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- Operation Manual
JBL CSA-2120 Operation Manual
Summary of CSA-2120
Page 1
Csa-2120 cst-2120 public address system operation manual csa-2120 amplifier & cst-2120 transformer cs commercial solution series.
Page 2: Contents
2 this manual does not include all of the details of design, production, or variation of the equipment. Nor does it cover every possible situation which may arise during installation, operation or maintenance. The information provided in this manual was deemed accurate as of the publication date. Ho...
Page 3: Important Safety Information
3 important safety information warning for your protection read the following: keep these instructions heed all warnings follow all instructions the apparatus shall not be exposed to dripping or splashing liquid and no object filled with liquid, such as vases, shall be placed on the apparatus clean ...
Page 4: Important Safety Information
4 important safety information electromagnetic compatibility this device complies with part 15 of the fcc rules and the product specifications noted on the declaration of conformity. Operation is subject to the following two conditions: • this device may not cause harmful interference, and • this de...
Page 5
5 ec - declaration of conformity brand: jbl equipment type: amplifier and transformer model names: csa-2120, cst-2120 we, harman international, declare under our sole responsibility that the product, to which this declaration relates, is in conformity with the following standards. Due to line curren...
Page 6: 1.0 Welcome
6 1.0 welcome the jbl ® csa-2120 power amplifier is a professional tool designed and built for installed sound applications. The amplifier is a two-channel model providing simple analog amplification, with a switch-mode universal power supply. The amplifier includes a rack mounting kit. A transforme...
Page 7: 2.0 Setup
7 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 s...
Page 8
8 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 ...
Page 9
9 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 sid...
Page 10: 2.3 Ensuring Proper Cooling
10 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 shie...
Page 11: 2.5 Output Wiring
11 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...
Page 12
12 2.6 wiring your audio system typical input and output wirings are shown in figure 2.6. Inputs: connect input wiring for both channels using either the rca or the euroblock input for each channel. Outputs: maintain proper polarity (+/–) on output connectors. Connect channel 1 loudspeaker’s positiv...
Page 13: 2.7 Connecting to Ac Mains
13 2.7 connecting to ac mains connect your amplifier to the ac mains power source (power outlet) with the supplied ac power cord. First, connect the iec end of the cord set to the iec connector on the amplifier; then, plug the other end of the cord set to the ac mains. Warning : the third prong of t...
Page 14: 3.0 Operation
14 3.0 operation 3.1 precautions your amplifier is protected from internal and external faults, but you should still take the following precautions for optimum performance and safety: 1. Before use, your amplifier first must be configured for proper operation, including input and output wiring hooku...
Page 15
15 3.2 front panel controls and indicators a. Level: rotary level control, one per channel. B. Meter group (one per channel): • clip indicator: red led turns at the threshold of audible distortion. • signal indicator: green led flashes wh en a very low-level signal (threshold -40db) is present at in...
Page 16: Features
16 appendix a: optional item - transformer module the rack-mountable jbl commercial ® cst-2120 transformer module provides impedance and voltage matching from the csa-2120 amplifier to drive 70v and 100v distributed speakers systems. This unit allows amplifiers without direct 70v or 100v output capa...
Page 17: Installation
17 installation caution: before you begin, make sure that the amplifier is disconnected from the power source and all level controls are turned completely down (counter- clockwise). 1. If you need to mount the transformer module to rack, use a standard 19-inch (48.3-cm) equipment rack (eia rs-310b) ...
Page 18
18 output power (two channels at 1 khz power, thd+n 4 ohms 120 w 8 ohms 120 w frequency response (1 watt into 4 or 8 ohms): +1/-1 db load impedance : rated for 4 or 8 ohms sensitivity (8 ohms load): 1.4 vrms signal to noise ratio (below rated 8-ohm power at 1 khz, a weighted): >100 db crosstalk (bel...
Page 19
19 appendix d: contact information for additional information, please consult jbl professional customer service, your system installer or retailer. On the world wide web: www.Jblcommercialproducts.Com professional contacts, outside the usa: contact the jbl professional distributor in your area. A co...
Page 20
Part number: 5009280 issue: 01/12 jbl commercial 8760 south sandy pkwy. Sandy, ut 84070 usa (801) 566-8800