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Parasound A21 power amplifier

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Item Condition: Used
Shipping Options: Pickup available and you can audition.
Suburb or Town: Revesby
State: NSW
Payment Method: Cash
Reason for selling: Upgrading

Further Information

Continuous power output:
250 watts RMS x 2, 20 Hz - 20 kHz, 8 Ω, all channels driven
400 watts RMS x 2, 20 Hz - 20 kHz, 4 Ω, all channels driven
750 watts RMS x 1, 20 Hz - 20 kHz, 8 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


Damping factor: > 1100 at 20 Hz


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

16 beta-matched 15 amp, 60 MHz bipolar output transistors

1.2 kVA encapsulated toroid power transformer with independent secondary windings for each channel

88,000 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, 12v trigger out




A21 rear.jpg

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