Amplifier repair in the Baltimore/Washington area

I had a fairly close lightning strike about a week and a half ago that left a couple of my various electronics in different states of partial failure.  (Despite the fact that my amp is behind a surge suppressor.)

My home theater amp, a Sherbourn 5/1500A, now makes a couple really loud popping sounds on startup.  Otherwise, it seems to work fine.  I contacted Emotiva (which bought out Sherbourn), and they said that they don't provide repair services for any of their legacy systems.

Can anyone provide recommendations for a good tech in the Baltimore/Washington area to look over the amp?

Thanks in advance,

Michael