Sounds like a job for a variac, a line splitter, and an "amp clamp".
New B&K Amp Blows Circuit
The dealer just delivered a new B&K 200w/5 channel amp to my house. The first one blew the circuit breaker on the line several times and then blew its own fuse. The factor sent a new one but insisted I install a new dedicated 20amp line. Even with a dedicated line, the new amp blows the 20a breaker on power up. Has anybody heard of this?