This is a vintage Avery Fisher power amp. It's from a console, but don't let that fool you, it's a fantastic amp! It uses one 12AX7 and a pair of EL84's per channel to produce about 15 watts. And it's some of the best 15 watts I've heard. One of my current favorites for the original Quad ESL's It's called the SA-16.
Fisher SA-16 schematic (98 K)