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$500.00 CAD

ACS-Series Class A/B 4 Channel Amplifier

Model No: ACS4090


PowerBass is pleased to introduce our newest addition to our series of Class A/B full range and Class D bass amplifiers. Borrowing from our classic ASA series, these new amplifiers offer the most desired features in the most compact chassis allowable. To accomplish this we selected SMD parts and engineered an brand new 6 oz/kg high density heat sink engineered for maximum efficiency and cooling.

Additional information

Weight 6 lbs
Dimensions 15.4 × 9.3 × 3.5 in




  • 4-Channel 480 Watt High Efficiency Class A/B Design
  • 2-ohm Stable (4-ohm in Bridged Mode)
  • MOSFET Power Supply
  • High Level (Speaker)/Low Level (RCA) Input
  • Remote Soft Delay Turn On/Off Circuit
  • Variable Low Pass Electronic Crossover
  • Selectable 12dB Bass Boost EQ
  • Variable Gain Control
  • Remote Level Control Port (for optional PB-GAIN1 controller)
  • Protection Circuit: Impedance Over-load, Speaker Short, Circuit, Thermal Overheating, and DC Output.


  • Inputs: RCA, 2 Pairs Input, 2 Pair Speaker Level Input
  • 4-ohm Mono Power 180 watts x 2
  • 4-ohm Power: 45 watts x 4
  • 1-ohm Mono Power: N/A
  • 2-ohm Power: 90 watts x 4
  • Dimensions (in Inches): 12.8" x 7.1" x 2.0"