Amp for Usher BE-20 ?


Hi all,
Usher Be-20 owner out there, what amp you use to drive these beast ?
I have these speakers for couple days now - these have Diamond DMD tweeter. Still listening with Krell KSA-50S
Amps at hand including Atma-Sphere MA-1 and Cary 805C.
Pre-amp is Cary SLP-05
My listening habit is not too loud, and this Krell 50wpc is ok (only first light bias lid). But somehow I hear the low freq quite missing
I will rotate amps to test it out - Not sure if I need something with 200wpc, SS or tube ?
The DMD tweeter is somehow bright to my taste (got use to softdome tweeter, need time to adjust my hearing :)
Do you think tube amp will help smooth out the HF? I might try Cardas Ref cable to soothe the DMD ?
TIA
128x128thuan98
Thanks to all,
After 2 months, after trying another Cary CAD120S, and then a pair of Bel Canto Ref500M. Now I end up with a pair of Usher R1.5 in bridged mode.
Things star getting better and better as the amps going thru break-in period
Best
Thuan
Update:
I couldn't break away with tube sound :)
Currently rotate an old model of Atma MA1 and CAD805C to take care upper freq - An Usher R1.5 stereo to drive 4x 11" woofers
Good matching result, as SS amp rate 150wpc while MA1 has 100wpc
Best
Thuan
TIA- Slightly off topic but I am considering buying the BE-20s for my 16*15 room. Do you think that is a big enough size?