Bogen CC4021 40W Amplifier Instruction Manual

1. Introduction

Thank you for choosing the Bogen CC4021 40W Amplifier. This manual provides essential information for the safe and efficient operation of your amplifier. Please read these instructions thoroughly before installation and use, and retain them for future reference.

The Bogen CC4021 is a 40-watt amplifier designed for various audio applications, featuring two inputs and level control. It is engineered for reliable performance and clear sound reproduction.

2. Important Safety Information

WARNING: To reduce the risk of fire or electric shock, do not expose this appliance to rain or moisture. Do not remove the cover. No user-serviceable parts inside. Refer servicing to qualified service personnel.

• Read all instructions before operating the appliance.
• Keep these instructions for future reference.
• Heed all warnings on the appliance and in the operating instructions.
• Follow all instructions.
• Do not use this apparatus near water.
• Clean only with a dry cloth.
• Do not block any ventilation openings. Install in accordance with the manufacturer's instructions.
• Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
• Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles, and the point where they exit from the apparatus.
• Only use attachments/accessories specified by the manufacturer.
• Unplug this apparatus during lightning storms or when unused for long periods of time.
• Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.

Proposition 65 Warning: This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

3. Product Overview

The Bogen CC4021 amplifier is designed for robust audio performance. Key features include:

• 40-watt output for clear and strong sound.
• Two independent input channels for versatile connectivity.
• Adjustable input level controls.
• Bass and Treble tone controls for sound customization.

Front Panel Controls and Indicators

Figure 3.1: Front view of the Bogen CC4021 amplifier. This image displays the Input 1 and Input 2 level controls, Bass and Treble tone controls, and the Power switch. It also shows the Peak, Signal, and Power indicator lights.

1. Input 1 Level Control: Adjusts the volume for Input 1.
2. Input 2 Level Control: Adjusts the volume for Input 2.
3. Bass Control: Adjusts the low-frequency response (-12 to +12).
4. Treble Control: Adjusts the high-frequency response (-12 to +12).
5. Peak Indicator: Illuminates when the audio signal is clipping or nearing distortion.
6. Signal Indicator: Illuminates when an audio signal is present.
7. Power Indicator: Illuminates when the unit is powered on.
8. Power Switch: Turns the amplifier on or off.

Rear Panel Connections

Figure 3.2: Rear view of the Bogen CC4021 amplifier. This image shows the speaker output terminals (COM, 4Ω, 25V, 70V), AC power inlet, RCA inputs (Input 4, Rec Out), and Input 1 terminal block with Line/Mic/Phantom Power switch and Mute Send switch.

1. Speaker Output Terminals: Connections for speakers (COM, 4Ω, 25V, 70V). Ensure correct impedance matching.
2. AC Power Inlet: Connects to the main power supply using the provided power cord.
3. Input 4 (RCA): Unbalanced stereo input for line-level audio sources.
4. REC OUT (RCA): Unbalanced stereo output for recording or connecting to another amplifier.
5. Input 1 Terminal Block: Balanced input for Line or Microphone sources.
6. Line/Mic/Phantom Power Switch (Input 1): Selects input type and enables/disables phantom power for microphones.
7. Mute Send Switch: Controls the mute function for external devices.

4. Setup and Installation

4.1 Unpacking

Carefully unpack the amplifier and inspect it for any signs of damage. Retain the packaging materials for future shipping or storage.

4.2 Placement

Place the amplifier on a stable, flat surface. Ensure adequate ventilation around the unit to prevent overheating. Do not place it near heat sources or in direct sunlight.

4.3 Connecting Speakers

Connect your speakers to the appropriate output terminals on the rear panel (COM, 4Ω, 25V, or 70V). Ensure that the speaker impedance and voltage rating match the amplifier's output to prevent damage. For 25V/70V systems, ensure proper transformer taps are used on the speakers.

4.4 Connecting Audio Sources

• Input 1: For balanced line-level or microphone sources. Use the terminal block and set the Line/Mic/Phantom Power switch accordingly. If using a condenser microphone, enable phantom power.
• Input 2 (RCA): For unbalanced line-level audio sources. Connect your device (e.g., CD player, media player) using RCA cables.

4.5 Power Connection

Connect the supplied AC power cord to the AC Power Inlet on the rear panel and then to a suitable wall outlet. Ensure the power switch on the front panel is in the OFF position before connecting to power.

5. Operating Instructions

5.1 Powering On/Off

1. Ensure all connections are secure.
2. Turn down the Input 1 and Input 2 level controls to their minimum settings.
3. Press the Power switch on the front panel to turn the amplifier ON. The Power indicator light will illuminate.
4. To turn OFF, press the Power switch again.

5.2 Adjusting Volume

Gradually increase the Input 1 or Input 2 level control for the active audio source until the desired volume is achieved. Monitor the Signal and Peak indicators:

• The Signal indicator should light up when audio is present.
• The Peak indicator should only flash occasionally during the loudest parts of the audio. If it stays lit constantly, reduce the input level to prevent distortion and potential speaker damage.

5.3 Tone Control

Use the Bass and Treble controls to adjust the tonal characteristics of the audio output. Turn clockwise to boost frequencies and counter-clockwise to cut them. Start with the controls at the '0' (center) position for a flat response.

6. Maintenance

• Cleaning: Disconnect the power cord before cleaning. Use a soft, dry cloth to wipe the exterior of the amplifier. Do not use liquid cleaners or aerosols.
• Ventilation: Ensure that the ventilation openings are not blocked by dust or debris. Periodically check and clean if necessary.
• Storage: If storing the unit for an extended period, disconnect it from power and store it in a cool, dry place, preferably in its original packaging.

7. Troubleshooting

If you experience issues with your Bogen CC4021 amplifier, refer to the following common problems and solutions:

• No Power:
  • Check if the power cord is securely connected to both the amplifier and the wall outlet.
  • Verify that the wall outlet is functional.
  • Ensure the front panel Power switch is in the ON position.
• No Sound Output:
  • Confirm that the audio source is playing and connected correctly to the amplifier's inputs.
  • Check that the Input level controls on the front panel are turned up.
  • Verify speaker connections and ensure they are securely attached to the correct terminals.
  • Ensure the Line/Mic/Phantom Power switch for Input 1 is set correctly for your source.
• Distorted Sound:
  • Reduce the Input level controls. If the Peak indicator is constantly lit, the signal is too high.
  • Check the audio source for distortion.
  • Ensure speaker impedance matches the amplifier output.
• Hum or Noise:
  • Check all audio cables for secure connections and damage.
  • Try using different cables or audio sources to isolate the problem.
  • Ensure proper grounding of all connected equipment.

If the problem persists after trying these steps, please contact Bogen technical support.

8. Specifications

9. Warranty Information

Bogen products are designed and manufactured to high quality standards. This product is covered by a limited warranty against defects in materials and workmanship under normal use. The specific terms and duration of the warranty may vary by region and product. Please refer to the official Bogen website or contact customer support for detailed warranty information applicable to your purchase.

Retain your proof of purchase for warranty service.

10. Customer Support

For technical assistance, service, or further information regarding your Bogen CC4021 amplifier, please contact Bogen customer support:

• Website: Visit the official Bogen Communications website for FAQs, product documentation, and contact details.
• Phone: Refer to the contact section of the Bogen website for regional support phone numbers.

When contacting support, please have your product model number (CC4021) and serial number ready.