Parasound A 51 5 Channel Power Amplifer

Description

The Parasound A 51 five-channel power amplifier delivers 250 watts of Class A/AB power into 8 Ohm and 400 watts into 4 Ohm. As part of Parasound’s Halo amplification series designed by the legendary John Curl you are guaranteed powerful precise sound, the A 51 will perform even in the largest of cinema rooms. Sydney Hi-Fi Castle Hill uses the Parasound Halo series extensively when designing and installing Trinnov immersive audio cinemas.

Parasound A 51 Features and Specifications:

•  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 the 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:
250 watts RMS x 5, 20 Hz – 20 kHz, 8 Ω, all channels driven
400 watts RMS x 5, 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: 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

        Dimensions:
17-1/4″ w x 7-5/8″ h x 20″ d, 7″ h without feet

        Net weight: 80 lb.