Parasound HCA-855-A Brochure
High Current Amplifiers
Parasound’s High Current Amplifiers offer explosive power with uncompromised sound quality. Our focus
on a high current/high bias design influenced by John Curl, utilizes complimentary discrete circuitry to assure
every watt is crystal clear and available for crisp vocals, magnificent explosions, and dynamic music. Every
amplifier features 12 volt triggers, gain controls, and bullet-proof protection for ease of use and peace of mind.
Give us the most demanding music or the most action packed soundtrack, and you will love what you hear.
Features
High bias Class A/AB operation
Direct coupled - no capacitors or inductors in signal path
Input stages use hand matched complementary JFETs
20 matched 15 amp, 50 MHz bipolar output transistors
Massive 1 kVA toroid power transformer with
independent secondary windings for each channel
68,000 µF power supply filter capacitance
Independent power supplies for each channel
DC Servo and relay protection circuits
AC present, standby/normal, current overload indicators
Gold plated RCA input jacks
12 volt DC automatic turn-on circuitry
Heavy duty 24k 5-way speaker binding posts
Rear mounted gain controls and rear handles
Rack mounting adapter available
Parasound’s 10 years parts, 5 years labor warranty
Specifications
Continuous power output:
85 watts RMS x 5, 20 Hz - 20 kHz, 8Ω, all channels driven
125 watts RMS x 5, 20 Hz - 20 kHz, 4Ω, all channels driven
Current capacity: 30 amperes peak per channel
Power bandwidth: 5 Hz - 100 kHz, +0/-3 dB at 1 watt
Total harmonic distortion: < 0.03 % at full power
IM distortion: < 0.03 %
Slew Rate: > 130 V/µsecond
Dynamic headroom: > 1.5 dB
Interchannel crosstalk: > 80 dB at 1 kHz; > 60 dB at 20 kHz
Input impedance: 33 kΩ
Input sensitivity: 1 V for 28.28 V, 1.2 V for full output
S/N ratio: > 115 dB, full power, IHF A-weighted
Damping Factor: > 800 at 20 Hz
Dimensions: 17" w x 6" h x 16" d, 5-1/4" h without feet
Net weight: 41 lbs.
Parasound Products, Inc. 950 Battery Street, San Francisco, CA 94111
415-397-7100 / FAX 415-397-0144 www.parasound.com
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