SAX-100.4 (A,B,C Revision)

The SAX-100.4 is the second "X" series multi-channel amplifier to come from Sundown Audio. This model is built to the same exacting standards as the SAX-100.2 but adds another set of channels and more advanced crossovers. It's flexible crossovers allow the user to run a 2-way active speaker setup with no external processing. It packs enough punch that one could also run a set of front speakers with one pair of channels and a subwoofer, bridged, on the other pair of channels for use as a total system amplifier where high power is not required.


  • 4/3/2 Channel Bridgeable Class-AB Amplifier
  • MOSFET PWM Power Supply
  • Stable Into 4 Ohms Bridged or 2 Ohms Stereo Load
  • Variable Subsonic Filter
  • Independent 1/2 and 3/4 Channel High Pass Filter Variable
  • with x 10 Range Selectable Switch
  • Independent 1/2 and 3/4 Channel Low Pass Filter Variable
  • with x 10 Range Selectable Switch
  • HPF/FULL/LPF Selectable Switch
  • Independent 1/2 and 3/4 Channel Electronic Crossover Slope Selectable
  • Switch with 12dB and 24dB Octave
  • Variable Input Level Control
  • Input Sensitivity : 200mV ~ 6V
  • Subsonic Filter : 10Hz ~ 500Hz
  • Signal Input and Line Out RCA Connectors
  • Multi-Way Protection circuitry (Thermal/Over Current/Speaker Short/Speaker DC protection)
  • Tested Voltage & THD: 14.4V & Less than 0.05% THD
  • Operating Voltage : DC10V~16V Power Input
  • Wired Remote Controller
  • MSPR $549 USD
Rated power output

----RMS power, 4 ohm stereo

100W x 4CH

----RMS power, 2 ohm stereo

160W x 4CH

----RMS power, 4 ohm bridged

320W x 2CH
Signal to Noise Ratio >90dB
Low pass frequency crossover

50Hz~500Hz (CH1&2)
50Hz~5KHz (CH3&4)

High Pass Crossover

50Hz~5KHz (CH1&2)
50Hz~500Hz (CH3&4)
Variable Subsonic Filter 10Hz to 500Hz
Frequency Response 10Hz ~ 40KHz (+/-1dB)
Bass Boost 0~18dB
Variable Bass-Boost Frequency Control 35Hz to 120Hz
Frequency Response 10Hz ~ 40KHz (+/-1dB)
THD@RMS Watts <0.1%
Channel Separation 75dB
Fuse Rating 30A x 3
Input Sensitivity Variable 200mV~6V (+/- 5%)
Dimensions 252(W) x 58(H) x 480(L)mm
  • Find a dealer near you. Find a dealer online.