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?


128x128pesky_wabbit
McCormack DNA: Excellent when new 30 years ago, phenomenal when rebuilt by the designer at SMc Audio. 
VAC  PA 90D. Still, a truly wonderful amp. Looks great, sounds even better. 
I'm just an amateur here, but have been using a pair of MFA M-200's for over 20 years. Paired with GAS Thaedra that I bought in the mid 70's and have maintained well.