1. Introduction
The Audiobank EQ7 is a 1/2 DIN 7-band car audio equalizer designed to provide precise control over your vehicle's sound system. This unit allows for detailed audio customization, enhancing the sound quality of your music by adjusting specific frequency bands. It features multiple input and output options for integration with various car audio setups, including front, rear, and subwoofer amplifiers, as well as portable devices.
Key Features
- Seven equalization bands (50Hz, 125Hz, 315Hz, 750Hz, 2.2kHz, 6kHz, and 12kHz), each frequency adjustable from -12 to +12dB (-15 to +15dB for subwoofer frequencies).
- Subwoofer output with a built-in selectable crossover frequency of 43-120Hz or 60-200Hz.
- Three stereo RCA outputs to drive front, rear, and subwoofer audio amplifiers.
- An auxiliary stereo RCA input for use with portable devices, such as an MP3 Player or DVD player.
- Separate controls for master volume, subwoofer volume (sub level), front/rear fader, and selection of main or auxiliary inputs.
- RCA connectors to ensure optimal audio signal output.
- ISO mounting holes and removable trim ring for custom installation.
2. Safety Information
Please read all instructions carefully before installation and operation. Failure to follow these guidelines may result in damage to the unit, your vehicle, or personal injury. Keep this manual for future reference.
- Always disconnect the vehicle's negative battery terminal before beginning any electrical work.
- Ensure all wiring is properly insulated to prevent short circuits.
- Mount the unit securely to avoid movement during vehicle operation.
- Do not operate the unit in wet conditions or expose it to excessive moisture.
- Consult a professional car audio installer if you are unsure about any part of the installation process.
3. Package Contents
Verify that all items are present in the package before proceeding with installation:
- Audiobank EQ7 Equalizer Unit
- Mounting Hardware (screws, L-brackets)
- Power Connector

4. Installation
Proper installation is crucial for optimal performance. Follow these steps carefully.
4.1. Wiring Diagram Overview
The Audiobank EQ7 features a clear layout for all connections on its rear panel. This includes power input, RCA inputs for main and auxiliary sources, and RCA outputs for front, rear, and subwoofer amplifiers.

4.2. Mounting
The EQ7 can be mounted using the provided ISO mounting holes and L-brackets. Choose a location that is easily accessible for adjustments but does not obstruct driving or safety features. The removable trim ring allows for a custom, flush installation.

4.3. Power Connections
Connect the power wires to the 3-pin power connector as follows:
- +12V (BATT): Connect to a constant +12V power source from the vehicle's battery. Ensure an inline fuse (not included) is used for protection.
- GND (GROUND): Connect to a solid chassis ground point in the vehicle. Ensure a clean, paint-free metal surface for good contact.
- REM (REMOTE): Connect to the remote turn-on output of your head unit or ignition switch. This will turn the EQ7 on and off with your car's audio system.
4.4. Audio Connections
Use high-quality RCA cables for all audio connections to minimize noise and signal loss.
- RCA Input (Main): Connect the RCA output from your head unit (or primary audio source) to the DVD INPUT L/R ports on the EQ7.
- RCA Input (Auxiliary): For portable devices (MP3 players, smartphones, etc.), connect their audio output to the AUX INPUT L/R ports.
- RCA Outputs:
- FRONT OUTPUT L/R: Connect to the RCA inputs of your front channel amplifier.
- REAR OUTPUT L/R: Connect to the RCA inputs of your rear channel amplifier.
- SUB OUTPUT L/R: Connect to the RCA inputs of your subwoofer amplifier.
5. Operation
The Audiobank EQ7 provides intuitive controls for fine-tuning your audio experience.

5.1. Front Panel Controls
- VOLUME FADER: This knob controls the overall master volume of the system and the balance between front and rear speakers.
- SUB FREQ: A switch to select the subwoofer crossover frequency (43-120Hz or 60-200Hz).
- SUB VOL: Adjusts the output level of the subwoofer channel independently.
- EQ Bands (50Hz, 125Hz, 315Hz, 750Hz, 2.2kHz, 6kHz, 12kHz): These seven rotary controls allow you to boost or cut specific frequency ranges by up to +/-12dB (or +/-15dB for subwoofer frequencies).
- INPUT SELECTOR (DVD/AUX): A switch to toggle between the main (DVD) RCA input and the auxiliary (AUX) RCA input.

5.2. Adjusting Audio Settings
- Start with all EQ bands set to their center (flat) position.
- Set the VOLUME FADER to a comfortable listening level.
- Adjust the SUB VOL to blend the subwoofer output with the main speakers.
- Use the EQ bands to fine-tune the sound. Boost frequencies to emphasize them or cut them to reduce harshness or unwanted resonance.
- Experiment with the SUB FREQ switch to find the best crossover point for your subwoofer and main speakers.
- Use the INPUT SELECTOR to switch between your primary audio source and any auxiliary devices connected.
6. Maintenance
To ensure the longevity and optimal performance of your Audiobank EQ7, follow these simple maintenance guidelines:
- Cleaning: Use a soft, dry cloth to wipe down the unit. Avoid abrasive cleaners or solvents that could damage the finish or controls.
- Connections: Periodically check all wiring connections to ensure they are secure and free from corrosion.
- Environment: Keep the unit away from extreme temperatures, direct sunlight, and excessive dust or moisture.
7. Troubleshooting
If you encounter issues with your Audiobank EQ7, refer to the table below for common problems and their solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| No Power | Blown fuse; incorrect wiring (12V, Ground, Remote); faulty remote turn-on signal. | Check and replace fuse; verify all power connections are secure and correct; test remote wire for 12V signal when head unit is on. |
| No Sound Output | Incorrect RCA connections; input selector switch set incorrectly; amplifier not powered on; volume/fader set too low. | Verify all RCA cables are connected to the correct inputs/outputs; ensure input selector is on the active source; check amplifier power; increase volume/fader. |
| Distorted Sound | Input signal too high (clipping); EQ bands set too aggressively; faulty RCA cables. | Reduce head unit output volume; adjust EQ bands closer to flat; replace RCA cables. |
| Engine Noise / Whine | Poor grounding; RCA cables routed too close to power wires; ground loop. | Ensure all ground connections are solid and clean; re-route RCA cables away from power wires; consider using a ground loop isolator. |
8. Specifications
| Feature | Detail |
|---|---|
| Model Number | AB-EQ7 |
| Equalization Bands | 7 Bands (50Hz, 125Hz, 315Hz, 750Hz, 2.2kHz, 6kHz, 12kHz) |
| EQ Adjustment Range | +/-12dB (main bands), +/-15dB (subwoofer frequencies) |
| Subwoofer Crossover Frequencies | Selectable 43-120Hz or 60-200Hz |
| RCA Outputs | Front, Rear, Subwoofer |
| RCA Inputs | Main (DVD), Auxiliary (AUX) |
| Connectivity Technologies | Auxiliary, RCA |
| Item Weight | 1.72 pounds |
| Package Dimensions | 9.17 x 7.91 x 2.17 inches |
| Manufacturer | Audiobank |
9. Warranty & Support
For warranty information and technical support, please refer to the documentation provided with your purchase or contact Audiobank customer service directly. Keep your proof of purchase for any warranty claims.