Hidden Gems in Pre-Owned Solid State Power Amplifiers?

avanti1960

What are the true audiophile gems in the pre-owned solid state market?

Audio Research D-200, D-300.

@soix 
With SMc Audio's newer upgrades, they literally only use the chassis and heat sinks and virtually everything else, including the boards, is replaced.  Steve has my pair of DNA-1s that he is doing his "everything" upgrades to, including his new Gravity Base System that is supposed to make a substantial improvement.  I believe there are currently only a few amplifiers with this particular upgrade and I have read three owner testimonials, which are all very positive.  Mine will have new faceplates and should look and sound like substantially different/better amplifiers.

They are all up for sale for a reason.

Happy Listening

Parasound HCA series. John Curl design. Still sounds like magic. From early 90’s and can be had for a bargain. 

Aloia amps. They are 2 pieces (separate the power supply) and sound wonderful.