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Parasound Halo A 31 Three-Channel Power Amplifier

Parasound Halo A 31 Three-Channel Power Amplifier

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Regular price $4,199 In stock now!
Regular price $4,199 Sale price $4,199 In stock now!
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Parasound Halo A 31 Three-Channel Power Amplifier

A 250 W, high-bias class A and AB amp designed by John Curl. THX Ultra2 certified.

With circuitry designed by the legendary John Curl, the Parasound Halo A 31 is a high-bias class-A with AB operation that will deliver monster power to your front left, front right, and center speakers in a three or more channel home theater setup. 

With a power delivery of 250 W per channel, and adjustable gain to +6 dB over THX Reference level, the Halo A 31 will fill any room, with headroom to spare.

The JFET input stage is connected to a MOSFET driver stage, and the amp uses 24 beta-matched 15 ampere, 60 MHz bipolar output transistors. The 65 lb. amp uses a 1.5 kVA encapsulated toroidal transformer with independent windings for each channel. The output stage uses 98,400 µF filter capacitors. 


  • DC Servo and relay protection circuits
  • AC turn-on inrush surge protection with relay bypass
  • THX Ultra2 certified
  • Automatic turn-on by 12 V trigger or audio sensing
  • 4 rack space chassis with rear carry handles
  • Rack mount hardware included


Power Output (8, 4 ohm): 250 W, 400 W

Inputs: 3 x RCA, 3 x XLR, DC trigger

Input Impedance (Bal., SE): 94 kΩ, 47 kΩ

Dimensions (WHD): 17-1/2" x 7-1/8" x 20"

Weight: 65 lb.