Sorry, not much about these amps. You will find tons of information on the web.

  Thousands of CSV13s and CSV60s have been sold ... and thousands of CSV60s have blown up. They get extremely hot. Where did they leave their philosophy that the design has to follow the function?

  Anyway, both models sound bad. Yes: BAD. They have a permanent "loudness" function which leads to a "ultra-UN-linear" frequency response. The preamp section (mounted on printed circuit boards) is (maybe) the worst I know.

  The ouptput tubes (EL84 in the CSV13) use fixed bias and (thank god!) are not mounted on the PCB. PL504 output tubes in the CSV60? Oh my god. These are TV tubes.

  Be glad if you own the smaller CSV13 and use the power amp section only.

CSV13 front view

CSV13 schematic