PS Audio BHK lacking..


I bought a used PS Audio BHK preamp to replace my Rotel.  It sounds thin with no depth & bass compared to my Rotel so I let it run for over an hour with no change. I'm new to tubes so I'm looking for ideas. New tubes or what?
128x128fertguy
scothurwitz,We're on the same page. I'm using Tele 12s from 1958 now. Sounds great.
fertguy,

I’m looking at getting the BHK preamp.  Now that you’ve had the new tubes for a while, what are your thoughts on the BHK now?

All the best.

JD