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Product Info
The Pioneer 4-Channel Car Amplifier 520W GM-A4704 is a 4-channel amplifier that powers front and rear speakers for improved in-car audio quality. It delivers 40W RMS per channel into 4Ω or 65W RMS per channel into 2Ω, with a 520W peak power rating for extra headroom during demanding passages. The amplifier is bridgeable, allowing the four channels to combine into two for driving a subwoofer or additional speakers with more power per channel.
A variable high-pass filter lets you fine-tune the frequency range sent to each speaker, while gain adjustment of up to 6.5V helps match the amplifier's output to your head unit for a cleaner signal. Automatic signal sensing turns the amplifier on and off with the audio source, removing the need for a separate remote turn-on wire. Speaker level inputs allow connection to factory wiring without a dedicated pre-amp output, and the one-body heat sink design manages heat across a compact chassis.
Features
- 4-channel amplifier design powers front and rear speakers for improved audio quality
- Delivers 40W RMS per channel at 4Ω or 65W RMS per channel at 2Ω
- 520W peak power rating provides extra headroom during demanding passages
- Variable HPF adjusts the frequency range sent to each speaker for better tuning
- Automatic signal sensing turns the amplifier on and off with the audio source
- Speaker level inputs allow connection to factory wiring without a dedicated pre-amp output
- Bridgeable design combines four channels into two for driving a subwoofer or additional speakers
- Gain adjustment of up to 6.5V matches output to the head unit for a cleaner signal
- One-body heat sink manages heat across a compact chassis
- Compact 326mm (W) x 60mm (H) x 215mm (D) chassis for easy mounting
Tech Spec
| RMS Power Output (per channel) | 40W x 4 @ 4Ω, 65W x 4 @ 2Ω |
|---|---|
| Peak/Max Power Output | 520W total (4Ω bridged) |
| Number of Channels | 4 |
| Class (A/B, D, etc.) | Class AB |
| Impedance Range (ohms) | 2 to 4 Ω |
| Frequency Response | 10Hz to 70kHz (+0dB, -3dB) |
| Signal-to-Noise Ratio | >94dB |
| Crossover (High/Low Pass) | HPF 40Hz to 500Hz, LPF 80Hz, both -12dB/octave |
| Input Type (RCA / High-Level) | 4-channel RCA inputs plus speaker level (high-level) inputs |
| Fuse Rating | 30A x 1 |
| Operating Voltage | 14.4V DC (10.8V to 15.1V allowable) |
| Dimensions (L x W x H) | 326mm (W) x 60mm (H) x 215mm (D) |