Parasound

A 31

$4,650.00
  • A 31
A 31 A 31 A 31 A 31

Parasound

A 31

$4,650.00

Description

The Parasound HALO A31 multichannel amplifier is a power amplifier that draws directly from the hefty lineage of the 5 channel A51. Like it's bigger brother - the it's also a THX Ultra 2 certified product, but the interesting backdrop to the A 31 is that it was designed in response to increasing demand for a three channel power amp that holds nothing back in power or performance. So the A 31 is identical in performance and sound to the award winning Halo A 51.

Specifications and 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
  • 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
  • Continuous power output:
    250 watts RMS x 3, 20 Hz - 20 kHz, 8 Ω, all channels driven
    400 watts RMS x 3, 20 Hz - 20 kHz, 4 Ω, all channels driven
  • Current capacity: 60 amperes peak per channel
  • Power bandwidth: 5 Hz - 100 kHz, +0/-3 dB at 1 watt
  • Total harmonic distortion: < 0.2 % at full power
  • IM distortion: balanced 16 V rms < 0.04 %
  • Slew rate: > 130 V/µsecond
  • Dynamic headroom: > 1.5 dB
  • Interchannel crosstalk:
    > 78 dB at 1 kHz;
    > 63 dB at 20 kHz
  • Input sensitivity: 1 V for 28.28 V (THX Reference)
  • Input impedance: 47 k Ω unbalanced; 94 k Ω balanced
  • S/N ratio: 112 dB, input shorted, IHF A-weighted
  • Damping factor: > 1100 at 20 Hz
  • Dimensions: 17-1/2" w x 7-5/8" h x 20" d, 7" h without feet