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 1 response by markpao

Hayw,
Have you checked the tubes? If you don't have spares I would first get some and swap them out before sending the amp in for repairs.