Sonni,

If your (pre) amp has an input impedance of 50k ohm (standardish), then Clarity Caps at 1, 1.5 or 1.6 uF are fine. The 1.6uF fit in the case nicely as well. You can get them mail order if you can not find a local supplier. Other links on this thread will direct you to a calculator to get a good idea of what you might need if your amp has a vastly different input impedance.

Cheers Andy