Introduction
Thank you for choosing the Infinity Reference-3004A 4-Channel Amplifier. This amplifier is designed to provide high-quality audio performance for your vehicle's sound system. This manual provides essential information for proper installation, operation, and maintenance to ensure optimal performance and longevity of your amplifier.
Safety Information
Please read all instructions carefully before installing and operating this amplifier. Failure to follow these guidelines may result in damage to the product, vehicle, or personal injury.
- Always disconnect the vehicle's battery negative terminal before beginning any electrical work.
- Ensure proper wiring and connections to prevent short circuits and electrical hazards.
- Mount the amplifier securely in a location that allows for adequate ventilation and is protected from moisture and excessive heat.
- Use appropriate gauge wiring for power, ground, and speaker connections as specified in the installation section.
- Consult a professional installer if you are unsure about any part of the installation process.
What's in the Box
Verify that all items are present before installation:
- One Reference 3004A four-channel amplifier
- Four bare wire-to-RCA adapters
- Four 30A ATO fuses (2 installed, 2 spare)
- Owner's Manual
- Four mounting screws (M4 x 53mm)
- Two Infinity decals
- One logo badge
Setup and Installation
Mounting the Amplifier
The Reference-3004A amplifier features a compact footprint, allowing for flexible installation in various vehicles. Choose a mounting location that:
- Provides sufficient airflow for cooling.
- Is protected from direct sunlight, moisture, and excessive vibration.
- Allows for easy access to wiring connections and controls.
Secure the amplifier using the provided mounting screws. Ensure the heat sink side (opposite the connections) is positioned to allow for optimal heat dissipation, especially if installing vertically.
Image: The Infinity Reference-3004A amplifier shown installed in a vehicle's trunk, demonstrating its compact size and potential mounting location.
Wiring Connections
Proper wiring is crucial for performance and safety. Refer to the diagram below for connection points.
Image: A detailed view of the rear panel of the Infinity Reference-3004A amplifier, highlighting the power, ground, remote, RCA input/output, and speaker wire terminals.
- Power (BATT +12V): Connect to the positive terminal of the vehicle's battery using an appropriate gauge power cable (e.g., 4-gauge or 8-gauge depending on total system power). Install an in-line fuse holder within 18 inches (45 cm) of the battery.
- Ground (GND): Connect to a clean, unpainted metal surface of the vehicle chassis. Ensure a solid, low-resistance connection. Use the same gauge wire as the power cable.
- Remote (REM): Connect to the remote turn-on output of your head unit. This wire turns the amplifier on and off with your stereo.
- Input (FRONT/REAR RCA): Connect to the RCA pre-out jacks of your aftermarket head unit. For factory radios without RCA outputs, use the included bare wire-to-RCA adapters with speaker-level inputs. The amplifier's Balanced Differential Inputs ensure low noise and distortion.
- Speaker Outputs: Connect your speakers to the appropriate terminals. This is a 4-channel amplifier, allowing for connection of four speakers. It can also be bridged for 2-channel operation to power subwoofers.
Protection Circuitry
The Reference-3004A includes on-board circuitry to protect against shorts, high-temperature, overvoltage, and undervoltage conditions. An LED indicator (PWR/PROT) is provided to signal when one of these conditions exists.
Operating Instructions
After installation, adjust the amplifier settings for optimal audio performance.
Image: A close-up of the side panel of the Infinity Reference-3004A amplifier, revealing the adjustable gain, crossover (HPF/LPF/FULL), and input level controls for both front and rear channels.
- Gain Adjustment: The gain control matches the amplifier's input sensitivity to the output of your head unit. Start with the gain set to minimum (fully counter-clockwise). Play a dynamic piece of music at about 75% of your head unit's maximum volume. Slowly increase the amplifier's gain until you hear distortion, then back it off slightly.
- Crossover Settings (HPF/LPF/FULL): The Reference-3004A features variable electronic crossover circuits for precise tuning.
- HPF (High-Pass Filter): Allows frequencies above the set point to pass through. Useful for protecting full-range speakers from low bass frequencies.
- LPF (Low-Pass Filter): Allows frequencies below the set point to pass through. Typically used when bridging the amplifier to power subwoofers.
- FULL: Disables the crossover, allowing all frequencies to pass.
- PWR/PROT LED Indicator: A green light indicates normal operation (Power). A red light indicates the amplifier is in protection mode due to a fault (Protection).
Maintenance
The Infinity Reference-3004A amplifier requires minimal maintenance.
- Keep the amplifier clean and free of dust and debris. Use a soft, dry cloth for cleaning.
- Ensure all wiring connections remain secure. Periodically check for loose connections.
- Do not block the ventilation fins, as this can lead to overheating.
Troubleshooting
If you experience issues with your amplifier, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No power / PWR/PROT LED off | Blown fuse, loose power/ground/remote wire, no power from battery. | Check in-line fuse and amplifier fuses. Verify all power, ground, and remote connections. Test battery voltage. |
| Amplifier in protection mode / PWR/PROT LED red | Short circuit in speaker wiring, overheating, over/undervoltage. | Check speaker wires for shorts to chassis or each other. Ensure adequate ventilation. Verify vehicle's electrical system voltage. Allow amplifier to cool down. |
| No sound output | No input signal, incorrect gain setting, speaker wires disconnected. | Check RCA or speaker-level input connections. Adjust gain. Verify speaker wire connections at both amplifier and speakers. |
| Distorted sound | Gain set too high, incorrect crossover settings, poor input signal. | Reduce gain setting. Adjust HPF/LPF settings. Check head unit output for distortion. |
If the problem persists after attempting these solutions, contact Infinity customer support or a qualified service technician.
Specifications
Key technical specifications for the Infinity Reference-3004A amplifier:
| Feature | Specification |
|---|---|
| Model Number | Reference-3004A |
| Number of Channels | 4 |
| Output Power (RMS) | 75 Watts x 4 (at 4 ohms) |
| Voltage | 16 Volts (DC) |
| Supply Current | 13.8 Amps |
| Item Dimensions (L x W x H) | 8.94 x 14.96 x 4.45 inches |
| Item Weight | 6 pounds |
| Specification Met | CEA-2006 |
Warranty and Support
Warranty Information
Infinity products are designed for durability and performance. This product is covered by a limited warranty against defects in materials and workmanship. The duration and terms of the warranty may vary by region. Please refer to the warranty card included with your product or visit the official Infinity website for detailed warranty information.
Customer Support
For technical assistance, troubleshooting, or service inquiries, please contact Infinity customer support. You can find contact information on the official Infinity website or through your local authorized dealer.
Online Resources: www.infinityspeakers.com
