Hello. A few months ago I bought a (new) Hartke HA5500. It was/is a good upgrade from my previous amp, but on 3 occasions it has cut out while I'm playing, and would come back on after being shut off for 30-40 seconds. I don't believe I run the amp hard enough to cause overheating. My master vol is never above 4, and the preamps are never above 5. I thought the compression circuit could be the cause, but it has cut out with the compression disabled, too. I didn't see much negative about this amp before buying it. Hartke's warranty service dept told me turnaround could take 6 weeks. I'm not impressed. Have any of you had a similar experience with this model? Thanks.