Silver 9t

I have a question because one of the mono amp has been sounding noisy with
low frequencies.
Is there any place that they could check up for me?
I'll ship by UPS or Fedex from Tokyo, Japan.
I' ll appreciate if somebody could give me an advise.
Thank you,
Satoshi

I believe fellow forum member Rolland services these. Anyone know for sure?

What type of noise are you hearing? Crackling?

satoshi, did you ever get this amp serviced?