Pioneer GM-A6704
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Pioneer GM-A6704

4-Channel Bridgeable Amplifier with Bass Boost

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Variable HPF

Variable HPF (High 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.

Variable HPF

Bass Boost

Bass Boost featured in the GM-A6704 and GM-A5702 can be set to levels variably from 0 to 12 dB for optimal bass. This precise control can enhance the overall balance and impact of all sounds according to listening preference and music style. The GM-A5702 allows adjustment in three steps: 0 dB, 6 dB or 12 dB.

Bass Boost


  • Number of Channels: 4
  • Amplifer Class: Class AB
  • Maximum Power Output: 1000W
  • Maximum Power Output at 2 Ohms: 250W x 4
  • Maximum Power Output at 4 Ohms: 170W x 4
  • Nominal Power (RMS) Output at 2 Ohms: 95W x 4
  • Nominal Power (RMS) Output at 4 Ohms: 60W x 4
  • Nominal Power (RMS) Output - Bridged at 4 Ohms: 190W x 4
  • Frequency Response: 10Hz ~ 70kHz (+0dB , -3dB)
  • Total Harmonic Distortion (THD): <0.05% ( 10W, 1kHz)
  • Signal-to-Noise (SN) Ratio: > 95dB
  • Fuse Rating: 25Ax2


  • RCA Inputs: 4-CH
  • Speaker Level Inputs: Yes
  • Crossover Type: Adjustable HPF/LPF
  • Low-Pass Crossover Frequency: 80 Hz
  • Low Pass Slope (dB/octave): -12db/oct (A/B CH)
  • High-Pass Crossover Frequency: 40-500 Hz
  • High-Pass Slope (dB/octave): -12dB/oct
  • Bass Boost Frequency: 50Hz
  • Bass Boost Level: 0/6/12dB
  • Automatic Signal Sensing and Turn-On: Yes
  • Hi-Volt Input Level Control: 0.3V to 6.5V (RCA in), 3.0V to 26V (SP in)
  • Terminal Type: Screw
  • Load Impedance Allowance (Ohm): 2 to 4
  • Bridgeable: Yes
  • Protection Control System: Yes
  • Dimensions (WxHxD)(inches): 356(W) X 60(H) X 215(D) mm
  • Warranty: 1 Year
  • UPC: 884938340267
  • Weight: 8
*Warranty: 1 Year warranty.
1 Year warranty from implies that repairs must be returned to, not the manufacturer. More information can be found in our help section under returns & warranties.
What's not covered : Misuse, abuse, defacement, physical damage of any kind, and improper installation / operation. Video and multimedia equipment with damaged or cracked screens.Subwoofers and speakers are not warranted against being blown, burned or abused.