Parasound Halo A31 Three-Channel Power Amplifier

Sale price$4,199

Parasound Halo A31 Three-Channel Power Amplifier

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
  • 4u Chassis, carry handles, rack mounting adapter included

Specifications

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 < 0.04 % (balanced 16 V rms)
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
Net Weight 65 lb.
Shipping Weight 79 lb.

Description

Parasound Halo A31 Three-Channel Power Amplifier

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
  • 4u Chassis, carry handles, rack mounting adapter included

Specifications

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 < 0.04 % (balanced 16 V rms)
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
Net Weight 65 lb.
Shipping Weight 79 lb.

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