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)

AMP-X300 QuickStart

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

AMP-X300 QuickStart

X Series Amplifier

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

AMP-X300 QuickStart

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).

AMP-X300 QuickStart

X Series Amplifier

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 .

AMP-X300 QuickStart

X Series Amplifier

AMP-X300 QuickStart

X Series Amplifier

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.

AMP-X300 QuickStart

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.

AMP-X300 QuickStart

X Series Amplifier

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

AMP-X300 QuickStart

X Series Amplifier

Bridge and Hi-Z Modes Signal Flow

AMP-X300 QuickStart

X Series Amplifier

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