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JBL Professional CSA140Z Power Amplifier Operation Manual

JBL Professional CSA140Z Power Amplifier featured

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JBL Professional CSA140Z Power Amplifier

JBL Professional CSA140Z Power Amplifier

IMPORTANT SAFETY INFORMATION

NOTICE FOR CUSTOMERS IF YOUR UNIT IS EQUIPPED WITH A POWER CORD.

WARNING
THIS APPLIANCE SHALL BE CONNECTED TO A MAIN SOCKET OUTLET WITH A PROTECTIVE EARTHING CONNECTION.

The cores in the mains lead are colored by the following code: GREEN and YELLOW – Earth BLUE – Neutral BROWN – Live As the colors of the cores in the mains lead of this appliance may not correspond with the colored markings identifying the terminals in your plug, proceed as follows:

  • The core which is colored green and yellow must be connected to the terminal in the plug marked with the letter E, or with the earth symbol, or colored green, or green and yellow.
  • The core which is colored blue must be connected to the terminal marked N or colored black.
  • The core which is colored brown must be connected to the terminal marked L or colored red.

WARNING
If the ground is defeated, certain fault conditions in the unit or in the system to which it is connected can result in full line voltage between the chassis and the earth’s ground. Severe injury or death can then result if the chassis and earth ground are touched simultaneously.

The symbols shown above are internationally accepted symbols that warn of potential hazards with electrical products. The lightning flash with an arrow point in an equilateral triangle means that there are dangerous voltages present within the unit. The exclamation point in an equilateral triangle indicates that the user must refer to the owner’s manual.

These symbols warn that there are no user-serviceable parts inside the unit. Do not open the unit. Do not attempt to service the unit yourself. Refer all servicing to qualified personnel. Opening the chassis for any reason will void the manufacturer’s warranty. Do not get the unit wet. If the liquid is spilled on the unit, shut it off immediately and take it to a dealer for service. Disconnect the unit during storms to prevent damage.

Welcome

The JBL® Commercial Series of Amplifiers is a professional tool designed and built for Installed sound applications. There are both single-channel and two-channel models. They provide amplification with a choice of low impedance, 70V, or 100V outputs. The product includes a rack mounting kit for installations to a cabinet. The system can be easily expanded with additional JBL Commercial Series products. Provisions are included for a remote volume control using the JBL CSR-V control module.

Features

  • 1 or 2 channel outputs
  • Integrated Output Transformer to drive 70V or 100V speaker systems
  • Ideal for commercial and industrial use
  • The system may be expanded by adding JBL Commercial Series Mixers and mixer amplifiers.
  • Euro-block type mic/line input connectors and output connectors
  • Independent Bass and Treble controls for each output channel
  • Remote volume control capability using JBL CSR-V module and standard Ethernet cable
  • Utilizes Crown’s DriveCoreTM technology providing excellent audio performance with high efficiency
  • 3-Year Warranty*

Warranty is only valid within the United States of America. For information on Warranty outside of the U.S.A., please contact your local distributor.

Front Panel Controls and Indicators
Figure 1.2 Front View of Single Channel Model.

JBL Professional CSA140Z Power Amplifier 1

  • Output Volume Control
  • Power Switch
  • The illuminated ring around the output volume control will light green with signal presence while red indicates clipping, i.e. the signal has reached the threshold of audible distortion.
  • Tone Controls – Bass and Treble potentiometers on each output channel
  • Illuminated ring around the power switch. Green indicates that the unit is connected to the AC mains and is in standby or sleep mode. Blue indicates that the unit is on and in normal operating mode.

Rear Panel Controls and Connectors
Figure 1.3 Rear View – CSA 1120Z

JBL Professional CSA140Z Power Amplifier 2

  • AC Power Inlet – Detachable IEC
  • Amplifier Output Connector
  • Hi-Z Switch – Enables the 70V and 100V outputs and activates the 70Hz high pass filter
  • Dual RCA Input Connector – Stereo, unbalanced sources will be summed together (Ch2-4)
  • Audio Input Connector – 3-pin Euro-block connector, balanced input (Ch2-4)
  • Sleep Disable Switch – Disables the Sleep mode if you don’t want the unit to go into sleep mode after 2 hours with no input signal.
  • Remote volume connector – RJ-45 style connector to connect to JBL CSR-V control module

Setup

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.

Installing Your Amplifier

CAUTION
Before you begin, make sure your amplifier is disconnected from the power source and all level controls are 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 2.2.2.
  • Stack amps without using a cabinet. Rubber feet are included and can be attached to the underside of the chassis. For amplifier dimensions, see Figure 2.2.1.
  • We recommend that any sensitive equipment be located at least 8 inches (20cm) away from the amplifier.

Figure 2.2.1 Dimensions

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Figure 2.2.2 Mounting Kit

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Figure 2.2.3 Rack Mounting Two Units

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To install two units in your cabinet system, refer to Figure 2.2.3 and follow the steps below:

  1. Align two modules side by side and upside down with the front panel in the same direction.
  2. Connect them with the flat bracket using the screws provided.
  3. Attach the front angle brackets to each side of the front of the amplifier assembly using the screws provided.
  4. Attach the rear flat brackets to each side of the rear of the amplifier assembly with the screws provided.
  5. Install the assembly into the cabinet using the rack mount screws through the front angle brackets. For details of installation in the chassis of the cabinet, refer to the user guide of your cabinet.
  6. Align the rear angle brackets with the proper holes at the rear of the cabinet and attach using rack mount screws.
  7. With the rear angle brackets to the outside of the flat brackets, attach them each using a screw passing through two washers, the rear flat bracket, and the rear angle bracket as shown in the figure.

Figure 2.2.4 Rack Mounting A Single Unit

JBL Professional CSA140Z Power Amplifier 6

To install a single unit, refer to Figure 2.2.4 and follow the steps below:

  1. Determine which side of the rack opening will be used for the amplifier and attach the long-angle bracket to the other side at the front of the amplifier using the screws provided.
  2. Attach one of the front angle brackets to the other side of the assembly, as shown in the diagram, with the screws provided.
  3. Install the assembly into the cabinet using the rack mount screws through the front angle brackets. For details of installation in the chassis of the cabinet, refer to the user guide of your cabinet.

Ensuring Proper Cooling
When using an equipment rack, keep a minimum space of 4 inches (10cm) from the top surface of the unit. Close any open spaces in the rack with blank panels. DO NOT block any air vents. The side walls of the rack should be a minimum of 2 inches (5 cm) from the amplifier sides. The back of the rack should be open.

Choosing Input Wire and Connectors
We recommend using prebuilt or professionally wired balanced line (two-conductor plus shield) 22-24 gauge cables to connect the amplifier balanced input by using the included Euro-block connectors, see Figure 2.4. Unbalanced lines may be used, but may result in hum or RF noise for very long cable runs. You can also use RCA connectors to connect audio devices, for example, CD/DVD players. However, do not use both Euro-block and RCA audio input connectors on a single channel at the same time.

Figure 2.4 Input Wiring

EUROBLOCK CONNECTORS

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RCA CONNECTORS

JBL Professional CSA140Z Power Amplifier 8

Output Wiring and Connectors
To drive distributed speaker systems designed to operate at 70V or 100V, connect to the corresponding output terminals. JBL recommends using prebuilt or professionally wired, high-quality, two-conductor, heavy gauge speaker wire. Speaker 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. Suggested below are guidelines for selecting the appropriate size of wire based on the distance from the amplifier to the speaker. Check with the 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 Output Wiring

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Figure 2.6 Wiring Audio System

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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
You may use either low-impedance or high-impedance speakers.

Always be sure to maintain the proper polarity when wiring speakers. Impedance Speakers should be driven using the +/- pins of the amplifier output connector. The minimum impedance an amplifier channel can drive is 4 Ohms. Therefore, you can connect up to four 16 Ohm speakers, two 8 Ohm speakers, or one 4 Ohm speaker to an amplifier output channel.

High Impedance Speakers should be driven using the appropriate (70V or 100V) pin to the speaker (+) and the COM pin to the speaker (-) of the amplifier output connector. The minimum impedance that can be driven from each output is provided in the Appendix Note that the HI-Z switch must be ON to provide audio to the high-impedance outputs.

WARNING
Do not connect to both low-impedance speakers and high-impedance speakers from the same audio output channel.

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. When properly connected to a live power source, the power ring should illuminate with a green color.

WARNING
The third prong of this connector (ground) is an important safety feature.

Do not attempt to disable this ground connection by using an adapter or other methods. Amplifiers don’t create energy. The AC mains voltage and current must be sufficient to deliver the power you expect. You must operate your amplifier from an AC mains power source with not more than a 10% variation above or below the specified line voltage and within the specified frequency range indicated on the back panel of the amplifier. If you are unsure of the output voltage of your AC mains, please consult your electrician.

Protecting Your Speakers

It’s wise to avoid clipping the amplifier signal. Not only does clipping sound bad, but it can damage high-frequency drivers. The built-in clip limiter prevents clipping. Also, avoid sending strong subsonic signals to the amplifier. High-level, low-frequency signals from breath pops or dropped microphones can blow out drivers. You can switch to the HI-Z mode which, in addition to switching in the output transformers for 70V and 100V speakers, activates the high-pass filter. The filter prevents potentially damaging subsonic signals from going to the amplifier by eliminating signals below 70Hz.

Startup Procedure

Use the following procedure when first turning on your amplifier:

  1. Turn down the level of your audio source.
  2. Turn down the level controls of the amplifier.
  3. Power up the amplifier. The Power ring should change from green to blue.
  4. Turn up the level of your audio source to an optimum level.
  5. Turn up the Level controls on the amplifier until the desired loudness or power level is achieved.

If you ever need to make any wiring or installation changes, don’t forget to disconnect the power cord.

Operation

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 hookup. Improper wiring can result in serious operating difficulties. For information on wiring and configuration, please consult the Setup section of this manual.
  2. Use care when making connections, selecting signal sources, and controlling the output level.
  3. Always be sure to have all levels at a minimum when connecting or disconnecting audio sources from the inputs. Failure to do so may cause the amplifier or speaker to go into a protection mode or even cause damage.
  4. ARNING: Never connect the output to a power supply, battery, or power main. Electrical shock may result.
  5. Tampering with the circuitry, or making unauthorized circuit changes may be hazardous and invalidate all agency listings.
  6. Do not operate the amplifier with the red Clip LEDs constantly flashing.
  7. Do not overdrive the mixer, which will cause the clipped signal to be sent to the amplifier. Such signals will be reproduced with extreme accuracy, and loudspeaker damage may result.
  8. Do not operate the amplifier with less than the rated load impedance. Due to the amplifier’s output protection, such a configuration may result in premature clipping and speaker damage.
  9. Use the amplifier in a well-ventilated environment and do not use it in ambient temperature conditions over 40°C. Failure to do so will result in the auto disconnection from the power supply, and the overheat auto protection function will be activated. The power indicator will become green and there will not be any audio signal coming out of the amplifier. In this case, turn down the volume to the minimum, and the amplifier will soon resume working. When the amplifier returns to normal temperature the power indicator will return to blue and you may turn the volume up to a safe level.
  10. If the line voltage to the amplifier is too low, the low voltage protection function will be activated. The power light ring will change from blue to green.

Hi-Z Switch
When this switch is in the “OFF” position, the amplifier is configured to drive low-impedance speakers, (4 Ohms, minimum) The Hi-Z switch will switch in the built-in output transformer allowing the unit to drive 70V or 100V speaker systems directly when connected to the appropriate output terminals. As an added feature when driving the high-impedance speakers, the system automatically switches in a 70Hz high pass filter.

Remote Volume Control
Remote volume control can be implemented using a CSR-V controller connected via an Ethernet cable to the RJ45 connector on the back panel. For the CSA 240Z, CSA 280, Z, and CSA 2120Z, there are two connectors, one for each amplifier output.

Sleep Mode
To save energy, the unit is designed to go into sleep mode after approximately 2 hours of operating with no signal at any of the inputs. Return of signal (-36dBu) to any input will wake the unit from its slumber. The sleep mode can be disabled by activating the Sleep Disable switch on the rear panel.

Troubleshooting

  • CONDITION No power to the amplifier so the power ring is not illuminated.
    • POSSIBLE REASON The amplifier is not plugged into the power receptacle

  • CONDITION No sound or low sound.
    • POSSIBLE REASON The input signal is not present or at a very low level.
    • POSSIBLE REASON The Master Volume control is turned down.
    • POSSIBLE REASON A CSR-V is connected and turned down.
    • POSSIBLE REASON The Hi-Z switch is OFF while using the 70V or 100V outputs.
    • POSSIBLE REASON The power switch is OFF. (Note that while plugged in, the amplifier will be in standby mode and the power ring will be green until the power switch is activated and the power ring will turn blue.)

  • CONDITION Distorted sound.
    • POSSIBLE REASON The input signal level is too high. Please turn down the input level controls. Note that the amplifier should not be operated at a level that allows the clip indicator to be constantly ON.
    • POSSIBLE REASON Master Volume is too high.

Appendix A

Target Performance Specifications.

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JBL Professional CSA140Z Power Amplifier 12
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Appendix B

Contact Information

For additional information, please consult JBL Professional Customer Service, your system installer, or your retailer.

Professional Contacts, Outside the USA
Contact the JBL Professional Distributor in your area. A complete list of JBL Professional international distributors is provided at our U.S.A.

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FAQS About JBL Professional CSA140Z Power Amplifier

What is the power output of the JBL Professional CSA140Z amplifier?

The JBL Professional CSA140Z typically delivers up to 140 watts of power per channel into 4 or 8 ohms, providing ample power for various sound reinforcement applications.

Is the JBL Professional CSA140Z suitable for commercial installations?

Yes, the JBL Professional CSA140Z is designed for commercial and professional audio installations, including restaurants, retail stores, conference rooms, and more.

What are the input options for the JBL Professional CSA140Z amplifier?

The JBL Professional CSA140Z typically features a variety of input options, including balanced XLR and unbalanced RCA inputs, providing flexibility for connecting to different audio sources.

Does the JBL Professional CSA140Z have built-in signal processing features?

Yes, the JBL Professional CSA140Z typically includes built-in signal processing capabilities such as EQ adjustments and limiting to optimize audio performance and protect connected speakers.

Is the JBL Professional CSA140Z rack-mountable?

Yes, the JBL Professional CSA140Z is typically designed to be rack-mountable, allowing for easy integration into existing audio setups and installations.

Does the JBL Professional CSA140Z have built-in fan cooling?

Yes, the JBL Professional CSA140Z typically features a fan cooling system to ensure reliable operation and prevent overheating during prolonged use.

What is the weight and size of the JBL Professional CSA140Z amplifier?

The weight and size of the JBL Professional CSA140Z can vary, but it is typically designed to be compact and lightweight for easy installation and transportation.

Does the JBL Professional CSA140Z support bridged mode operation?

Yes, the JBL Professional CSA140Z typically supports bridged mode operation, allowing users to combine the power output of two channels for increased output power to a single speaker or subwoofer.

What are the protection features of the JBL Professional CSA140Z amplifier?

The JBL Professional CSA140Z typically includes various protection features such as short circuit protection, thermal protection, and DC offset protection to safeguard the amplifier and connected speakers from damage.

What is the warranty coverage for the JBL Professional CSA140Z amplifier?

The warranty coverage for the JBL Professional CSA140Z amplifier typically varies depending on the region and retailer, but it usually includes a limited manufacturer’s warranty to protect against defects in materials and workmanship.

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