I can't comment much on the VAC preamps, as I use a Shindo preamp with my VAC amplifier. I had used VAC's Renaissance preamp (an older top-of-the-line model) in my old system for a little while a long time ago, which system went down below 20 Hz, and noticed no lack of bass, but I can't comment on their current models. I'm surprised by that information to some extent, given the fine engineering and power supplies in VAC's products. I would expect, unless the source you're referring to has measurements, that the VAC is at the worst fine to at least 25-30 Hz, which might cover a lot of the music you listen to unless it uses a synthesizer to go down to 20Hz and below. Rolled off highs don't bother me, I'm too old to hear them and I think the rolled off highs sound more natural and closer to what I hear in live venues anyway. Out of curiosity, what is the source of the rolled off comment? Were there measurements?