Conrad Johnson 17LS2 tube problems with Krell amp?

No, I don't believe the CJ's have any DC leakage present at the output, however Oldpet's advice is very astute! Most any well designed vacuum tubed preamp should not have any dc present if the power supply is properly designed.That said: most any tubed preamp "can and will" develop dc leakage if one or more of the electrolitics in the power supply decide to fail. It is imperative to have it bench tested to ascertain if their is any DC voltage present on the output regardless if your using a krell or any other SS amp, older units in paricular.

Thank you all for your informative responses. A lot to think about!

If you purchase the CJ preamp, remember that it inverts phase so you will have to reverse your speaker wire leads.

I have the KCT CAST connected to a 400cx. Before I switched to a Krell based system I had Bryston BP25 running into 7BST monoblocks. At that time I was looking for something with a bit more air and dynamic contrast so I suditioned a cj 17 pre with the 7BSTs and found it to be sweeter but as my wife said, lacking in oomph. So I audioned the KCT with the Bryston amps via balanaced lines and the result was much improved over the BP25 pre. At that point I realized that the KCT was optimized with the CAST into one of Krell's big amp, so decided to go the rest of the way. This was a couple of years ago and I have no desire to change out this combination. It has everything I could want, smoothness, dynanic contrast, extension top and bottom, soundstage that is dictated by the recording. In fact nothing artificial that I can identify. KCT-CAST-400cx, a keeper for life for life.