Looking for a solid state preamp for Krell fpb 250m monoblocks

I recommend a tube preamp as well, I think if your not careful you could be adding a lot of coolness and edginess to your system. A tube based pre would add much needed warmth and the Modwright is a good choice but I would also check out a Manley Jumbo Shrimp, or a Doge 8 clarity, or Dehavilland Ultraverve 3 or a Audio Research or Conrad Johnson. All well within your budget.

Matt M

Michael,
A friend of my uses the Krell FPB 600 mono blocks to drive his Rockport Altair speakers.  His preamplifier is the Absolare Passion and it is a superb sounding match.  I strongly disagree with those who told you that tubes and Krell don't mix. 4K dollars can get you a very good used tube preamplifier. 
Good luck, 
Charles, 

OK, I called Patrick at Krell and he told me how to render the Krell FPB 250m safe for Tube preamps, and sent me a diagram. 
Never mind! I'm now a convert to tube preamps!
Thanks guys.

Michael,

Do you have the FPB 250M monos or 300 Stereo amp? I couldn't tell because there's conflicting statements in your opening question. I own the FPB 250M monos and am interested in hearing which tube preamp you decide on.

Gary

Sorry, I mentioned 300m which is incorrect. I have 250m monoblocks. I have just this minute completed the task of removing two small black plastic jumpers , which then engages the capacitors into the signal path, and makes the tube preamp safe for operation with the Krell solid state monos.  Patrick at Krell gave me a little diagram and specific instructions for performing the operation.
It takes a lot longer to remove the screws (8 on each mono) and take off the covers then it does to make the adjustment by removing the little plastic jumpers. Then I put back all 16 screws and now I'm good to go! I will soon see how the Transcendent tube preamp performs with the Krell.