Four Channel Analog Filtering Amplifier

The PAS-A4100 delivers up to 100 watts of power to each of four independent channels. It is bridgeable in pairs- doubling the output and enabling 2, 3 or 4-channel configuration.


The PAS-A4100 is designed for flexibility and convenience for the vast majority of distributed audio and home entertainment applications. This single rack-mount chassis is powerful, easy to configure and install.

The PAS-A4100 delivers up to 100 watts of power to each of four independent channels. It is bridgeable in pairs—doubling the output and enabling two, three, or four channel configuration.

Additionally, each channel has two selectable analog high pass filters. These filters are critical to optimize the performance of connected satellite speakers or subwoofers, without the hassle of DSP or IP.

Independent level control allows you to trim the signal for lower output to small speakers or turn all the way up for max power. The amplifier is stable at a low impedance, so it can drive multiple satellite speakers or a subwoofer from each channel.

Preamp outputs on every channel allow for patching to an adjacent channel or sending the signal to another device. Audio sensing, and in-&-out triggers add power management convenience. Each channel has a signal and clipping indicator located on the brushed aluminum front panel for easy troubleshooting and signal verification. Rack ears and tabletop feet are included for mounting options.


  • Master Power Button 
    Includes turn-on circuitry
  • Status Display for Troubleshooting 
    Channel indicators light up green when signal is present and red when clipping
  • Bicolor Status LED
    Illuminates blue when the amplifier circuitry is turned on by the Turn-on circuits, and illuminates red to indicate activation of the amplifier’s built-in protection circuitry 
  • 4 Independent Channels Up to 100 Watts @ 8 Ohms 
    Ample power to drive subwoofers and multiple satellite speakers
  • Selectable Analog Filters
    Built-in 3-position switch filters low/full-range/high-pass audio signals for each amplifier output
  • Turn-On Modes
    Audio signal sense Normal – always on Trigger voltage
  • Audio Input Level Controls
    Rear panel adjustment dials allows for independent source matching or limit maximum safe volume
  • Trigger Input
    3-24VAC or DC 20mA
  • Trigger Output
    12VDC max 150mA


Specifications Values
Max Load 3x 8ohm Speakers per Channel
Channels 4
Power Output per Channel 100w @ 8ohms
Rated Power 70 W
Input Sensitivity 0.08V
Gain 30 dB
THD+N 0.05
Frequency Response at 1W 20~20K
S/N Ratio 98dB
Auto Sens Level 5mV
Crosstalk at 1KHz 80dB
Crosstalk at 10KHz 70dB
Noise 0.3mV
Dimensions (L x W x H) 11.5 x 17 x 1.5 in