Old Amps that can still Kick Butt


Not being a believer that time necessarily = progress, I would like to offer the following example of a sonic gem that has transcended time and can totally kick butt in a modern milieu:

The Robertson 4010. I got one of these about two years ago because it was in immaculate condition, the price was so low and I was inquisitive. I hooked it up and let it warm up for a couple of days. OMG this thing was in the super amp league: Transparency to die for, slam that you couldn‘t‘ believe for for a 50W amp.. Peter Moncrieffe wasn‘t wrong in his review of this amp: this thing is in the Sterreophile Class A component category hands down. Even after all these years.

What amps have you encountered that have defied time and can still kick butt today?


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One of my all time favorites was the old mid 80s PSE Studio II (80/150W) paired with my Audible Illusions - Modulus II Pre. driving Vandi 2Cis and then in the early 90s upgraded to the  Studio IV. (100/195W) driving my Quad ESL 63s. Incredible sounding and performing amplifiers. By anyone's standard, then and even now, might be considered sonic gems......Jim 
I still enjoy my 35 year old Tandberg 3006A with 3008A preamp driving ADS L1290s in my second system. Very easy to listen to.
I have a pair of  McIntosh 501 mono blocks, 18 years old and Still Kick Ass!  750 bench measured watts!  My Maggie’s love the current.