1. Introduction
This manual provides detailed instructions for the setup, operation, and maintenance of your Behringer ULTRAGRAPH PRO FBQ3102HD High-Definition 31-Band Stereo Graphic Equalizer. This professional audio device is designed for both live sound and studio applications, offering precise frequency control and an integrated feedback detection system.
Please read this manual thoroughly to ensure proper use and to maximize the performance and longevity of your equalizer.
2. Safety Instructions
Always observe the following safety precautions to prevent electric shock, injury, or damage to the unit:
- Power Supply: Connect the unit only to the specified voltage and frequency. Ensure the power cord is not damaged.
- Grounding: The unit must be properly grounded. Do not defeat the grounding plug.
- Moisture: Do not expose the unit to rain or moisture. Do not place objects filled with liquids on the unit.
- Ventilation: Ensure adequate ventilation. Do not block ventilation openings.
- Heat: Do not place the unit near heat sources such as radiators, heat registers, stoves, or other apparatus that produce heat.
- Servicing: Do not attempt to service this unit yourself. Refer all servicing to qualified service personnel.
- Cleaning: Clean only with a dry cloth.
3. Key Features
The Behringer ULTRAGRAPH PRO FBQ3102HD offers a range of advanced features for precise audio control:
- High-definition 31-band stereo graphic equalizer for professional live and studio applications.
- Revolutionary FBQ Feedback Detection System instantly reveals critical frequencies and can also be used as an audio analyzer.
- Dedicated mono subwoofer output with adjustable crossover frequency.
- Additional sweepable high and low-cut filters for each channel to remove unwanted frequencies (e.g., floor rumble, hiss).
- Provides a smoother finish and longer paper life (Note: This feature bullet appears to be a generic placeholder and may not apply directly to this audio equalizer. Please disregard if irrelevant to the product's function.)
4. Setup
Proper setup is crucial for optimal performance. Follow these steps to integrate the FBQ3102HD into your audio system.
4.1 Unpacking and Placement
Carefully unpack the equalizer and inspect it for any signs of damage. Place the unit in a stable, well-ventilated location, preferably in a standard 19-inch rack.
Figure 1: Front view of the Behringer ULTRAGRAPH PRO FBQ3102HD Graphic Equalizer.
Figure 2: The Behringer ULTRAGRAPH PRO FBQ3102HD, showcasing its dual 31-band layout.
4.2 Audio Connections
The FBQ3102HD features balanced XLR and 1/4" TRS inputs and outputs for each stereo channel. Connect your audio source (e.g., mixing console output) to the INPUTs and your amplifier or next processing unit to the OUTPUTs.
- Inputs: Use balanced XLR or 1/4" TRS cables for optimal signal integrity.
- Outputs: Connect to your power amplifier or other audio equipment using balanced XLR or 1/4" TRS cables.
- Subwoofer Output: The dedicated mono subwoofer output (XLR) allows you to send a low-frequency signal to a subwoofer amplifier. Adjust the crossover frequency using the dedicated control on the rear panel.
Figure 3: Detail of the mono subwoofer output with adjustable crossover frequency control.
4.3 Power Connection
Connect the supplied power cable to the unit's power inlet and then to a suitable AC power outlet. Ensure the power switch is in the OFF position before connecting or disconnecting power.
5. Operating Instructions
The FBQ3102HD provides comprehensive control over your audio frequencies. Familiarize yourself with the front panel controls for effective operation.
5.1 Front Panel Overview
Figure 4: Detailed view of the front panel, showing sliders, meters, and controls.
Each of the two channels features:
- 31 Frequency Sliders: Control individual frequency bands from 20 Hz to 20 kHz.
- Input/Output Level Meters: LED indicators for monitoring signal levels.
- Gain Control: Adjusts the overall output level of the channel.
- FBQ Switch: Activates the Feedback Detection System.
- Low Cut Filter: Sweeps from 25 Hz to 250 Hz to remove unwanted low-frequency rumble.
- High Cut Filter: Sweeps from 2.5 kHz to 25 kHz to remove unwanted high-frequency hiss.
- Range Switch: Selects the boost/cut range for the sliders (±6 dB or ±12 dB).
- Bypass Switch: Bypasses the equalizer section, allowing the signal to pass through unprocessed.
5.2 Basic Equalization
To adjust the frequency response of your audio:
- Ensure all connections are secure and power is on.
- Set the Range switch to ±12 dB for broader adjustments or ±6 dB for finer control.
- Adjust the Gain control to achieve an optimal signal level, indicated by the input/output meters. Avoid clipping (red LEDs).
- Move the 31 Frequency Sliders up or down to boost or cut specific frequencies. Listen carefully to the changes in the audio.
- Use the Low Cut and High Cut filters to remove undesirable frequencies at the extreme ends of the spectrum.
Figure 5: Adjusting a frequency slider to shape the audio response.
5.3 FBQ Feedback Detection System
The FBQ system helps identify and eliminate feedback frequencies:
- Press the FBQ switch to activate the feedback detection mode.
- When feedback occurs, the LEDs above the corresponding frequency sliders will illuminate brightly.
- Gently lower the slider for the illuminated frequency until the feedback is eliminated or significantly reduced.
- Repeat this process for any other feedback frequencies that appear.
Note: While effective, the FBQ system may require the feedback to be audible before detection. Adjusting sliders proactively based on room acoustics can also help prevent feedback.
6. Maintenance
To ensure the longevity and optimal performance of your FBQ3102HD, follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to clean the exterior of the unit. Do not use abrasive cleaners or solvents.
- Ventilation: Regularly check that the ventilation openings are clear of dust and debris.
- Storage: If storing the unit for an extended period, ensure it is in a dry, dust-free environment.
- Slider Care: Keep the sliders free from dust and grime. Avoid excessive force when adjusting them.
7. Troubleshooting
If you encounter issues with your FBQ3102HD, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Power cable disconnected; power outlet faulty; unit fuse blown. | Check power cable connection; try a different outlet; consult qualified service personnel for fuse replacement. |
| No sound output | Incorrect cabling; Bypass switch engaged; Gain control too low; connected equipment off. | Verify all audio cables are correctly connected; disengage Bypass switch; increase Gain; ensure connected equipment is powered on. |
| Distorted sound | Input/output levels too high (clipping); faulty cables; damaged speakers. | Reduce input/output Gain to prevent clipping; check and replace faulty cables; inspect speakers. |
| Excessive feedback | Microphone too close to speakers; high gain settings; room acoustics. | Use the FBQ system to identify and cut feedback frequencies; reposition microphones and speakers; reduce overall gain. |
| Hiss or hum | Ground loop; faulty cables; high-frequency boost; external interference. | Check grounding; use balanced cables; reduce high-frequency sliders; use the High Cut filter; isolate from power cables. |
If the problem persists after trying these solutions, please contact Behringer customer support or a qualified service technician.
8. Specifications
| Feature | Detail |
|---|---|
| Model | ULTRAGRAPH PRO FBQ3102HD |
| Item Model Number | 0821-ABC |
| Type | 31-Band Stereo Graphic Equalizer |
| Feedback Detection | FBQ System |
| Inputs | Balanced XLR, 1/4" TRS |
| Outputs | Balanced XLR, 1/4" TRS, Mono Subwoofer (XLR) |
| Filters | Sweepable High-Cut and Low-Cut |
| Power Source | Corded Electric |
| Voltage | 9 Volts (DC) |
| Item Weight | 2 Kilograms (4.4 pounds) |
| Product Dimensions | 19.02"L x 3.5"W x 5.91"H (19.02 x 5.91 x 3.5 inches) |
| Body Material | Plastic |
| First Available Date | January 1, 2016 |
9. Warranty and Support
Behringer products are designed for reliability and performance. For detailed warranty information, please refer to the warranty card included with your product or visit the official Behringer website.
For technical support, service, or spare parts, please contact your authorized Behringer dealer or distributor. When contacting support, please have your product model number (FBQ3102HD) and serial number ready.
Online resources and FAQs may also be available on the Behringer website.
