Pioneer GM-A6704 4-Channel Class AB Car Amplifier, 1000W Max, 4 x 60W RMS at 4 Ohm, 4 x 95W RMS at 2 Ohm, Bridgeable 2 x 190W RMS at 4 Ohm, Bass Boost, Low Pass Filter

The Pioneer GM-A6704 is a 4-channel Class AB car amplifier delivering robust power and flexible configuration for enhanced in-car audio. With 1000 watts of maximum power, it drives four speakers at 60 watts RMS each into 4 ohms, or can be bridged to power two channels at 190 watts RMS into 4 ohms for a more demanding setup. A variable low-pass filter (40–500 Hz) and selectable bass boost (0/6/12 dB at 50 Hz) allow precise tuning to match your subwoofers or full-range speakers.

Advantages

High power output with bridgeable channels provides versatility for various speaker configurations. The Class AB design ensures efficient performance with low distortion (<0.05% THD) and a high signal-to-noise ratio (>94 dB) for clean sound. Speaker-level inputs (3.0–26 V) enable integration with factory head units lacking RCA outputs.

Suitable for

• Upgrading factory car audio systems with added power and clarity
• Powering component or coaxial speakers in a 4-channel setup
• Bridging to drive subwoofers or high-power front speakers
• Users needing flexible input options (RCA or speaker-level)

Key specifications

• Amplifier class: Class AB
• Number of channels: 4
• RMS power output (4 Ohm): 4 x 60 W
• RMS power output (2 Ohm): 4 x 95 W
• RMS power output (bridged 4 Ohm): 2 x 190 W
• Maximum power output: 1000 W total
• Frequency response: 10 Hz – 70 kHz
• Signal-to-noise ratio: > 94 dB
• Total harmonic distortion: < 0.05%
• Input sensitivity (RCA): 0.3 V – 6.5 V
• Input sensitivity (speaker level): 3.0 V – 26 V
• Low pass filter range: 40 – 500 Hz
• Bass boost: 0/6/12 dB at 50 Hz
• Speaker impedance (stereo): 2 – 8 Ohm
• Speaker impedance (bridged): 4 – 8 Ohm
• Fuse rating: 25 A x 2
• Power requirement: 14.4 V DC (10.8 V – 15.1 V allowable)

Recommendations

For optimal performance, use a power and ground wire of at least 8 AWG and ensure proper ventilation. Set the gain carefully to match your head unit's output to avoid clipping. The built-in crossover and bass boost make it easy to tailor the sound to your vehicle's acoustics.