Introduction
Thank you for choosing the Autotek TA-1255.4 4-Channel Class AB Car Audio Amplifier. This manual provides essential information for the proper installation, operation, and maintenance of your amplifier. Please read this manual thoroughly before attempting installation or use to ensure optimal performance and safety.
Important Safety Information
WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Always handle with care and follow all local safety guidelines.
Ensure proper ventilation around the amplifier to prevent overheating. Disconnect the vehicle's battery before making any electrical connections. Professional installation is recommended.
Key Features
- Class A/B MOSFET Four Channel Amplifier
- Peak Power: 4x300 @ 2 Ohms, 4x150 @ 4 Ohms, 2x600 Mono Bridged @ 4 Ohms
- Frequency Response: 10Hz-20kHz
- Built-in switchable bass control: 0/+6/+12dB
- 4 AWG Power and 12 AWG Speaker Terminal Wire Gauges
Package Contents
Verify that all items are present in the package:
- Autotek TA-1255.4 Amplifier
- Instruction Manual (this document)
- Installation Screws
- High-Level Input Harness
- Autotek Decals
Setup and Installation
Proper installation is crucial for the performance and longevity of your amplifier. Always ensure the vehicle's battery is disconnected before beginning any wiring.
Mounting the Amplifier
Choose a mounting location that provides adequate ventilation and is protected from moisture and direct sunlight. Secure the amplifier using the provided mounting screws.
Wiring Connections
Refer to the rear panel diagram for correct wiring. Use 4 AWG wire for power and ground connections, and 12 AWG wire for speaker terminals.
- Power (B+): Connect to the positive terminal of the vehicle's battery via an appropriate fuse (not included).
- Ground (GND): Connect to a clean, unpainted metal surface of the vehicle chassis.
- Remote (REM): Connect to the remote turn-on lead from your head unit.
- Speaker Outputs: Connect your speakers to the appropriate channels. For bridged mode, refer to the diagram on the amplifier.
- Line Input (RCA): Connect to the RCA outputs of your head unit.
- High-Level Input: Use the provided harness to connect to speaker-level outputs from your head unit if RCA outputs are not available.
Operating the Amplifier
Once installed, adjust the amplifier settings for optimal sound performance.
Gain Control
The gain control matches the amplifier's input sensitivity to the output of your head unit. Start with the gain at minimum and slowly increase it until you hear distortion, then back off slightly.
Crossover Settings (X-OVER)
The TA-1255.4 features adjustable crossovers:
- HPF (High-Pass Filter): Allows frequencies above the set point to pass through. Useful for full-range speakers to prevent low-frequency distortion.
- LPF (Low-Pass Filter): Allows frequencies below the set point to pass through. Useful for subwoofers.
- FULL: Disables the crossover, allowing all frequencies to pass.
Bass EQ
The switchable bass control allows you to boost bass frequencies at 0dB, +6dB, or +12dB. Use this feature to fine-tune your bass response to your preference.
Maintenance
To ensure long-lasting performance from your Autotek amplifier, follow these simple maintenance tips:
- Cleaning: Periodically wipe the amplifier's exterior with a soft, dry cloth. Avoid using harsh chemicals or abrasive cleaners.
- Ventilation: Ensure that the amplifier's cooling fins are free from dust and debris to maintain proper heat dissipation.
- Connections: Regularly check all power, ground, remote, and speaker connections to ensure they are secure and free from corrosion.
Troubleshooting
If you experience issues with your amplifier, consult the following table for common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No Power | Blown fuse, loose power/ground/remote wire, faulty battery connection. | Check and replace fuses. Verify all connections are secure. Test battery voltage. |
| No Sound | Loose RCA/speaker wires, incorrect gain setting, head unit issue. | Check all audio connections. Adjust gain. Verify head unit is functioning. |
| Distorted Sound | Gain set too high, improper crossover settings, speaker impedance mismatch. | Reduce gain. Adjust crossover settings. Ensure speakers match amplifier impedance. |
| Amplifier Overheating | Insufficient ventilation, low impedance load, prolonged high-volume use. | Ensure proper airflow. Check speaker impedance. Reduce volume or allow to cool. |
Specifications
| Feature | Detail |
|---|---|
| Model Number | TA-1255.4 |
| Output Power | 1200 Watts (Max) |
| Number of Channels | 4 |
| Amplifier Class | Class A/B MOSFET |
| Frequency Response | 10Hz-20kHz |
| Bass Control | 0/+6/+12dB Switchable |
| Power Wire Gauge | 4 AWG |
| Speaker Wire Gauge | 12 AWG |
| Item Dimensions (L x W x H) | 10.25 x 8.8 x 2.1 inches |
| Item Weight | 5.48 pounds |
| Voltage | 9 Volts (AC) |
| Maximum Supply Voltage | 9 Volts (AC) |
| Material | Mosfet |
| Color | Multicolored |
Warranty and Support
For warranty information and technical support, please refer to the warranty card included in your product packaging or visit the official Autotek website. Keep your purchase receipt as proof of purchase for any warranty claims.
