PBX-500.4 4ch Compact Amplifier

  • 1,000 Watt High Efficiency Full-Range Class D Design
  • 2-OHM Stable Four Channel Amplifier
  • Ultra Low Current Draw
  • Double Sided Copper Plated PCB
  • PWM MOSFET Power Supply
  • Digital Sound Optimization Circuitry
  • High Damping Control Circuit
  • Variable Subsonic Filter
  • High Current Voltage Ripple Rejection Circuitry
  • Balanced RCA Inputs
  • Auto Turn On/Off
  • Remote Soft Delay Turn On/Off Circuit 
  • 40 Click Variable Detente High/Low Pass Electronic Crossover
  • LPF / HPF / x10 BandPass Filter Selector Switch
  • Variable Gain Control
  • Protection Circuit: Impedance Over-load, Speaker Short, Circuit, Thermal Overheating, and DC Output
PBX-500.4 4ch Compact Amplifier
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The PowerBass PBX Series Amplifiers are the cleanest most efficient amplifiers we have built to date, with attention to sonic accuracy, clarity and a bold use of efficient power this series is guaranteed to have you smiling with pure musical enjoyment. 

PBX Ultra High Efficiency Amplifiers are the result of extensive engineering, and testing, to develop the best sounding and most efficient power delivery we have ever produced. with the success of our previous XMA Series our engineers went to work on the PBX Series with the goal of creating true works of art featuring high quality parts and an ultra efficient circuit design proving to be some of the best Class D amplifiers on the market today. 

The PBX Series represents the very latest in Class D technology.uses IR® (International Recti-fier) platform. IR®, a leader in PWM circuit design, has worked in conjunction with PowerBass engineers to produce more stable power output, minimal RF interference and improved sound quality.

Available in Full-Range Digital 4CH, 6CH and 5CH models as well as D-Class Mono Blocks from 800W to an astounding 3000W RMS the PBX Series has the power and channel configurations to meet the demands of the most demanding setups.  

Controlling your sound just got easier with the PBX-500.4 as we have added in multiple filter options from HPF, LPF and even BANDPASS network selection allowing you total control when tuning your system.  For more details please download the user manual. 


  • Peak Power: 1000 watts
  • Subwoofer Frequency Range: 10 Hz - 250 Hz
  • Dimensions (in Inches): 11.25x7x2.25
  • Depth: 11.25
  • Channels (mono): 4
  • 4-ohm Power: 125 watts x 4
  • 4-ohm Mono Power: 500 watts x 2
  • 2-ohm Power: 250 watts x 4
  • 1-ohm Mono Power: N/A
  • Variable Subsonic Freq: N/A
  • Height: 2.25
  • Width: 7
  • Low-Pass Crossover Freq: 25 Hz - 250 Hz
  • High-Pass Crossover Freq: 50 Hz - 350 Hz
  • Crossover Slope: 12 dB
  • Input Sensitivity: 0.25 V - 10.0 V
  • S/N Ratio: >90 dB
  • Strapped Output Power @ 2ohms: N/A
  • Output Power (14.4 V) @ 4 ohm: 125 watts x 4
  • Output Power (14.4 V) @ 2 ohm: 250 watts x 4
  • Output Power (14.4 V) @ 1 ohm: N/A
  • Frequency Response: 10 Hz - 40 kHz


PBX-500.4 4ch Compact Amplifier