PS audio hca 2 feedback...

Speed, detail and transparency are all pretty good and arguably superior in its price bracket. Bass is very good, maybe even excellent. Midrange is reasonably neutral, not warm, not dry. Upper end is oh-so-slightly tizzy, can be ameliorated by a tube preamp. Excellent buy, esp used. Very good support from the company. I sold mine to go all tube, though if I had to get an SS amp I would look at this one again. The companion preamp is highly featured but the lesser performer of the two, I thought a touch on the dry side. I understand the GCC/GCA replacement is noticeably better but no personal experience.

All of the above IMO/IMS.

Agree with Kck on all counts (re: HCA-2). The upper mids on up can be improved, if desired, with simple cap and wire upgrades (see thread at Audio Asylum, or these can be done by a modder like RAM). There's some stiff competition coming out from the likes of Nuforce, Bel Canto, CI Audio and others in the inexpensive but excellent-sounding digital amp parade, but if you're looking used the HCA-2 is tough to beat for the price.

Agree, with Kck and Richards. In my case, a particular asset is the HCA-2's indifference to the low impedance of my Maggie 1.6's. I use the HCA-2 with a tubed preamp with adjustable gain. The pre sounds best set to it's lowest gain, so the rather high gain of the HCA-2 is a benefit in this scenario. I had been rather frustrated with the 1.6's until I tried the HCA-2. It has proven to be an excellent performer, especially for the price. I did have some problems at first that required a trip back to the manufacturer and I have received excelllent, fast service/support.

Photon46, you reminded me that the HCA-2, against my 4 ohm speakers, succeeded in driving them with ease where nominally more powerful amps had shown weakness. One could do a lot worse for the money, well under $1K used. I can't imagine this amp would not benefit any moderate (under $5K total) system. Kudos to PSA for being one of the first to execute such a design with grace, style AND economy.

VALUE!!! While my HCA is no longer my primary amplifier, it's now powering my outdoor system. Decoupled the transformer from the chassis, Black Gate caps, and a beefy DIY shielded AC chord, made a considerable improvement. I wouldn't hesitate to suggest a used one and have the full RAM mods done.

I didn't experience any of the high or mid range issues mentioned above and I went from a tube preamp to solid state/battery. Upgrades in digital playback, phono cartridge, and speaker system, were clearly noticible using the HCA. At first the bass seemed only slightly thin until I compared it to a couple of amps that are famous for their bass reproduction and upgraded my preamp. I preferred the more precise rendition of the HCA, and I'm not calling it tight, rather much more accurate in timbre. While the other two had more of that flabby bass that many seem to enjoy, the HCA has the ability to start the note quicker than the others, IMO.