This 4-channel amplifier was designed along the same lines as the GM-X554: big-bang power (280 Watts peak), very low distortion, brick-house construction, and a bridgeable 2/3/4-channel capability. It also features 4-channels speaker level inputs and a selectable crossover (see specs) that makes installs much easier. 
  • PWM MOSFET Power Supply
  • Continuous Power (14.4V): 35Wx4 (4ohm), 40Wx4 (2ohm), 70Wx2 (4ohm)
  • Max Power (14.4V): 70Wx4 (4ohm), 140Wx2 (4ohm)
  • Frequency Response: 10Hz - 50kHz (0,-1dB)
  • Total Harmonic Distortion: 0.008% (1kHz, 4ohm)
  • Signal-to-Noise Ratio: 100dB (IHF-A)
  • Dimensions: 11" x 2-5/16" x 9-5/16"
  • 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 (Full Range)
  • Hi-Volt Input Level Control (400mV-6.5V)
  • Molex Type Speaker Level Inputs (4 Channel)
  • Selectable Crossover: 80Hz, -12dB/oct. LPF or 80Hz, -12dB/oct. HPF (A,B Ch.)