SIA-1250D SMART 1250W Wide Range Class D Amplifier


Sundown Audio SIA 1250D is Sundown Audio's latest and greatest intelligent full bridge amplifier, the sundown SIA 1250's power supply is built stronger, heatsink is heavier, and the SIA 1250's feature intelligent low voltage technology protecting the amplifier from typical full bridge malfunction. The SIA 1250 also runs cooler because of Sundown Audio's latest fan upgrades.


  • Digital Class-D Mono Block Amplifier
  • Dual MOS-FET PWM Power Supply
  • 1 Ohm Stable Load
  • 12 dB/Octave – Variable Low Pass Filter
  • 0 to 12dB – Variable Bass Boost
  • 4 Way Protection Circuit (Thermal Voltage Speaker short and DC Offset)
  • Wired Remote Control with Clipping Indicator


  • Tested at 14.4 Volts
  • 1Ohm Mono: 1250W RMS
  • 2Ohm Mono: 1250W RMS
  • 4Ohm Mono: 800W RMS
  • Recommended Fuse Rating: 120A
  • Low Pass Filter: 40Hz – 20kHz
  • High Pass Filter: 10Hz – 1kHz
  • Level (Bass Boost): 0 – 12dB (50Hz)
  • Input Sensitivity: 5V Max
  • Single Noise Ratio: 108dB
  • Working Voltage: 10.5V – 15.5V DC
  • Dimensions (Inches): 5.71” x 7.28” x 2.44”