Tube preamp for Pass Labs x150.5 Amp


I currently have a AES AE-3 DJH Preamplifier linking together my Metrum Hex DAC and Pass Labs x150.5 Amp. The Pass is such a neutral/warm amp, that the AES tube preamp is making the total sound too warm in my opinion. I'm thinking of replacing the preamp with something not as warm, but would still like to stay with a tube pre. What would you recammend as a tube pre that could still have that tube sound, but not as warm? I'd like to keep it under 2K used or new, and am considering the Red wine isabella. thoughts?
linaeum66
Keep an eye out for a used VAC Standard preamp. Should be just what you are looking for in that price range.
Try ModWright preamps - they are certainly not warm and stereotypically tubey. Dodd preamps also. Both these manufacturers use 6H30s, which might represent the sound you're after.

Whatever you choose, using balanced outputs has always worked best IME with both the X150.5 and XA30.5.