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Parasound Halo A 31

3-channel power amplifier

Key Features

  • 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

FEATURED REVIEW


CUSTOMER Q & A

question

Answers

Parasound has been making their Halo line of products for quite a few years now, but they are not one to make updates for the sake of change. Offering the same 250 WPC into 8 ohms and 400 WPC into 4 ohms that the A21 and A 51 do, the A 31 makes an ideal mate for your front three speakers without having to spend money on extra power for surround channels that may not need it. With the balanced inputs, it also allows you to keep the amplifier close to the front channels, allowing for shorter, more convenient speaker cable runs and longer runs of the balanced interconnects that are less prone to picking up noise.

Product Highlights

  • 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 independent
  • secondary 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

Dimensions & Warranty

  • 17.5" W x 7.6" H x 20" D
  • Weight: 65 lbs
  • Our 30-day money-back guarantee

Additional information

Brand

Parasound

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