1. Introduction
This user manual provides comprehensive instructions for the Behringer Feedback Destroyer Pro FBQ2496, an ultra-high performance 2-channel 24-bit/96 kHz Feedback Destroyer and Parametric EQ. It is designed to automatically and intelligently locate and destroy feedback frequencies, ensuring optimal audio quality in live sound and studio environments.
Please read this manual thoroughly before operating the device to ensure proper setup, operation, and maintenance.
Figure 1: Front panel view of the Behringer Feedback Destroyer Pro FBQ2496, showing controls and displays.
2. Important Safety Instructions
- Power Supply: Use only the specified power supply. Ensure the voltage matches the device's requirements (100 - 240 V~).
- Ventilation: Do not block ventilation openings. Install according to manufacturer's instructions.
- Water and Moisture: Do not use this apparatus near water or expose it to dripping or splashing.
- Heat: Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
- Servicing: 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.
3. Setup
3.1 Unpacking and Inspection
Carefully unpack the FBQ2496 and inspect it for any signs of damage during transit. If any damage is found, contact your dealer immediately.
3.2 Rack Mounting
The FBQ2496 is designed for standard 19-inch rack mounting. Ensure adequate ventilation around the unit when installing it in a rack.
3.3 Connections
The FBQ2496 features balanced inputs and servo-balanced outputs with 1/4'' TRS and gold-plated XLR connectors. Connect your audio source (e.g., mixer output) to the inputs and your amplifier or next processing unit to the outputs.
- Audio Inputs: Use balanced XLR or 1/4" TRS cables for optimal signal integrity.
- Audio Outputs: Connect to your power amplifier or next device in the signal chain using balanced XLR or 1/4" TRS cables.
- MIDI Connections: The unit supports extensive MIDI implementation for remote control and firmware updates. Connect MIDI IN/OUT to your MIDI interface or controller.
- Power Connection: Connect the supplied power cord to the AC inlet on the rear panel and to a suitable power outlet. The internal switch-mode power supply supports 100 - 240 V~.
4. Operating Instructions
4.1 Front Panel Overview
Figure 2: Detailed view of the FBQ2496 front panel controls.
- Level Meter: Displays input/output signal levels for both channels. The CLIP indicator illuminates when the signal is too high.
- LEARN Button: Activates the automatic feedback detection and suppression process.
- PANIC Button: Immediately engages maximum feedback suppression in emergency situations.
- Channel Displays (1/L & 2/R): Show the active filters for each channel. Up to 20 filters per channel can be set.
- Digital Display: Shows parameter values, menu options, and filter numbers.
- Parametric EQ Controls (GAIN, FREQUENCY, BANDWIDTH, PEQ): Used for manual adjustment of parametric filters.
- Rotary Encoder: Navigates menus and adjusts parameter values.
- POWER Button: Turns the unit on/off.
4.2 Operating Modes
The FBQ2496 offers several operating modes to suit different applications:
- Auto Mode: Continuously monitors the mix and automatically sets filters to suppress feedback. This is the "set-and-forget" default setting.
- Single-Shot Mode: Automatically detects and destroys feedback, then locks the filters until they are manually reset. This is useful for ringing out a room before a performance.
- Manual Mode (Parametric EQ): Allows individual programming of up to 40 fully-parametric filters with adjustable frequency, bandwidth, and gain. This mode is ideal for precise sound shaping.
4.3 Basic Feedback Suppression (Auto Mode)
- Ensure all connections are secure and the unit is powered on.
- Set your mixer's output levels to a moderate level.
- Press the LEARN button to activate Auto Mode. The unit will begin analyzing the audio signal.
- Gradually increase the microphone gain until feedback starts to occur. The FBQ2496 will quickly identify and suppress the feedback frequencies.
- The unit will automatically set ultra-narrow FBQ filters to eliminate the feedback while preserving the sonic quality of your signal.
- For immediate feedback emergencies, press the PANIC button.
5. Maintenance
The Behringer FBQ2496 requires minimal maintenance. Follow these guidelines to ensure its longevity:
- Cleaning: Clean the unit with a soft, dry cloth. Do not use liquid cleaners or aerosols.
- Ventilation: Ensure that the ventilation slots are free from dust and obstructions.
- Storage: If storing the unit for an extended period, disconnect it from power and store it in a cool, dry place.
- Firmware Updates: Check the official Behringer website periodically for any available firmware updates. Updates can typically be performed via the MIDI interface.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Power cable disconnected; faulty power outlet. | Check power cable connection; try a different power outlet. |
| No audio output | Incorrect cable connections; unit in Bypass mode; input signal too low. | Verify all audio cable connections; ensure unit is not in Bypass mode; increase input signal level. |
| Feedback not suppressed | LEARN mode not active; filters are full; extreme acoustic conditions. | Activate LEARN mode; reset filters if necessary; adjust microphone placement or gain. |
| Distorted audio | Input signal too high (clipping); faulty cables. | Reduce input signal level (check CLIP indicator); replace cables. |
7. Technical Specifications
- Model: FBQ2496
- Type: 2-channel Feedback Destroyer / Parametric EQ
- Sampling Rate: 96 kHz
- A/D & D/A Conversion: 24-bit/96 kHz
- DSP: 32-bit
- Feedback Filters: Up to 40 FBQ filters (20 per channel)
- Filter Type: Ultra-narrow notch filters (up to 1/60th of an octave)
- Connectors: Balanced 1/4'' TRS and gold-plated XLR inputs/outputs, MIDI In/Out/Thru
- Power Supply: Internal switch-mode power supply (100 - 240 V~)
- Dimensions (H x W x D): 1.75" x 19.02" x 8.54" (44.5 mm x 483 mm x 217 mm)
- Weight: 5.86 lbs (2.66 kg)
- Color: Silver
- Material: Metal Plastic
8. Warranty and Support
8.1 Warranty Information
Behringer products are covered by a limited warranty. For detailed warranty terms and conditions, please refer to the warranty card included with your product or visit the official Behringer website.
8.2 Technical Support
For technical assistance, product registration, or to download the latest drivers and firmware, please visit the Behringer support page on their official website. You can also find FAQs and contact information for customer service there.
Online Resources:
- Official Behringer Website: www.behringer.com
- Product Support Page: Refer to the Behringer website for specific product support.