Parasound Halo A31 Three-Channel Power Amplifier

$4,199

Quantity:

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.

$4,199