I emailed 3 locations. Germany was responding told to email sales usa, no response i called told to email parts usa.
This the email. my question about parts was never answered till i bitched on this board.
Brian,
All repair shops mark up prices. Power Amps are not cheap.
If you want a second opinion, you can take the unit to another repair technician as it is out of warranty.
Rosen Sound has repaired our products before.