FS: Parasound HCA-806 6ch x 80W SF Bay Area, CA - diyAudio
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Old 2nd July 2011, 03:27 PM   #1
diyAudio Member
Join Date: Mar 2007
Location: California
Default FS: Parasound HCA-806 6ch x 80W SF Bay Area, CA

I'm selling my backup Parasound 6-channel amp on Ebay, and I thought I would give it a little plug here. Ebay link:
PARASOUND HCA-806 for sale

This is a very beefy amp, with a massive toroidal transformer. Per channel power is 80W x 6 with headroom into 8 ohms, 120W x 6 with headroom into 4 ohms and two pairs of channels can be bridged to get 180WPC in to 8 ohms. All channels have rear panel input attenuators, which can be dialed down to allow you to use the full output volume range of your pre-amp, which maximizes the signal-to-noise ratio.

All the output relays were recently replaced with new units using Parasound parts. The original relay contacts had developed a lot of oxidation, and the sound was intermittent in several of the channels as a result. It's a common problem after 10+ years for these amps but now it's functioning perfectly again.

Cosmetics are very good. There are only a couple of minor dings that you can see in the pics in the Ebay auction. I will be happy to provide additional hi-res pics upon request. All in all it is a very nice looking piece. It's pretty heavy, though, on account of the large toroidal tranny and heatsinks. Local pickup would save $$$ on shipping, and would be willing to meet people anywhere without about 1 hour of zip code 95616 for a handover, for instance to meet around Berkeley, Petaluma, or Walnut Creek would be no problem.

This is a great amp for 3-way active speaker projects and has more than enough power to blow you away when used in that way. The other amp that I own of this model seems to be bombproof, so I am selling this one to raise some cash for other speaker projects that I am working, that will have the amps built in to the speaker directly.

Below are some representative images of the amp. For some pictures of the amp for sale, which looks exactly like this, see the Ebay link. Scroll down to the bottom to read the technical specs from the manual.

I'm asking $450 for the amp, but will consider reasonable offers. Because of the weight and cost, I am not willing to ship it outside of the USA.


Click the image to open in full size.Click the image to open in full size.
Click the image to open in full size.

Features and specs:

Massive 1.2 kVA Power Transformer
90,000 uF Computer-grade Capacitors in the Power Supply
Multiple Polystyrene Film Bypass Capacitors in the Power Supply
Cascode Class A Input Stages with Matched J-FET Pairs
Hand Picked Complementary Transistors in High Voltage Driver Stages
24 50 MHz, 15 Ampere Output Transistors, Beta-Matched Complementary Pairs
Can be powered with external DC source
Output Transistors Direct-Coupled to Speakers Without LRC Networks
Linear Tracking, Instantaneous Acting DC Servos
High-Bias Class A/AB Operation
Gold-Plated Metal Structure RCA Input Jacks
Multiple Temperature Sensors and Silver-Cadmium Relay Protection
FR-4 Glass Epoxy Circuit Boards, Double-Sided for Precision
Proprietary Quick-Settling Bias Circuits Obviates Warm-Up Period
Custom Designed Audiophile-Grade AC Power Cord
Configurable for Multi-Channel Home Theater, Multi-Zone Stereo, Biamp or Triamp Operation


Continuous Power Output
> 80 watts RMS x 6, 20 Hz - 20 kHz, 8 Ω, all channels driven
> 120 watts RMS x 6, 20 Hz - 20 kHz, 4 Ω, all channels driven
Continuous Power Output - Bridged
> 180 watts RMS, 20 Hz - 20 kHz, 8, each bridged channel, 3+4, 5+6
Current Capacity
30 amperes peak, per channel
Slew Rate
> 130 V/µsecond
Frequency Response
20 Hz - 120 kHz, +O/-3 dB
Total Harmonic Distortion
< 0.05% at full power < 0.02% typical levels
lM Distortion
< 0.03%
Dynamic Headroom
> 2 dB
lnterchannel Crosstalk
> 75 dB at 1 kHz
> 55 dB at 20 kHz
Input Impedances
50k Ω per channel, without looping inputs 1/2 to Ch. 3/4 or Ch. 5/6
25k Ω per channel, if looping inputs 1/2 to either Ch. 3/4 or Ch. 5/6
17k Ω per channel, if looping inputs 1/2 to both Ch. 3/4 and Ch. 5/6
Input Sensitivity
1.0 V
S/N Ratio
> 118 dB, input shorted, IHF A-weighted
Damping Factor
> 800 at 20 Hz
19" wide x 5 1/4 " high x 18.5 " deep (6 1/8 high with feet)
50 lbs. net
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Old 6th July 2011, 05:47 PM   #2
diyAudio Member
Join Date: Mar 2007
Location: California
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Old 7th July 2011, 10:27 PM   #3
diyAudio Member
Join Date: Mar 2007
Location: California
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Old 4th March 2016, 02:38 AM   #4
diyAudio Member
Join Date: Jan 2006
Location: Athens, Georgia, US
Default Band limited signal, bridged, stable into 4 ohms?

Old thread I know. Would those bridged channels hold up, band pass input 80--2Khz, driving a 4 ohm load?

I'm considering one of these to tri-amp my center channel.
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