PS Audio BHK Pre Amp and Herron VTPH-2A Phono Pre Users


I just purchased a PS Audio BHK pre amp.  I am moving to the BHK because I need to start using XLR cables for long runs to my power amp.  

When using the BHK with the Herron VTPH-2A phono pre, the sound is flat - for want of a better word.  When I use my Herron VTSP-3A(r02) pre amp with the VTPH-2A, the sound is wonderful.  I'm new to tubes.  I think I have an impedance issue.  Anyone else using a Herron phono pre with a BHK pre amp having or had a similar experience.

128x128oldschool1948
I have 6m RCA’s running to my amps in the front, gear on the side.  No noise issue.  This is on multiple amp and preamp combos.
i have some very nice SE IC’s, but before I got these I had installed some way, way cheaper options and none exhibited noise issues.

i would stick with the Herron combo, and at least investigate getting some loaner long IC’s to make sure.
I’m convinced that long RCA interconnects could work. 
The SQ I get with XLR with the BHK/DSD is much better than RCA, so I intended to stick with it.
I have to downsize though.  I have a vintage McIntosh system that I haven’t used in over a year in my rev room. Once our remodeling projects are finished, the McIntosh gear goes up for sale. I will keep the Herron pieces for now anyway.