Sundown Audio SDX-100.4 4-Channel 100x4 Car Audio Amplifier/Amp


Moderate power, tiny size, but at the top-end of Full-Range Class-D fidelity. The controls will have a removable cover that bolts down on top of them. The overall case is a big chunk of cast aluminum to keep temperatures in check!

Product Manual


  • High Efficiency Digital Multi-Channel Design
  • 12dB/Octave-Variable High Pass Filter
  • 12dB/Octave-Variable Low Pass Filter
  • DC Auto sense feature
  • 4 Way Protection Circuit (Thermal,
  • Voltage Speaker short and DC Offset)
  • Optional Wired Remote Control


  • 4-Channel Class-D Amplifier
  • 4 x 100W at 4 Ohm
  • 4 x 155W at 2 Ohm
  • 2 x 310W at 4 Ohm Bridged
  • S/N: >92dB
  • Cast Aluminum Heat Sync
  • Water Resistant
  • Highpass / Lowpass / Bandpass Filter
  • Gain Adjustment 
  • Suitable for vehicles with start / stop function
  • Dimensions in mm (LxWxH): 226 x 154 x 53 mm

Note: Unscrew the badge using an allen key to access audio settings.