Naturally, being in Lake Oswego, OR, I had to try this when I saw it. Real cool tone. Very meaty. Uses two 6550 power tubes, and 4 12AX7s in the pre. So, I bought it (naturally, 1 week after buying a '79 Fender Twin Reverb!) Now the questions: I can't find ANY information on the web about this amp, let alone a copy of the owners manual. I'd like to know more about the speakers (like, who built them?), what that gold tube thingy is hanging down off the chassis (in the photo of the back, on the left hand side), and how the amp is regarded generally. Does anyone know anything about this amp? The pot codes date from 1972, and what I assume to be the Q&A sticker is 1974, so I'm thinking this is a 1974 amp. Except for the replaced volume knob, it's in almost like new condition. Clearly not gigged with. Tubes have been swapped (6550 are Winged =C=, although they look to be fairly old, and all the 12AX7s are JJs), but for kicks I ordered some 6550 JJ's and some Mullards to see what that does. The channels and gain settings are really fun. The Channel 1 has Volume, Bass, Treble, and Hi Boost (like a Bright switch). The Channel 2 has Volume, Bass, Mid, and Treble. But above the mid is a selector switch that lets you choose between 750, 1.5k, and 3k. Also, the Channel has a Hi Boost like Channel 1, and Gain Boost switch that lets you choose between Lo, Normal, and Distort. Very interesting. The reverb is selectable to either channel or both, and each channel has a Hi and Lo input. Lastly, it has Master Volume shared by both channels. The reverb is foot switch controlled, but there is no channel switching! This is easily remedied with an A/B footswitch though. Anywhooo. Any additional info or comments would be appreciated. Be sure to read the reverb sticker!