Crestron X Series User manual

The Crestron® AMP-X75 is a high performance, space saving, energy
efficient amplifier that’s totally configurable, yet simple to use. Whether
installed in a rack, mounted on a wall, or placed on a table, the AMP-X75
is simple to specify and install in any configuration.
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In the Box
1 AMP-X75, X-Series Amplifier, 75 W
 
Additional Items
4 Screw, 8-32 x 5/16 in., Flat Head, Phillips, Black (2055195)
4 Screw, 6-32 x 3/8 in., Undercut Head, Phillips (2055196)
2 Plate, Joining (2055198)
4 Foot, Adhesive, Black (2055200)
1 Fascia Plate with Tape, Quarter-Width (2058154)
1 Rack Ear, 1U, Quarter-Width (2058155)
1 Fascia Plate with Tape, Half-Width (2058156)
1 Rack Ear, 1U, Half-Width (2058157 )
1 Power cord (2055205)
1 Connector, Speaker (2055206)
2 Connector, Input (2055207)
1 Connector, 2-Pin (2003574)
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Assemble
Prepare for Installation
The amplifier can be installed in a rack, mounted on a wall, or placed on
a table.
Rack Installation
Before an amplifier can be installed in a rack, rack ears must be
attached.
Single Amplifier
1. Remove the protective plastic from the adhesive strip on the rear
side of the fascia plates.
2. Press the fascia plates against the rack ears to attach them.
AMP-X75 QuickStart
X-Series Amplifier, 75 W
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3. Attach the rack ears to the amplifier with the four included
6-32 x 3/8 in. screws.
Ganged Amplifiers
Up to four 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. When ganging together two or three
amplifiers, a combination of quarter-width and half-width rack ears and
fascia plates must be used.
1. Place the amplifiers upside-down and adjacent to each other on a
flat surface.
2. Use a Phillips screwdriver (not included) to gang the amplifiers
together with three joining plates (two are included with each
amplifier) and twelve 8-32 x 5/16 in. screws (four are included with
each amplifier).
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AMP-X75 QuickStart
X-Series Amplifier, 75 W

3. Turn over the amplifier assembly and attach the rack ears to each
side of the amplifier assembly with six 6-32 x 3/8 in. screws (four are
included with each amplifier).
Surface Mount
Place the amplifier upside-down on a flat surface and attach the two
included joining plates using the four included 8-32 x 5/16 in. screws (two
screws for each side of the device).
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AMP-X75 QuickStart
X-Series Amplifier, 75 W

Surface Placement
Attach the four included feet if the amplifier is to be placed on a flat
surface such as a table. Install
Once assembled, the amplifier can be installed in a rack, mounted on a
wall, or placed on a table.
Rack Mounting Safety Precautions
Elevated Operating Ambient Temperature: If installed in a closed or
multi-unit rack assembly, the operating ambient temperature of the
rack environment may be greater than the room ambient temperature.
Therefore, consideration should be given to installing the equipment in
an environment compatible with the maximum ambient temperature
(Tma) specified by the manufacturer.
Reduced Airflow: Installation of the equipment in a rack should be such
that the amount of airflow required for safe operation of the equipment
is not compromised.
Mechanical Loading: Mounting of the equipment in the rack should be
such that a hazardous condition is not achieved due to uneven
mechanical loading.
Circuit Overloading: Consideration should be given to the connection of
the equipment to the supply circuit and the effect that overloading of
the circuits might have on overcurrent protection and supply wiring.
Appropriate consideration of equipment nameplate ratings should be
used when addressing this concern.
Reliable Earthing: Reliable earthing of rack-mounted equipment should
be maintained. Particular attention should be given to supply
connections other than direct connections to the branch circuit (e.g., use
of power strips).
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AMP-X75 QuickStart
X-Series Amplifier, 75 W

Electrical Connection:
“This product must be connected to an earthed mains socket-outlet.”
Finland: “Laite on liitettävä suojamaadoituskoskettimilla varustettuun
pistorasiaan.”
Norway: “Apparatet må tilkoples jordet stikkontakt.”
Sweden: “Apparaten skall anslutas till jordat uttag.”
Denmark: “Apparatets stikprop skal tilsluttes en stikkontakt med jord
som giver forbindelse til stikproppens jord.”
This symbol indicates a potential shock hazard.
This equipment is not suitable for use in locations where children are
likely to be present.

CAUTIONS:
lDo not touch uninsulated parts of terminals and bare wiring.
Touching uninsulated terminals or wiring may result in an
unpleasant sensation.
lDo not connect any equipment that has a direct connection to
mains circuitry to audio inputs or outputs. All mains supplied
equipment connected to the product must have an approved safety
barrier.
Mount into a Rack
Each rack mounting configuration for the amplifier will occupy 1 RU of
rack space. Mount the configuration with the rack ears attached into
the rack using four mounting screws (not included).
Mount on a Flat Surface
Using two anchors (not included) and two mounting screws (not
included), mount the device onto a flat surface such as a wall.
NOTE: Be sure to mount the amplifier on a flat surface with the rear
panel facing upwards.
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AMP-X75 QuickStart
X-Series Amplifier, 75 W

Place on a Flat Surface
Place the amplifier on a flat surface such as a table.
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 connections for shorts and frayed wiring at all the
input/output connectors.
lFor terminals that have no conductive parts accessible after wiring
is installed, refer to the wiring instructions.
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 of 41 to 104°F (5° to
40°C).
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AMP-X75 QuickStart
X-Series Amplifier, 75 W

AMP-X75 QuickStart
X-Series Amplifier, 75 W
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Speaker Mode Selection Switch
The AMP-X75 can be configured to work with 4 Ω and 8 Ω (low
impedance/LoZ) loads or constant voltage (high impedance) 70V/100V
loads.
lLoZ: Set the switch to LoZ to use the amplifier with 4 Ω or 8 Ω low
impedance loudspeakers.
l70V: Set the switch to 70V to use the amplifier with a 70V constant
voltage load.
l100V: Set the switch to 100V to use the amplifier with a 100V
constant voltage load.
NOTE: Only Gain Control CH1 is active while in 70V, 100V, or BRIDGE
mode.
LoZ Mode Selection Switch
When operating in LoZ mode, the AMP-X75 outputs can operate in
stereo, as summed outputs or as a bridged output. Set the LoZ Mode
selection switch to the desired setting and connect the outputs as
required.
lSTEREO: When set to STEREO, the input signals received on inputs
CH1 and CH2 are sent to their respective outputs. Gain controls 1 and
2 are independently adjustable, respective to the output channel.
lSUM: When set to SUM, input signals sent to CH1 IN and CH2 IN are
summed and sent to outputs CH1 and CH2. Gain controls 1 and 2 are
independently adjustable, respective to the output channel.
lBRIDGE: When set to BRIDGE, CH1 IN and CH2 IN are summed
together and output is bridged. Gain control CH1 is adjustable and
controls the level of the bridged output.
Input Wiring
Balanced and Unbalanced Audio
The AMP-X75 can receive balanced audio through the terminal block
connector and unbalanced audio through the terminal block connector
or the 3.5 mm TRS connector. Refer to the following diagrams when
wiring the terminal block connectors.
Mono and Stereo Input
The AMP-X75 can be wired for mono and stereo inputs.
AMP-X75 QuickStart
X-Series Amplifier, 75 W
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AMP-X75 QuickStart
X-Series Amplifier, 75 W
Signal Flow Diagram
Refer to the following diagram for details on stereo, summed, bridged, and Hi-Z signal flow.
Output Wiring Options
The AMP-X75 can be configured for low impedance (LoZ) stereo or sum operation over two channels, mono bridged operation over one channel, or
high impedance (70V or 100V) operation over one channel. Refer to the following diagrams for details.
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2 Channel up to 35 W Each Output (Low Impedance)
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AMP-X75 QuickStart
X-Series Amplifier, 75 W