Crestron X Series User manual

The Crestron® AMP-X300 is a compact, versatile amplifier that can be
configured for use on a flat surface or installed in a 1 RU rack space. The
supplied joining plates enable two amplifiers to be ganged together in a
single rack space.
In the Box
1 AMP-X300, X Series Amplifier
Additional Items
4 Plate, Joining (2055198)
8 Screw, 8-32 x 5/16 in., Flat Head, Phillips, Black (2055195)
4 Screw, 6-32 x 3/8 in., Undercut Head, Phillips (2055196)
4 Foot, Adhesive, Black (2055200)
2 Rack Ear Assembly, 1U, Quarter-width (2055197), includes
Bracket, Rack Ear, 1U (2055199)
2 Connector, Speaker (2055206)
4 Connector, Input (2055207)
1 Power cord (2055205)
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X Series Amplifier

Assemble
Prepare for Installation
The amplifier can be installed in a rack, mounted on a surface, or placed on
a surface.
Rack Installation
Before an amplifier can be installed in a rack, rack ears must be attached.
Single Amplifier
Attach the rack ears to the amplifier with the four included 6-32 x 3/8 in.
screws.
Attach Rack Ear, Single Amp
Ganged Amplifiers
Two amplifiers can be ganged together while occupying only 1 RU of rack
space. When ganged together, the amplifier assembly occupies the entire
width of the rack.
1. Place amplifiers upside-down and adjacent to each other, on a flat
surface.
Position amplifiers together
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2. Use a Phillips screwdriver to gang the amplifiers together with two of
the included joining plates and the eight included 8-32 x 5/16 in. screws.
Attach joining plates
3. Use a wrench or M5.5 socket to remove the nuts from the rack ears.
Remove nuts from rack ear
4. Turn over the amplifier assembly and attach the rack ears to each side
of each amplifier with six 6-32 x 3/8 in. screws.
Attach Rack Ear, Double Amp
Surface Mount
Use the eight included 8-32 x 5/16 in. screws to attach the four joining
plates to the amplifier.
Attach joining plates
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X Series Amplifier

Surface Placement
Attach the four included feet if the amplifier is to be placed on a flat
surface. Install
Once assembled, the amplifier can be mounted into a rack, mounted onto
a flat surface, or placed onto a flat surface.
Mount into a Rack
Each amplifier occupies 1 RU of rack space. Mount the device with the
rack ears attached into the rack using four mounting screws (not
included).
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Mount on a Flat Surface
Use #8, flat head screws and appropriate anchors (not supplied) to
secure the amplifier to a mounting surface.
Mount on a flat surface
Place on a Flat Surface
Place the amplifier on a flat surface.
Connect
Make the necessary connections as called out in the following diagrams.
Connect power last.
CAUTIONS:
lKeep the device unplugged until all of the input and speaker
wiring is complete.
lCheck the speaker wires for shorts and frayed wiring around the
speaker output connectors.
NOTES:
lEnsure that the unit is properly grounded by connecting the
chassis ground lug to an earth ground (building steel).
lTo prevent overheating, do not operate this product in an area
that exceeds the environmental temperature range listed in the
table of specifications on the product web page .
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Speaker Mode Selection Switch
The AMP-X300 can be configured to work with 4 Ω and 8 Ω (low
impedance and/or LoZ) loads or a distributed audio (high impedance
and/or Hi-Z) 70/100 V system.
lLoZ: Set the switch to LoZ to use the amplifier with a 4 Ω or 8 Ω low
impedance loudspeaker.
l70V:Set the switch to 70V to use the amplifier in a 70 V distributed
audio system.
l100V:Set the switch to 100V to use the amplifier in a 100 V distributed
audio system.
LoZ Modes Selection Switch
When operating in LoZ mode, the AMP-X300 outputs can operate in
stereo, as summed outputs or bridged outputs. Set the LoZ Modes
selection switch to the desired setting and connect the outputs as
required.
lSTEREO: When set to STEREO, the input signals received on inputs
CH1,CH2,CH3, and CH4 are sent to their respective outputs. Gain
controls 1, 2, 3, and 4 are all independently adjustable, respective to the
output channel.
lSUM:When set to SUM, input signals sent to CH1 IN and CH2 INare
summed and sent to outputs CH1 and CH2, and input signals sent to
CH3 IN and CH4 IN are summed and sent to outputs CH3 and CH4.
Gain controls 1, 2, 3, and 4 are all independently adjustable, respective
to the output channel.
lBRIDGE:When set to BRIDGE, an input signal sent to CH1 IN is sent
out to the bridged CH1 and CH2 outputs for high-power applications.
An input signal sent to CH3 IN is sent out to the bridged CH3 and CH4
outputs for high-power applications. Gain control 1 adjusts the signal
sent to the bridged CH1 and CH2 outputs while Gain control 3 adjusts
the signal sent to the bridged CH1 and CH2 outputs.
NOTE: When set toBRIDGE,CH1 INand CH2 IN are summed
together. CH3 INand CH4 INare also summed together and gain
controls 2 and 4 are disabled.
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X Series Amplifier

Input Wiring
Balanced and Unbalanced Audio
The AMP-X300 can receive balanced audio through the terminal block
connector and unbalanced audio through the terminal block connector or
the RCA connector. Refer to the following diagrams when wiring the
terminal block connectors.
Mono and Stereo Input
The AMP-X300 can be wired for mono and stereo inputs. Refer to the
following diagrams when connecting audio sources.
NOTE:The RCA and balanced inputs are summed.
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Signal Flow Diagrams
Refer to the following diagrams for details on stereo, summed, bridged,
and Hi-Z signal flows.
Stereo and Sum Modes Signal Flow
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Bridge and Hi-Z Modes Signal Flow
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