I think because the amp was still under warranty that they were accommadating. I have a KPS 20i/l that was not covered and they had it for over a month and when I got it back it still had the same problem. It was a mechanical intermittency. I too live about 25 miles from them and dropped it off and picked it up when it was ready. When I told them it still had the problem they said it could take another month from the time I dropped it off. Minimum service cost out of warranty is $100.
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