OK. Thanks to all the positive reinforcement and my normal lack of self-control, I am now the proud owner of a Sunn Coliseum-300 amp! I ended up at $225 for it, and I darn sure won't let it go for that if I decide to re-sell at some point.
I tried it out and although I didn't have time to work out its functions, I confirmed that:
- All knobs and switches work. A couple of pots scratched a bit when exercising them, but that disappeared after they'd been worked a few times.
- Both inputs and speaker outputs work (didn't try all the aux ins and outs, not likely to be a problem anyway)
- The EQ on this thing is AMAZING. Huge boost and cut on each frequency - when it shows +15 to -15, they weren't kidding!
- As it should, the EQ settings have a significant effect on volume. Boosting or cutting any frequency from 0 results in big-time volume gains or cuts. (Of course - isn't that how a good EQ should work??)
One of its coolest features is on the back panel - a complete signal path schematic so that you always have a reference to the functions of each input, output and control.
Here's the collection of amps and speakers I now have....missing from this pic is my 1980's fender Bassman 120 combo with a single 15" speaker. Clockwise from bottom left - GK GLX410, Behringer BX4500H, 1967 Fender Bassman amp, Hartke 1400 anp, Sunn 300 Coliseum amp, Homemade 1x12 w.Carvin speaker, Peavey 1x15 with Eminence speaker, Ibanez SW35 combo amp.