1. Okwu mmalite
Thank you for choosing the Gravity 7 Band Graphic Equalizer GR-EQ9. This equalizer is designed to provide precise control over your car audio system, allowing you to fine-tune sound frequencies for an enhanced listening experience. Please read this manual thoroughly before installation and operation to ensure proper use and optimal performance.
2. Ozi nchekwa
- Always disconnect the vehicle's battery before beginning any installation.
- Hụ na waya niile dị n'ime mmiri nke ọma iji gbochie sekit dị mkpụmkpụ.
- Mount the equalizer securely to avoid movement during vehicle operation.
- Do not operate the unit in wet conditions or expose it to excessive moisture.
- Gakwuru ọkachamara n'ihe gbasara itinye ụda n'ụgbọala ma ọ bụrụ na ị maghị akụkụ ọ bụla nke usoro nrụnye ahụ.
3. Ihe ngwugwu
Verify that all items are present in your GR-EQ9 package:
- Gravity 7 Band Graphic Equalizer GR-EQ9 Unit
- Ihe nkwado nkwado
- Ịkwanye kposara
- Power/Ground/Remote Wiring Harness
- Akwụkwọ ntuziaka onye ọrụ

Image: Included mounting brackets, screws, and wiring harness for the GR-EQ9.
4. Ngwaahịa gafereview
4.1. Njikwa ihu ihu

Foto: Top view of the GR-EQ9 front panel with all controls.
- Ọkwa okpuru ala: Adjusts the output level of the subwoofer.
- IHE: Master volume control for the entire system.
- SUB FREQ: Adjusts the low-pass crossover frequency for the subwoofer output (60Hz to 90Hz).
- AKW :KWỌ: Balances the audio output between front and rear speakers.
- AUX/CD Selector: Switches between Main (CD) and Auxiliary (AUX) input sources.
- 7-Band Equalizer Knobs: Individual controls for 50Hz, 125Hz, 315Hz, 750Hz, 2.2KHz, 6KHz, and 16KHz frequencies. Each band can be boosted or cut by -12dB to +12dB.
- HIGH LEVEL / MAIN LEVEL: Input level adjustment for high-level or main RCA inputs to prevent distortion.
4.2. Njikọ azụ panel

Image: Close-up of the GR-EQ9 rear panel connections.
- MAIN IN (L/R): RCA inputs for the primary audio source (e.g., head unit).
- AUX IN (L/R): RCA inputs for an auxiliary audio source.
- FRONT OUT (L/R): RCA outputs for front speakers.
- REAR OUT (L/R): RCA outputs for rear speakers.
- SUB OUT (L/R): RCA outputs for subwoofer amplifier. This output features a 10V line driver.
- Power Terminals (+12V, REM, GND): Connections for power, remote turn-on, and ground.
5. Nhazi
5.1. Nwụnye
The GR-EQ9 is designed for flexible installation in various vehicle locations. Consider a location that allows for easy access to controls and proper ventilation.

Image: Mounting diagram for the GR-EQ9.
- Choose a suitable mounting location (e.g., under the dashboard, in the center console).
- Use the provided mounting brackets as a template to mark screw holes.
- Drill pilot holes and secure the brackets using the supplied screws.
- Attach the GR-EQ9 unit to the mounted brackets.
5.2. Ihe nkedo
Proper wiring is crucial for optimal performance and safety. Ensure all connections are secure and correctly polarized.
- Njikọ ike (+12V): Connect the +12V wire from the equalizer to a constant +12V power source from the vehicle's battery. Use an inline fuse (not supplied) for protection. The unit operates between 9V and 16V.
- Njikọ ala (GND): Connect the GND wire to a clean, unpainted metal surface on the vehicle chassis.
- Ngbanye aka n'ime ime obodo (REM): Connect the REM wire to the remote output of your head unit. This will turn the equalizer on and off with your car's audio system.
- Ntinye RCA: Connect the RCA output from your head unit to the Isi N'ime (L/R) inputs on the GR-EQ9. If using an auxiliary device, connect its RCA output to the ỌXụ IN (L/R) inputs.
- Mpụta RCA: Jikọọ ISI N'IHU (L/R), Zọpụta azụ (L/R), and Gbanyụọ (L/R) from the GR-EQ9 to the corresponding inputs on your ampndị na -enye ndụ.
6. Ntuziaka ọrụ
Once installed, the GR-EQ9 allows for precise audio customization.
- Ike Na: The unit will power on automatically when the remote turn-on signal is received from your head unit.
- Nhọrọ ntinye: Jiri ihe AUX/CD Selector button to switch between your main audio source (CD) and the auxiliary input (AUX).
- Njikwa olu: Hazie nke Mpịakọta knob to set the overall listening level.
- Njikwa Subwoofer:
- Jiri ihe Ọkwa SUB knob to control the output volume of your subwoofer.
- Hazie nke SUB FREQ knob to set the low-pass crossover point for the subwoofer, typically between 60Hz and 90Hz, to blend with your main speakers.
- Ndozi nha nhata: Use the seven individual frequency knobs (50Hz, 125Hz, 315Hz, 750Hz, 2.2KHz, 6KHz, 16KHz) to boost or cut specific frequency ranges. Adjust these to tailor the sound to your preference and vehicle acoustics. Each band offers a range of -12dB to +12dB.
- Njikwa Fader: Nke FADER knob allows you to adjust the balance of sound between your front and rear speakers.
- Input Level Adjustment: Jiri ihe HIGH LEVEL / MAIN LEVEL switch and corresponding knobs to match the input signal level from your head unit, preventing distortion.
7. Nlekọta
- Debe akụkụ ahụ ọcha site na iji akwa dị nro na nke kpọrọ nkụ hichapụ ya.
- Zere iji kemịkalụ siri ike ma ọ bụ ihe nchacha.
- Gbaa mbọ hụ na njikọ niile echekwabara na enweghị mmebi.
8. Nchọpụta nsogbu
| Nsogbu | Ihe nwere ike ime | Ngwọta |
|---|---|---|
| Enweghị ike | Blown fuse; incorrect wiring; no remote signal. | Check and replace fuse; verify +12V, GND, and REM connections. |
| Enweghị ụda | Incorrect RCA connections; amplifier not powered; input source issue. | Verify all RCA cables are connected correctly; ensure amplifiers are on; check head unit output. |
| Ụda agbagọ | Input level too high; equalizer settings too extreme; poor grounding. | Adjust input level using HIGH LEVEL/MAIN LEVEL controls; reduce EQ boost; check ground connection. |
| Noise/Hiss | Poor grounding; RCA cables too close to power wires; gain settings too high. | Ensure proper grounding; reroute RCA cables away from power wires; adjust ampntọala uru lifier. |
9. Nkọwapụta
- Ụdị: GR-EQ9
- Akụkụ ngwaahịa: 1.8 x 9 x 7.7 sentimita asatọ
- Ibu ihe: 1.6 pound
- Equalizer Bands: 7 (50Hz, 125Hz, 315Hz, 750Hz, 2.2KHz, 6KHz, 16KHz)
- Boost/Cut: -12 dB to +12 dB per band
- Ugboro ugboro Subwoofer Crossover: Adjustable (60Hz-90Hz)
- Line Driver Output: 10V (Subwoofer Output)
- Ịnye ọkụ: 9V-16V DC
- Atụmatụ pụrụ iche: EPICENTER, Fully Adjustable EQ Bands, Line Driver, RCA Output, Subwoofer Control
10. Akwụkwọ ikike
This Gravity product is covered by a manufacturer's warranty against defects in materials and workmanship. Please refer to the warranty card included with your purchase or contact customer support for specific terms and conditions. Keep your proof of purchase for warranty claims.
11. Nkwado
For technical assistance, troubleshooting, or warranty inquiries, please contact Gravity customer support. Contact details can typically be found on the product packaging or the official Gravity websaịtị.





