I have an Ampeg PF-500 that cuts out - I know, don't they all? Anyway, I brought it into an Ampeg authorized service center on December 9th. Yes, you read that right, they've had it for over seven weeks! LOUD have been jerking the service center around this whole time, giving them different tests to try, but only allowing them to use a sine wave generator, not an actual bass. Doing this, they cannot get the amp to fail - hmm, set the parameters of the test to guarantee a pass, then wonder that there is no fail... So, LOUD are continuing to insist that there is no problem with my amp, and that there is no issue with these amps. According to LOUD, nobody has ever had a PF-500 fail! So, please tell your stories here, including how it got resolved. Thanks!