This 4-channel amplifier was built along the same lines as the GM-X564: very low distortion, brick-house construction, and a bridgeable 2/3/4-channel, capability for added system flexibility. The GM-X364's PWM regulated MOSFET power supply delivers high power (300 Watts peak) and provides RCA outputs and speaker level inputs (4-channel). Also, a built-in selectable crossover (see specs) makes the install much easier. Architectural Digest would give it a centerfold.


  • PWM Regulated MOSFET Power Supply
  • Bridgeable 2/3/4 Channel Capability
  • Balanced Isolator Input Circuit
  • Screw-Type Power/Ground Terminals
  • Screw-Type Speaker Terminals
  • RCA Inputs (4-Channel)
  • RCA Outputs
  • Hi-Volt Input Level Control (400mV-6.5V)
  • Speaker Level Inputs (4-Channel)
  • Selectable Crossover: 80Hz, -12dB/oct. (LPF/HPF- A,B Channel)


  • Continuous Power (14.4V): 35Wx4 (4 ohm), 40Wx4 (2 ohm), 70Wx2 (4 ohm)
  • Max Power (14.4V): 70Wx4 (4 ohm), 150Wx2 (4 ohm)
  • Frequency Response: 10Hz - 50kHz (0,-1dB)
  • Total Harmonic Distortion: 0.008% (1kHz, 4W)
  • Signal-to-Noise Ratio: 100dB (IHF-A)
  • Dimensions: 11" x 2-5/16" x 9-5/16"