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Power Amplifiers : Parasound Halo A21 THX Ultra2 250w X 2 Amplifier A 21 Features: Circuitry designed by legendary John Curl THX Ultra 2 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 Gold-plated RCA input jacks, loop output jacks Heavy-duty 24k gold-plated 5-way speaker binding posts Auto turn-on by 12v trigger or audio signal, 12v trigger out Rear panel gain controls; ground lift switch 4u Chassis; carry handles; rack mounting adapter included Parasound's 10 years parts, 5 years labor warranty A 21 Specs: Continuous power output: 250 watts RMS x 2, 20 Hz - 20 kHz, 8 W, both channels driven 400 watts RMS x 2, 20 Hz - 20 kHz, 4 W, both channels driven 750 watts RMS x 1, 20 Hz - 20 kHz, 8 W 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: < 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 W unbalanced; 66 k W 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 19-1/8" d, 7" h without feet Net weight: 60 lbs. Audioholics, December 2004 Product of the Year Award 2004 - Two-Channel Power Amplifier "For those who desire the power of a Mack truck with the finesse of a Mercedes Benz in a two-channel amplifier, look no further than Parasound." "With the assortment of unbalanced and balanced inputs, triggered output, and ground lift option no stones were left unturned with this well built, attractive design." Audioholics, October 2004 "The A 21 and A 51 amplifiers are both loaded with usable features above and beyond most other amplifiers in today's market." "I cranked the volume way up and found myself free of that inhibiting audio alarm in my head that nags at me to turn it back down. Using the Parasound amp allowed my speakers to portray every aspect that I had come to expect without adding any noticeable sign of distortion or flaw." "The Parasound Halo A 21 and A 51 are top rate amplifiers at a great value. Parasound seems to have attended to every aspect of their design including the excellent build quality internally and externally matched with great looks." Overall Rating: 5/5 Stars - Ken Stein and Steve Dellasala This item is only available to our South Florida customers at our West Palm Beach showroom. No internet / mail order sales unless otherwise indicated.     ID: A21 Visit our showroom or  Email   us about this item! $2,299.00