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Parasound Halo Three-Channel Power Amplifier-Black

Model #: A 31
At a Glance

Parasound Halo Three-Channel Power Amplifier-Black with auto turn-on by 12v trigger or audio signal

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$99,999.00Save $NaN

Get to know this product.

  • 250 watts x 3 @ 8 Ohms / 400 watts x 3 @ 4 Ohms
  • Adjustable gain for up to +6db over THX Reference level
  • Unbalanced RCA and balanced XLR inputs
  • Circuitry designed by legendary John Curl
  • High bias class A/AB operation
  • Direct coupled (no capacitors or inductors in signal path)
  • Complementary MOSFET driver stage and JFET input stage
  • 24 beta-matched 15 amp, 60 MHz bipolar output transistors
  • 1.5 kVA encapsulated toroid power transformer with independentsecondary windings for each channel
  • 98,400 µF power supply filter capacitance
  • DC Servo and relay protection circuits
  • AC present, channel status, high temperature indicators
  • Heavy-duty 24k gold-plated 5-way speaker terminals
  • THX Ultra2 certified
  • Auto turn-on by 12v trigger or audio signal
  • 4u Chassis, carry handles, rack mounting adapter included


Signal to Noise Ratio:112 dB
Watts RMS per Channel (4-ohms):400
Watts RMS per Channel (8-ohms):250



Misc. Specs

Depth (in.)19.13
Height (in.)7.63
Impedance94 k Ohms
Width (in.)17.5
Analog Audio(RCA) Input3
Product Weight65
WarningProposition 65 Warning for California Residents