Parasound A23 Two Channel Power Amplifier

Description

• Circuitry designed by legendary John Curl
•  Lucasfilm Home 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
•  12 beta-matched 15 amp, 60 MHz bipolar output transistors
•  1 kVA encapsulated toroid power transformer with independent
  secondary windings for each channel
•  48,000 µF power supply filter capacitance
•  DC Servo and relay protection circuits
•  AC present, channel status, high temperature displays
•  Heavy-duty 24k gold-plated 5-way speaker binding posts
•  Gold-plated RCA input jacks; loop output jacks
•  Auto turn-on by 12v trigger or audio signal
•  Rear mounted gain controls, ground lift switch
•  2u Chassis, carry handles, rack mountable with HRA2 (sold separately)

Continuous power output:
125 watts RMS x 2, 20 Hz – 20 kHz, 8 ?, both channels driven
225 watts RMS x 2, 20 Hz – 20 kHz, 4 ?, both channels driven
400 watts RMS x 1, 20 Hz – 20 kHz, 8 ?

        Current capacity:
45 amperes peak per channel

        Power bandwidth:
5 Hz – 100 kHz, +0/-3 dB at 1 watt

        Total harmonic distortion:
< 0.06 % at full power

        IM distortion: balanced 16 V rms
< 0.04 %

        Slew rate:
> 130 V/µsecond

        Dynamic headroom:
> 1.5 dB

        Interchannel crosstalk:
> 80 dB at 1 kHz;
> 63 dB at 20 kHz

        Input sensitivity:
1 V for 28.28 V, THX Reference Level

        Input impedance:
33 k ?

        S/N ratio:
112 dB, input shorted, IHF A-weighted

        Damping factor:
> 800 at 20 Hz

        Voltage:
Switchable for 110V – 120V or 220V – 240V

        Dimensions:
17-1/4″ w x 4-1/8″ h x 13-1/4″ d, 3-5/8 ” h without feet

        Net weight: 28 lb.