HALO A31 power amp


Price:
Sale price£6,699.00

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.

Here are a few of the many applications for the A 31:

1) To power the front three channels of a home theatre. The surround or back channels can then be powered by a smaller 2ch Parasound power amp such as the Halo A 23. This gives the greatest power to the front channels where it is needed the most.

2) To power the centre channel and two surround channels. This allows the Left and Right front speakers to be powered by a dedicated two channel power amp such as the Halo A 21, or better yet, two JC 1 monoblocks. This is ideal for the music lover who is unwilling to compromise stereo reproduction.

3) To power the front three channels in an AV receiver‐based system. The remaining surround and back channels can be driven by the receiver. This assures you the best sound for the front channels while enabling the AVR to produce more power for the surround and back channels. However you employ the A 31, you will be delighted by its impeccable sonics, striking authority and faithful reproduction of the smallest details.

250 watts x 2 @ 8 Ω RMS, both channels driven
400 watts x 2 @ 4 Ω RMS, both channels driven
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

Continuous power output (all channels driven):
 250 watts RMS x 3, 20 Hz - 20 kHz @ 8 Ω
 400 watts RMS x 3, 20 Hz - 20 kHz @ 4 Ω
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
Power Requirement
 Standby: 1 Watt
 Maximum: 1800 Watts
Width: 445 mm
Height with feet: 194 mm
Depth: 485 mm
Net Weight: 29.5 kg

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