Can I use a tube preamp w/ a Krell 400mx amp?

I have a First Sound Presence Audio tube preamp. Is it true that I must install Capacitors inside the Krell amp to protect it from DC current before I can hook them up together? Thank you.
Call Krell. They will be most helpful.
You can, but must first make internal adjustments. As Jjmali said, call Krell.

The DC blocking caps are already installed in the Krell amps. The jumpers near the input connectors have to be removed in order for the caps to be in use. It's take only a few minutes to do it yourself and it's very easy.