Parasound Halo A-21 2 Channel Power Amp

Parasound Halo A 21 THX
Ultra II Power amplifier is fully functional and in excellent
condition.  

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 

Features: 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 100,000 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 4u Chassis