I bought a Krell FPB 300 to run my tube BAT Vk 30 preamp.@dilly3364 Krell has been for years actively spreading a false rumor that tube preamps put out DC. This flies in the face of 70 years of tube preamps that don't do that... the started with one of their amplifiers that failed and the customer had used a tube preamp. It might be that the preamp was the problem, if so an event that is extremely rare- and just as rare as a solid state preamp making DC.
Does anybody have the instructions on how to engage the capacitors on this Krell amplifier to be able to run a tube preamp like this one.
So don't worry about it; this simply isn't a thing. Ask **any** other solid state amp manufacturer, or look at the many threads on this forum about how tube preamps and solid state amps work nicely together :)