Tube Amps needing mods. Needing a referral for the work.

I suggest contacting ARC and letting them know you really don't like the sound of their statement amps. Then ask if they know of any techs in your area who would could change their carefully engineered creation. I'm sure you'll hear back.

I want to apologize for my comment, as it was snarky and totally uncalled for (out of character for me). I don't have ARC experience, but I'm sure someone who does will post a comment that is actually helpful (unlike mine). Again, my apologies.

Leave them be! Mods will harm the resale value.

I think if you don't like how they sound they're probably not the right amps for you. Alternatively, ARC stuff is super sensitive to pairing so it could be that your preamp isn't a good match. Either way, rather than mod a fairly expensive unit I'd seek better pairing. Sometimes it takes a few tries to get things right in a system. I tried an ARC preamp and while I know it's a great unit as I've heard it sound great elsewhere, it didn't work for me.