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
I catch a little heck because I’m using a TFM 45 Carver. I bought the amp new in the 80s. About a year ago it was completely updated with new & better everything. Long list. It is dead quiet, runs cool & is rated at 375 WPC. They told me when they rebuilt it it would be tube like. I'd never had tubes so how would I know. I used to have it on a set of Kappa 8s & it was wonderful.
Fertguy

Great choice on the Telefunkens from 1958. Those tubes should sound fantastic. I’ll bet those weren’t cheap. My Telefunkens were date coded from 1962 and they were just amazing. It took that BHK preamp to a whole new level. Let us know what they sound like after you’ve had a chance to listen to them for a month or two, I think you’re in for a real surprise. Enjoy.

Scot
Telefunkens are great on rock  and most jazz .
Often to harsh in treble for  classical .