTPUT SECTION
The XM910 has two internal power amplifiers and depending on the power amp MODE selection switch, the
amplifiers are sent the MAIN or MONITOR bus signal. The following section describes the MAIN bus operation,
which allows you to adjust the over-all tone and volume, and specify the mix level of the built-in effects.
19 Output Leve l Me te r
The OUTPUT LEVEL METER allows you to
monitor the level of the signal which is being
sent to the MIX OUT jacks.
19
NOTE: To avoid distortion, adjust the MASTER
LEVEL control so that the 0 indicator LED lights
occasionally.
20
MASTER - Volume Control
The MASTER level control is the over-all vol-
ume control for the MAIN bus. The MAIN level
affects both the MAIN bus signal which is output
to the speakers and the line level signal which is
output from the MIX OUT jacks.
21
20
21
22
EFX TO MAIN - Effe cts Re turn Control
22
23
The EFX TO MAIN control is used to adjust the
level of the effect sound being sent back from
the built-in digital effect to the MAIN mix bus.
This allows you to hear the DSP effects in your MAIN speakers.
Graphic Equalize r
The XM910’s 10-band stereo Graphic Equalizer allows you to contour the frequency response of the
MAIN / MONO mix bus signal, providing a maximum of 12dB of cut/boost for each frequency band.
This is an especially useful tool for cutting frequencies that cause annoying feedback. The frequency
response is flat when the sliders are in the center position. Moving a slider in the positive direction will
boost that frequency by as much as 12dB, and moving the slider in the negative direction will cut that
frequency by up to 12dB. Once you set a response curve using the Graphic Equalizer, the EQ curve
is applied to both the MAIN / MONO bus signal that is output to the speakers, and the line level signal
which is output from the MIX OUT jacks.
Low Cut - s witch
23
The MAIN / MONO output of the XM910 includes a LOW CUT (or high pass) filter which rolls off the
low frequencies from 75Hz and below at the rate of 18dB per octave. The LOW CUT filter allows you
to remove the lower frequencies that you sometime just don’t want to pick up. For example, when you
are using the XM910 mostly for vocals, you may not want to pick up the low end generated by other
live instruments like bass and low-end synthesizers played out of back-line amplifiers on stage. In
many live sound applications, the LOW CUT filter is especially useful for removing stage rumble.
10
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Controls and Functions
MONITOR SECTION
The XM910 has two internal power amplifiers and
depending on the MODE selection switch, the ampli-
fiers received their input signals from the MAIN or
MONITOR bus. The following section describes the
MONITOR bus operation, which allows you to adjust
the overall tone and volume, and specify the mix level
of the built-in effects.
26
24
EFX TO MON - Effe cts Re turn
Control
24
The EFX TO MON control is used to adjust the
level of the effect sound being sent back from
the built-in digital effect to the MONITOR bus.
This allows you to hear the DSP effects in your
monitor speakers.
25
28
27
MASTER - Volume Control
25
The MASTER level control is the overall con-
trol for the MONITOR bus. The MONITOR
level affects both the MONITOR bus signal
which is sent to the monitor speakers and the
line level signal which is sent from the AUX 1
SEND jack.
26
27
Output Leve l Me te r
The OUTPUT LEVEL METER allows you to monitor the level of the signal which is being sent to the AUX
1 SEND jack and MONITOR POWER AMPLIFIER.
NOTE: To avoid distortion, adjust the MASTER level control so that the 0 indicator LED lights occasionally.
Graphic Equalize r
The XM910’s 10-band Graphic Equalizer allows you to contour the frequency response of the MONITOR
bus signal, providing a maximum of 12dB of cut/boost for each frequency band. This is an especially useful
tool for cutting frequencies that cause annoying feedback. The frequency response is flat when the sliders
are in the center position. Moving a slider in the positive direction will boost that frequency by as much as
12dB, and moving the slider in the negative direction will cut that frequency by up to 12dB. Once you set a
frequency response curve using the Graphic Equalizer, the EQ curve is applied to both the MONITOR bus
signal that is sent to the monitor speakers, and the line level signal which is sent from the AUX 1 SEND
jack.
28
Low Cut - s witch
The MASTER / MONO output of the XM910’s includes a LOW CUT (or high pass) filter which rolls off the
low frequencies from 75Hz and below at the rate of 18dB per octave. The LOW CUT filter allows you to
remove the lower frequencies that you sometime just don’t want to pick up. For example, when you are
using the XM910 mostly for vocals, you may not want to pick up the low end generated by other live instru-
ments like bass and low-end synthesizers played out of back-line amplifiers on stage. In many live sound
applications, the LOW CUT filter is especially useful for removing stage rumble.
11
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Controls and Functions
DJ MIXER SECTION
Offering extreme flexibility for today’s working musicians, the XM910 incorporates an on-board, two channel
stereo DJ mixer. The following section details the control functions used in the XM910’s DJ mixers section.
29
DJ Cros s fade r
The XM910 has a built-in DJ mixer, which can
be used to mix line level sources like CD or
tape players. Like other high quality DJ mixers,
the XM910 has a removable crossfader featur-
ing a smooth linear taper. The Crossfader is
used to mix between the CD1 input and the
CD/TAPE 2.
30
CD 1 – Input Leve l Control
The CD 1 input volume control is used to adjust
the volume of the signal connected to the CD 1
input. When using the DJ mixer, or for just play-
ing back a signal from a CD, MP3 player, cas-
sette tape or other stereo device like DVD or
VCR or computer sound card output, use the
CD 1 level control to set the perfect level. Be
sure to set the DJ crossfader all the way to the
left side.
29
31
CD 2 – Input Leve l Control
The CD 2 input volume control is used to adjust
the volume of the signal connected to the CD 2
input. When using the DJ mixer, or for just play-
ing back a signal from a CD, MP3 player, cas-
sette tape or other stereo device like DVD or
VCR or computer sound card output, use the
CD 2 level control to set the perfect level. Be
sure to set the DJ crossfader all the way to the
right side.
31
30
12
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XM910 Input and Output Conne ctions
3
5
6 8
9
1
2
11
12 13
7
4
10
CHANNEL 1– 10 MIC and LINE INPUTS
The XM910’s six input channels each have a LINE level, Hi-Z (High Impedance) input and a MIC level, Low-Z
(Low impedance) input. By using the GAIN control, you can connect a variety of signal sources from micro-
phones to line level devices such as synthesizers, drum machines and direct boxes. Both LINE and MIC inputs
are balanced, with MIC inputs compatible with microphones of output impedance 50-600 Ohms and LINE inputs
compatible with line level devices of 600 Ohms.
NOTE: It is not possible to simultaneously use both the LINE and MIC inputs on the same channel. For each
channel, use only one of the inputs as appropriate for the input source.
LINE - Line Leve l Input
1
Use these inputs to connect high impedance microphones, synthesizers and drum machines. The LINE
inputs have a nominal operating level of -40dBV through - 10dBV.
TRS phone jacks Connector pin-out - Sleeve: Ground, Tip: Hot (+), Ring: Cold (-)
2
MIC - Microphone Input
Use these inputs to connect Low Impedance microphones and low level signals from direct boxes. The MIC
inputs have a nominal operating level of –50dBV through -20dBV. The MIC inputs also feature +48V phan-
tom power, allowing you to use condenser microphones. The Phantom Power is switched on/off simultane-
ously for channels 1 through 6.
XLR Connector pin-out - Pin 1: Ground, Pin 2: Hot (+), Pin 3: Cold (-)
3
4
LINE L / MONO – Le ft Line Input (Ste re o channe ls only)
Channel 7/8 and 9/10 can accept either stereo or mono inputs. For stereo connections, use the LINE L /
MONO to connect the left channel. If you are using the inputs for a mono line input, use the LINE L / Mono
input only so that the signal feeds both the right and left mix bus. Use these inputs to connect high imped-
ance microphones, synthesizers and drum machines. The LINE inputs have a nominal operating level of -
40dBV through - 10dBV.
TRS phone jacks Connector pin-out - Sleeve: Ground, Tip: Hot (+), Ring: Cold (-)
LINE R / MIC - Right Line and Microphone Combination Input (Ste re o channe ls
only)
For the right inputs of the stereo channels, the XM910 incorporates a “combo” connector, which can accept
either an XLR or 1/4-inch connector. These stereo inputs includes an extra mic pre which you can use to
connect Low Impedance microphones and low level signals from direct boxes. The MIC inputs also feature
+48V phantom power, allowing you to use condenser microphones. When connecting a stereo signal, use
the 1/4-inch phone jack located in the center of the combo connector to connect the right line input.
XLR Connector pin-out - Pin 1: Ground, Pin 2: Hot (+), Pin 3: Cold (-)
TRS phone jacks Connector pin-out - Sleeve: Ground, Tip: Hot (+), Ring: Cold (-)
13
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XM910 Input and Output Conne ctions
MASTER SECTION INPUT AND OUTPUT CONNECTORS
The XM910 features several output connectors allowing you to interface a variety of external devices. A stereo
recording device such as a cassette recorder can be connected to the REC OUT jacks, and additional power
amplifiers can be connected to the MONITOR and MAIN output jacks.
EFX RETURN - Le ft and Right Auxiliary Input
5
These two 1/4-inch phone jacks are used to connect the outputs of stereo devices such as external effects
processors.
AUX 2 SEND - Effe cts Output
6
The AUX 2 SEND output is used to interface an external signal processor like a delay or reverb. The signal
present at the AUX 2 SEND output is sent from the EFFECTS bus, which is fed from the AUX 2/ EFX send
on the input channels and the EFX LEVEL send in the Effects section.
7
8
EFX FOOTSWITCH - Foots witch Jack
With a footswitch connected to this jack, you can turn on and off the on-board digital effects by simply step-
ping on the footswitch.
AMP IN - Powe r Amplifie r Le ft and Right Inputs
The Left and Right AMP IN 1/4-inch phone jacks are used to make a direct connection to the XM910’s
internal power amplifiers. You can connect a stereo source like the output from an external mixer here. In
addition, the Left and Right AMP IN jacks can be used combination with the MAIN Left and Right Output
jacks to create an effects loop when connecting an external signal processor to effect the entire system.
For more information on using the AMP IN connectors as an effects loop, see the section, on page 19 of
this manual.
9
MIX OUT - Line Leve l Le ft and Right Main Outputs
The signal present at this connector is the MAIN bus signal, which has passed through the MAIN/ MASTER
level control and the graphic equalizer. The nominal output level is +4dBu and the impedance is100 Ohms.
In addition, the Left and Right AMP IN jacks can be used combination with the MAIN Left and Right Output
jacks to create an effects loop when connecting an external signal processor to effect the entire system.
For more information on using the AMP IN connectors as an effects loop, see the section, on page 19 of
this manual.
10 AUX 1 SEND - Monitor Output
The MONITOR bus signal is present at this connector. The signal is passed through the MONITOR /MAS-
TER level control and graphic equalizer before it reaches the AUX 1 SEND connector. The nominal output
level is +4dBu and the impedance is100 Ohms.
11
12
13
CD 1 IN - Line Leve l CD/ TAPE Input
Used to connect a stereo output device such as cassette recorder or CD player.
CD 2 IN - Line Leve l CD/ TAPE Input
Used to connect a stereo output device such as cassette recorder or CD player.
REC OUT - Re cord Output
The signal present at this connector is the MAIN bus signal before it has passed through the MASTER level
control and graphic equalizer. The nominal output level is -10dBV and the impedance is100 Ohms.
14
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XM910 Input and Output Conne ctions
REAR PANEL
The XM910 contains two mono power amplifiers and depending on the operating mode, the two amplifiers can
be used independently (maximum output 300W + 300W) or in BRIDGE mode (maximum output 900W).
NOTE: Use the MODE switch to select which signal is sent to the speaker output jacks, and to activate BRIDGE mode.
If the two power amplifiers are used for MAINS operation, two speakers can be connected to the AMP 1 A/B
jacks and two more to the AMP 2 A/B jacks, for a total of four speakers.
NOTE: When using the A and B jacks simultaneously, connect 8 through 16 Ohm speakers. In this case, be care-
ful not to connect a speaker to the BRIDGE jack.
The total impedance load for each amplifier must not exceed 4 Ohms, therefore in the example above, one
speaker with an impedance of 8 ohms is connected to each amp’s A and B jacks. (The A/B jacks are wired in
"Parallel", so the total impedance when two 8 Ohm speakers are connected is 4 Ohms.)
If you wish to use two amplifiers independently, let’s say for Main and Monitor operation, but only connect a sin-
gle speaker to the A or B jack, use a 4 through 8 Ohm speaker. Again, the total impedance load for each amplifi-
er must not exceed 4 Ohms, therefore one speaker with an impedance of 8 ohms can be connected to each
amp’s A and B jacks.
If the two amplifiers are used in a BRIDGE mode, only one speaker can be connected to the BRIDGE jack. The
total impedance load while operating in Bridge mode must not be less than 8 Ohms.
If you are connecting a speaker to the BRIDGE jack, use an 8 through 16 Ohm speaker.
CAUTION: When using a bridge connection, do not connect anything to the AMP 1 and AMP 2 jacks. Likewise,
when using the POWER AMP 1 and POWER AMP 2 jacks, do not connect anything to the BRIDGE jack.
14
15
16
14
AMP 1 – Powe re d Spe ake r Outputs
The AMP 1 output has two 1/4-inch phone connectors, which are powered outputs used to connect your
left side main PA speaker when using the XM910 is stereo mode. When operating in MAIN / MONITOR
mode the AMP 1 powered output connectors are used to connect to floor or side fill monitors facing the per-
formers.
BRIDGE – Mono Output conne ctor
15
16
The BRIDGE output has one 1/4-inch phone connector, which is a powered output used to connect one
main PA speaker when using the XM910 in mono BRIDGE mode.
AMP 2– Powe re d Spe ake r Outputs
The AMP 2 output has two 1/4-inch phone connectors, which are powered outputs used to connect your
right side main PA speaker when using the XM910 in stereo mode. When operating in MAIN / MONITOR
mode, the AMP 2 powered output connectors are used to connect left and right side MAIN PA speakers.
15
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XM910 Input and Output Conne ctions
SPEAKER CONNECTION
The XM910’s power amplifier section can be configured to operate several ways depending on the setting of the
power amp MODE switch located on the front panel. This allows you to choose whether you need MAIN plus
MONITOR amplifiers to power your speakers, or if you just need more power for the MAIN speakers. For more
information on the power amp MODE switch, see the section POWER AMP SECTION on page 9 of this manual.
There are three ways in which speakers can be connected to the XM910: A single speaker can be connected to
either the A or B jack of AMP 1 and AMP 2, two speakers can be connected in parallel to both the A and B jacks
of AMP1 and AMP 2, or a single speaker can be connected to the BRIDGE jack (bridge connection). For each of
these, the required speaker impedance will differ.
Refer to the following diagram, and make sure that the speaker impedance is not less than the specified value.
Additional, or alternative amplifiers can be connected to the MAIN MIX OUT and MONITOR AUX 1 SEND jacks
on the front panel.
When connecting two
speakers to POWER AMP
1 and two speaker to
POWER AMP 2, use
speakers with a 8 – 16
ohm impedance rating.
When the POWER AMPS
are in BRIDGE use a
speakers with a 8 – 16
ohm impedance rating.
When connecting one
speaker to POWER AMP 1
and one speaker to
POWER AMP 2, use
speakers with a 4 – 8 ohm
impedance rating.
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BASIC OPERATION
The following section explains the basic operation of the XM910.
CONNECTING MICROPHONES AND INSTRUMENTS
1. Before connecting mics or instru-
ments, make sure that the power
of all your systems components,
including the XM910, is turned off.
Also, make sure that the volume
and gain controls of each channel
of the XM910 and the MASTER
controls of the MAIN and MONI-
TOR section are turned all the way
down.
2. Connect the cables to your micro-
phones and instruments, and
insert the other end of the cable
firmly into the appropriate input on
the XM910.
3. Switch on the power of any periph-
eral devices, and then power up
the XM910.
NOTE: Since the XM910 contains
two power amplifiers, it is important
to remember the Golden Rule of
audio … " LAST ON, FIRST OFF".
Translated, this means that when turning on your system, you should always turn your power amplifiers on
LAST, and when turning your system off, turn your power amps off FIRST. This helps avoid any loud pops
caused by rush current at power up or power down, which can sometimes damage loudspeakers .
4. Set the MASTER control of the MAIN section to the "5" position.
5. While speaking into the mic (or playing the instrument), adjust the channel GAIN control so that the "PEAK"
LED of the channel lights occasionally, then back it down slightly.
6. Slowly adjust the channel VOLUME control until the desired level is reached.
7. If you wish to adjust the tone of each channel, adjust the equalizer controls as desired. You may have to
readjust the channel volume.
8. Use the MAIN section graphic equalizer and MASTER control to adjust the overall volume and tone.
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USING THE DIGITAL EFFECTS
The XM910 features a built-in, high quality, 24 BIT Digital Signal Processor offering studio grade effects. The
DSP features clean Delay, lush Reverbs and multi-effects like Chorus + Delay or Chorus + Reverb. You can add
a broad range of studio quality effects by simply dialing through the 100 presets. The following details the opera-
tion of the internal DSP effects:
1. Connect a mic or instrument to the desired channel, and adjust the volume and
equalizer to your liking.
2. Now select the desired preset using the EFFECTS SELECT switch. Set the DSP
SELECT switch to one of the following 100 effects:
0 - 9
Performance
Hall Reverb
Plate Reverb
Spring Reverb
Echo
Flange + Verb
Chorus + Verb
Echo + Verb
Chorus
10 - 19
20 - 29
30 - 39
40 - 49
50 - 59
60 - 69
70 - 79
80 - 89
90 - 99
Flange
4. Once you have selected the desired effect preset, raise the AUX 2 EFX control on
the channels you wish to apply the digital effect to.
5. Now use the EFX to MAIN/MON knob in the MAIN/MONITOR section to adjust the EFFECTS Return level.
The EFX to MAIN/MON control is the overall level control for the DSP effects processor. If you are not using
the XM910 in MAIN/ MONITOR or BRIDGE mode, be sure to raise the EFX to MAIN/MON control up on both
the MAIN and MAIN/ MONITOR sections so the level of effect is the same in both speakers.
NOTE: If the effect sound is distorted even though the EFX to MAIN/MON is turned down low, lower the AUX 2
EFX controls of each channel.
SENDING AN INDEPENDENT MIX TO THE MONITOR SPEAKERS
The XM910 allows you to operate the power amplifiers in a MAIN/ MONITOR mode. This lets you use one ampli-
fier for speakers facing the audience, and the other amplifier for the monitor speaker facing the musicians.
1. Set the channel MONITOR section and VOLUME control to the "0" position.
2. Raise the AUX 1 MON controls for
the channels that you wish to hear
from the monitor speakers.
NOTE: The MONITOR controls
are not affected by the level
settings of each channel. This
allows you to create a mix for the monitors that is
independent of the MAIN mix.
3. Use the graphic equalizer and MASTER controls of the
MAIN/MONITOR sections to adjust the overall volume
and tone.
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USING AN EXTERNAL EFFECT
If you prefer to use an external device for effects process-
ing, you can easily connect the unit using the XM910 EFX
bus. Follow the simple steps below to interface your
processor:
1. Set the MONITOR section MASTER control to the "0"
position. Press the EXFX BYPASS switch to disable the
internal DSP.
2. Raise the AUX 2 EFX controls for the channels to which
you want the external effect to be applied.
3. Now adjust the EFX LEVEL to about half way.
4. Set the input level of the external effect so that the
sound is not distorted and so that the effect’s input meter
does not indicate a clipped signal.
5. Use the EFX TO MON control to adjust the level of the
effects processed by the external effects device.
USING THE MAIN OUTPUTS AND AMP INPUTS
AS AN EFFECTS LOOP
You can use the XM910’s MAIN Left and Right outputs
along with the Left and Right AMP inputs as a stereo insert
point, or effects loop, for connecting an external signal
processor. This will allow you to apply an effect on the
entire main stereo mix. You may want to use an external
dynamics processor like a compressor. The following sec-
tion details the hook up.
1. Using standard 1/4-inch shielded cables, connect the
MAIN Left and Right outputs to the left and right inputs of
a stereo compressor like a Samson C com 16 or S com
plus.
2. Using standard 1/4-inch shielded cables, connect the left
and right outputs of your compressor to the Left and
Right AMP IN connectors.
3. Now, follow the directions in your compressor users
manual to set the correct gain structure and to adjust the
parameters for compressing your signal.
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USING THE DJ MIXER
The XM910 has an on-board DJ mixer, which you can use for
playing back a CD, Tape or Mini Disk. The DJ mixer section
features 2 CD / TAPE inputs and a removable crossfader. The
crossfader allows you to mix between the CD 1 and CD 2
inputs. When the crossfader is set all the way to the left, CD 1
input is selected. To listen to the CD 2 input, slide the cross
fader all the way to the right side. As you move between the
CD 1 and CD 2 inputs, the mixer will cross-fade the two input
signals. The result is that you are lowering one CD input while
simultaneously raising the other CD input.
1. Turn the CD 1 and CD 2 level controls and the MASTER
level control all the way down.
2. Slide the crossfader all the way to the left to select CD 1
input.
3. Follow the "LAST ON, FIRST OFF" rule and turn on your
peripheral devices and then the power on the XM910.
4. Adjust the MASTER volume control of the MAIN section to
the "5" position.
5. Start playback on the CD, Tape or MD player connected to
CD 1, and use the CD 1 LEVEL control to adjust the level
so that the zero LED of the MAIN section peak level meter
lights occasionally.
CD Player 1
CD Player 2
6. Now, slide the crossfader all the way to the right to select CD2 input.
7. Start playback on the CD, Tape or MD player connected to CD 2, and use the CD 2 LEVEL control to adjust
the level so that the zero LED of the MAIN section peak level meter lights occasionally.
8. Adjust the master volume control to raise the level if necessary.
You can engage the CH 1 – 6 mute switch to turn off the channel 1 - 6 inputs, and still have a live microphone on
channel 7/8 or 9/10 if you need to be the Master of Ceremony and “get the party started right”.
RECORDING YOUR PERFORMANCE FROM THE
XM910
You can record the audio from the XM910’s mixer section
including the MIC, LINE, TAPE IN and AUX inputs to a cas-
sette deck, MD, DAT or any other type of recorder using the
record outputs. Simply connect the XM910’s CD 2/ TAPE OUT
jacks to the input jacks of the recorder as shown in the diagram
below.
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XM910 Sys te m Se t-Ups
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XM910 Sys te m Se t-Ups
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XM910 Wiring Guide
CONNECTING THE XM910
The are several ways to interface the XM910 to support a variety of applications. The XM910 features balanced
inputs and outputs, so connecting balanced and unbalanced signals is possible.
Unbalanced 1/4” Connector
Balanced TRS 1/4” Connector
XLR Balanced Wiring Guide
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Spe cifications
SPECIFICATIONS
Rated Output power
Frequency response
2 X 450W at 4Ω @0.1% THD at 1KHz
20Hz~20KHz+/-0.7dB@1W Output into 8Ω (AMP OUT)
20 Hz~20KHz+/-0.4@+4dB Output into 10kΩ (MAIN OUT,
MONITOR OUT, AUX 2 SEND)
Total Harmonic Distortion
Less than 0.06%@20Hz~20KHz, 75W output into4Ω (AMP
OUT)
Less than 0.1%@20 Hz~20KHz+14dB output into 10KΩ
(MAIN OUT, MON OUT, AUX 2 SEND)HUM & Noise
-121dB
equivalent input noise
(Average, RS+150Ω)
-100dB residual output noise (MAIN OUT, MONITOR OUT, AUX
2 OUT)
(with 22Hz~22KHz BPF)
-79dB (MAIN OUT, MONITOR OUT) Master level control at
maximum, all channel level control at minimum.
-79dB (AUX 2) Master level control at maximum, all channel
level controls at minimum
Maximum Voltage Gain
67dB CH IN (MIC) to AMP OUT
63dB CH IN (MIC) to MAIN OUT, MONITOR OUT
54dB CH IN (MIC) to AUX 2 OUT
30dB CH IN (MIC) to REC OUT
32dB CH IN (LINE) to MAIN OUT, MONITOR OUT
26dB AUX IN to MAIN OUT
24dB TAPE IN to MAIN OUT
Crosstalk 1KHz
70dB adjacent input, 70dB input to output
Input Channel Equalization
HIGH
MID
LOW
12KHz shelving (+/- 15dB Maximum)
2.5KHz peaking (+/- 12dB Maximum)
80Hz shelving (+/- 15dB Maximum)
Meters
9 POINT LED METERS (-20, -15, -10, -7, -4,-2, 0, +2, +4dB)
Graphic Equalizer
Internal DSP Effects
10 bands (30, 63, 125, 250, 500, 1K, 2K, 4K, 8K, 16KHz)
24 BIT - 10 Presets each: 1 - Performance; 2 - Hall Reverb, 3 -
Plate Reverb; 4 - Spring Reverb; 5 - Echo; 6 - Flange +
Verb; 7 - Chorus + Verb; 8 - Echo + Verb; 9- Chorus;
10- Flange
Phantom Power
CLIP Indicators
Foot Switch
+48V
Turn on: THD> 0.1%
DIGITAL EFFECT MUTE: ON/OFF
GENERAL
Power Requirement
110V-240V, 50/60Hz
Power Consumption
Weight
950W, MAX.
40 lbs./18.2Kg
Dimensions
21” (W) x 14” (H) x 13-3/4” (D)
534mm(W) x 356mm(H) x 350mm(D)
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Block Diagram
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Samson Technologies Corp.
575 Underhill Blvd.
P.O. Box 9031
Syosset, NY 11791-9031
Phone: 1-800-3-SAMSON (1-800-372-6766)
Fax: 516-364-3888
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