JBL CSA-2120 Manuel utilisateur
6
2.0 Setup
2.1 Unpacking Your Amplifier
Please unpack and inspect your amplifier for any damage that may have occurred
during transit. If damage is found, notify the transportation company immediately.
Only you can initiate a claim for shipping damage. We will be happy to help
as needed. Save the shipping carton as evidence of damage for the shipper’s
inspection.
We also recommend that you save all packing materials so you will have them if you
ever need to transport the unit. Never ship the unit without the factory pack.
WARNING: Before you start to set up your amplifier, make sure you read and
observe the Important Safety Instructions found at the beginning of this manual.
2.2 Installing Your Amplifier
CAUTION: Before you begin, make sure your amplifier is disconnected from the
power source and all level controls turned completely down (counterclockwise).
To install the amplifier, you can use one of the following approaches:
• Rack mount the amplifier with the rack mounting kit, see Figure 2.2.3 and
Figure 2.2.4.
• Install the amplifer to the wall with the mounting kit, see Figure 2.2.5.
• Stack amps without using a cabinet. For amplifier dimensions, see Figure
2.2.1.
NOTE: When transporting, amplifiers should be supported at front.
7
Solution A: Rack Mounting an Amplifier and CST-2120 Transformer Module
To install an amplifier and a CST-2120 transformer module in your cabinet system,
refer to Figure 2.2.3 and follow the steps below:
1. Align two modules side by side, with the front panel towards the same direction.
2. Connect them with the flat bracket.
3. Attach an angle bracket to each side of the amplifier assembly with screws.
4. Install the amplifier assembly into the cabinet. For details of installation in the
chassis of the cabinet, refer to the user guide of your cabinet.
Figure 2.2.1 Dimensions
Figure 2.2.2 Mounting Kit
long angle bracket
flat bracket
angle bracket
Unit: mm [inches]
Figure 2.2.3 Rack mounting an amplifier and CST-2120 Transformer Module
8
Solution B: Rack Mounting Single Amplifier
To install single amplifier in your cabinet system, refer to Figure 2.2.4 and follow the
steps below:
1. Attach the long angle bracket to one side of the amplifier that you need to
reserve as dummy module with screws.
2. Attach an angle bracket to the side of the long angle bracket.
3. Attach an angle bracket to another side of the amplifier with screws.
4. Install the amplifier assembly into the cabinet. For details of installation in the
chassis of the cabinet, refer to the user guide of your cabinet.
Solution C: Wall Mounting
To install the amplifier to wall, refer to Figure 2.2.5 and follow the steps below:
1. Attach two angle brackets to both sides of the amplifier with screws.
2. Install the amplifier assembly to a flat and secure position on the wall (for drywall
it is recommended to use #12 x 1-1/2 in. or M6 x 40mm screws into a #12-14 x
1 – ½ in. anchor.) A minimum clearance of 4” should be provided on all sides of
the assembly to allow for heat dissipation.
Figure 2.2.4 Rack Mounting Single Amplifier
Figure 2.2.5 Wall Mounting
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2.3 Ensuring Proper Cooling
When using an equipment rack, mount units directly on top of each other. DO NOT
block side air vents. The back of the rack should be open.
2.4 Choosing Input Wire and Connectors
We recommend using pre-built or professionally wired balanced line (two-conductor
plus shield) 22-24 gauge cables to connect the amplifier balanced input by using
shipped two 3-pin Euroblock connectors, see Figure 2.4. Unbalanced lines may be
used, but may result in hum or RF noise very long cable runs.
You can also use RCA connectors to connect audio devices, for example, CD/DVD
player. However, do not use both Euroblock and RCA audio input connectors on a
single channel at the same time.
NOTE: Custom wiring should only be performed by qualified personnel.
Figure 2.4 Input Wiring
Note: Do not use both Euroblock and RCA audio input connectors on a single
channel at the same time.
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2.5 Output Wiring
To drive distributed speaker systems designed to operate at 70V or 100V, connect
the amplifier to a CST-2120 transformer module with the jumper cable that shipped
with the CST-2120 transformer module, see Figure 2.5.1.
JBL recommends using pre-built or professionally wired, high-quality, two-conductor,
heavy gauge speaker wire. Speakers wires should be twisted cable, if possible. To
prevent the possibility of short-circuits, the wires should be stripped back no greater
than 6 mm (1/4 inch), see Figure 2.5.2.
Suggested below are guidelines to select the appropriate size of wire based on the
distance from amplifier to speaker. Check with local code as this may vary.
Distance Wire Size
Up to 25 ft. (7.6m) 16AWG
26-40 ft. (7.9-12.2m) 14AWG
Figure 2.5.1 Connecting To a CST-2120 Transformer Module
NOTE: If driving a 70V or 100V distributed speaker system, use the optional CST-
2120 transformer module (see Appendix A).
TO
Speaker
TO
Speaker
Figure 2.5.2 Connecting to Speakers
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