HALO A51 power amp


Price:
Sale price£10,499.00

The Parasound HALO A51 multichannel amplifier is a power amplifier with huge presence and poise - befitting of it's legendary designer John Curl.

The HALO A51 is a thoroughbred THX Ultra2 certified, high bias Class A/AB amplifier that gives you the optimal amount of performance that only most really high end systems achieve, again nailing Parasound's colours to the mast when it comes to that getting the maximum 'bang for your buck'.

The A51 is perfect for any higher end multi-channel application, and will drive the most demanding of loads within a system - so it is perfect not only for very good quality high-end cinema installations or custom installation in-wall systems, but obviously is equally sure footed with large floor-standing speakers as well. The root of this adaptability is primarily it's 2.2 kVA encapsulated toroid power transformer with independent secondary windings for each channel, plus the A51's high bias class A/AB operation working in tandem with it's directly coupled design (there are no capacitors or inductors in signal path). 

250 watts x 2 @ 8 Ω RMS, both channels driven
400 watts x 2 @ 4 Ω RMS, both channels driven
Circuitry designed by legendary John Curl
THX Ultra2 certified
High bias Class A/AB operation
Balanced inputs with discrete circuits and XLR connectors
Direct Coupled - no capacitors or inductors in signal path
Complementary MOSFET driver stage and JFET input stage
40 beta-matched 15 amp, 60 MHz bipolar output transistors
2.2 kVA encapsulated toroid power transformer with independent secondary windings for each channel
164,000 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
Gold-plated RCA input jacks; ground lift switch
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 5, 20 Hz - 20 kHz @ 8 Ω
 400 watts RMS x 5, 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 Lev)
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
Voltage: 110V - 120V
Width: 445 mm
Panel height: 178 mm
Height with feet: 194 mm
Depth: 508 mm
Net weight: 36.4 kg

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