I bought a Sunn coliseum 300 head back in jan. '04. The guy told me when I bought it that it could use a "tune-up". After a couple of weeks the volume started to cut out intermittently. So I took it to "the Amp Doctor" here in Riverside, Ca. And asked that he let me know if it was worth fixing. I am relatively unfamiliar with the amp. Anyway he says "yeah no problem." A week later the tech tells me it's ready. When I get there, I pay, and then go in the back to check it out. The tech turns it on and nothing. So now it's been almost 6 months and they are still jerking me around. I finally had to threaten to sue him and he agreed to give me a full refund and return my amp (he wanted to keep the head in exchange for the $30.00 bench charge.). So I should be able to pick up the head this week and I'll have to wait for the refund in the mail.
Meanwhile, I would still like to find out if I can save this amp. So if anyone out there knows where I can find a qualified Sunn tech I would appreciate it.