I have a Rogue 66 pre that I'm using with my Pass and so far, so good. Currently I'm using rca cables, and I'm on the hunt for a good tube preamp with balanced connectors. The Pass is absolutely one of my favorite amps so far...this year. I just obtained both in separate purchases recently, both used, and it's definitely the amp that has made the most significant difference for me. I'm keeping my Rogue Cronus Magnum integrated regardless, but the Pass is also a keeper.
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?