Dynaco st-80 (don't laugh!!!) (original early solid state from the 70s.) This is NOT the same as the st-120. Unlike the 120, this has a simple unregulated power supply, a single pair of quasi-complimentary transistors per channel and BIG output coupling caps. Also, the st-80 does NOT use the induction coil as part of the feedback loop. Open, effortless sound, good bass, natural mids. Amazingly good after simple cap upgrade, I've compared to Belles Gala, Van Alstine, Pass x5, various EL34 imports, etc. I own just a few amps now, this one is a keeper. An all-purpose machine, drives everything from tang band se drivers to big old ARs and everything in between.