The Pass preamp is a very good preamp. If I were to put money on it, I would bet going through the Pass would be much better than using the Benchmark as preamp. I would make the Pass the center of my system and swap other components to maximize sound quality. The Pass is a fine piece of high end audio gear. One I would still be proud to own.
if your ears disagree, I would listen some more. But ultimately your ears are the final judge.
if your ears disagree, I would listen some more. But ultimately your ears are the final judge.