Welcome to Dusonav. Fantastic Beautifully designed
Category: Power Amplifiers

Parasound Halo A31- 3 Channel Power Amplifier (Black)

Key Features

  • High-current 3-channel Class AB power amplifier designed for premium home theatre and multi-channel audio systems

  • Delivers powerful, clean, and dynamic performance across all three channels with excellent channel separation

  • High output power per channel ensures effortless drive for demanding loudspeakers

  • Massive toroidal power transformer with substantial energy storage for stable, high-current delivery

  • Balanced (XLR) and unbalanced (RCA) inputs for flexible integration with AV processors and preamplifiers

  • Independent gain controls for each channel allow precise level matching in surround systems

  • Extremely low noise floor and low distortion for transparent, detailed sound reproduction

  • Advanced thermal, over-current, and DC protection circuits safeguard both amplifier and speakers

  • Automatic turn-on options via 12V trigger or audio signal sensing

  • Heavy-duty, resonance-resistant chassis for long-term reliability and minimal vibration

  • Ideal for powering front left, center, and right speakers in high-performance home cinema setups

Description

 

A 31 Three-Channel Power Amplifier

  • 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 the 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

 

 

Specifications

Continuous power output

250 watts RMS x 3, 20 Hz – 20 kHz, 8 Ω, all channels driven400 watts RMS x 3, 20 Hz – 20 kHz, 4 Ω, all channels driven

IM distortion

balanced 16 V rms< 0.04 %

Input impedance

47 k Ω unbalanced; 94 k Ω balanced

Current capacity

60 amperes peak per channel

Slew rate

> 130 V/µsecond

S/N ratio

112 dB, input shorted, IHF A-weighted

Dynamic headroom

> 1.5 dB

Damping factor

> 1100 at 20 Hz

Power bandwidth

5 Hz – 100 kHz, +0/-3 dB at 1 watt

Interchannel crosstalk

> 78 dB at 1 kHz;> 63 dB at 20 kHz

Dimensions

17-1/2″ w x 7-5/8″ h x 20″ d, 7″ h without feet

Total harmonic distortion

< 0.2 % at full power

Net weight

65 lb.

Shipping weight

79 lb.

Customer Reviews

No reviews yet.