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GM-A6704: 2/4-Channel GM-A Series Amplifier

Available in two- and four-channel configurations from 500W to 1,000W, the maximum power output of all models has been upgraded by up to 30 %, providing enhanced headroom for distortion-free music playback even at high volume.

Bass Level Optimization

Bass Boost (Remote) for optimal bass level adjustment according to listening preferences and music characteristics. From dramatic distinction to dramatic design, Pioneer’s new GM-Series amplifiers are thrillers in every sense, pushing the limits of flexibility and functionality.

GM-A6704: 1,000W Power Output

New Pioneer amps brilliantly integrate high-power performance superior to that of previous models in space-efficient sizes for flexibility of installation in various car cabins with up to 1000W Max Power Output.

Variable HPF/LPF

Variable HPF (High Pass Filter) and LPF (Low Pass Filter) allows for adjustable frequency between 40 Hz to 500 Hz and greater car audio system flexibility according to subwoofer characteristics and personal listening preference.


Amplifier ClassClass AB
No. of Channels4/3/2
Max.power output170 W x 4 (4Ω) 250 W x 4 (2Ω) 500 W x 2 (4Ω Bridged)
RMS power output60 W x 4 (4Ω) 95 W x 4 (2Ω) 190 W x 2 (4Ω Bridged)
Frequency Response10 Hz to 70 kHz
Impedance2Ω to 8Ω
Total Harmonic Distortion(THD)<0.05%
S/N Ratio>95 dB
Speaker Level InputYes
Automatic Signal Sensing and Turn-OnYes
Crossover TypeVariable HPF/LPF (A-Ch) HPF/LPF (B-Ch)
Crossover FrequencyA-Ch: HPF: 40 Hz to 500 Hz LPF: 80 Hz B-Ch: HPF/LPF: 80 Hz
Bass Boost Frequency50 Hz
Baas Boost Level0/6/12 dB
Dimensions356 mm x 60 mm x 215 mm

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