Repair of Cayin HA-2 tube headphone amp


I have a Cayin HA-2 headphone amp which worked for several months, until the audio sound became almost minimal. You can still hear music, but just barely. This may be a problem with the volume control. Does anybody know a reputable repair company with experience to handle this kind of problem?

Thanks.
hayw

Showing 2 responses by hayw

Thanks for all your responses.

Steve may be able to fit my repair in his schedule but maybe not. If for some reason, he is not available, any other ideas who has the expertise to do the repair?

As to the question about tubes, it is not a tube issue, as I tried more than one pair without any improvement.
Steve the Cayin USA distributor is too busy.

Does anybody else have any other suggestions for repair?

Thx.