Audio Research GS150 vs REF150 SE

I have listened to the Ref 150SE extensively and owned the GS150 before moving up to the Ref 250SE’s. The Ref 150SE is a better sounding amplifier and was magical with the Wilson Alexia II’s in a recent audition of the Wilson speakers. When my dealer replaced the Ref 150SE with the GS150 amp in the same listening session the magic went away. We were both surprised with the result especially since the GS150 is more expensive than the Ref 150SE. Maybe this is why the GS150 is being discontinued.

 I always like to hear a piece in my system before I decide to buy it. But if you buy a Ref 150se used at a good price. You can sell it and not take much of a loss if you don't like it.

 ARC has had some amazing pieces and some that were just so so. The Classic series and later V series were ground breaking. My Classic 60 was just so much better than my D70 it was amazing. But after the V series there were no real stand outs until The Ref 110. With the possible exception of the VT130. I had a VT100 mk3 for a number of years. Originally I was going to sell my V70 but found I really just preferred the V70. The VT100 did a lot of things better but it lacked presence. The VT100 lacked that rightness. It was not until the Ref 110 did I feel I could finally sell my V70. The Ref 110 has the best attributes of both. I think the Ref 150se does also. But what matters is how it sounds to you in your system.

  If you buy a new amp I still wouldn't sell the Classic 120s if it were me. I wish I would have kept my V70.

Good point about selling my Classic 120’s prior to auditioning a 150SE in my room with my speakers as I wouldn’t want to put myself in your situation with your V70. 

A friend of mine had purchased a V70 used and he did not like the sound in his room with his speakers so it went in the closet for 15 years until he decided to part with it. He listed it on Canuck Audiomart and it sold within a couple of hours of being listed. 

You seldom see a Classic 30, 60, or 120’s for sale on agon. I haven’t seen a pair of 120’s listed here in recent years anyway. The V series is actually the Classic series with balanced input and was not in production for very long before being discontinued. 

Speaking with Chris Osanna at ARC a few years ago about using KT120 in the 120’s (which he did not recommend) he was telling me that they rarely see any of the Classic series amps coming through their repair shop other than for tubes and filter caps replacement. 
He said that those were probably the most reliable pieces (built like tanks) in their amp line. I can certainly vouch for that with the experience I have had with mine.

I had the REF 150SE amps and recently have moved into the GS150. I have never regretted selling the 150SE amps.
Forget about anyone referring to 'magic.'  That is total nonsense. The GS150 amp really delivers the goods without any need for 'magic.'
The GS150 is a far more advanced amp that previous generations like the 150SE.  It is a balanced configuration and required a balance preamp.The GS150's 155 watts provides more than adequate power with generous headroom from its four KT150 output tubes.  provides tonal richness, full bass response, and an uncanny ability to create a sense of 3 dimensional space. Its sound is liquid, sweetly musical and so very engaging. The texture of the instruments was impressively tactile and so very realistic. There is no harshness or hard analytical edginess, whatsoever.  This GS150 provides true high end audio experience.
Also, he cosmetics of the GS are awesome. The giant three illuminated meters are gorgeous and very functional. The new ARC style is a winner.