I was having some problems with my boat stereo:
(1) one speaker was out
(2) radio reception not good and
(3) sound wasn't very clear
I searched these forums and found the recommendation for Nick Wilmerding at NW Marine Industries, and I couldn't be happier (it was in the old thread about someone needing help installing a Garmin)
Anyway, he came to my home in Wolfeboro on Lake Winnipesaukee, and fixed it all -- added an amplifier, strung the antenna to improve reception and replaced the speaker. Great service and very friendly -- highly recommend.
Just figured I'd share it again, as the service was outstanding.
https://nwmarineindustries.com/
207-266-1888