"White noise hiss" through speakers.

Be sure to keep interconnects and speaker cables as far away from power cords as possible. This can cause the noise also. My system with my ear to the speakers is dead quiet with the volume at max. With my last preamp, a tubed ARC LS 16, there was some noise caused by the tubes but not enough to bother me as you had to be right next to the speaker with the volume way up. Please make sure your cables are apart as I had a noise problem from that before. Good Luck

It may not be your MF power amp, (although it might be, as higher powered amps can have a bit of low level noise).

I suspect it is the Belles preamp, as it is a vacuum tube preamp. I believe you are hearing what is referred to as "tube rushing". It is normal, and should not be audible during all but the very quietest passages, like blank areas between songs.

Most people get used to it fairly quickly. Give it a chance to fade into the background, before you get too frustrated.

(FWIW, Unfortunately for me, this frustation from the tube rushing noise never went away. I eventually went all solid state to eliminate it. And to get solid state equipment that sounds as good as tubes, means spending a fair amount of money unfortunately!)

Good Luck and hang in there!

This drives me crazy. It is something of which every component has a little. I would switch out the preamp and see if it goes away, otherwise it is the power amp, which I used to own and found very quiet. I once bought an ARC LS 15 pre which is well regarded. It hissed much worse than thhe 150$ Carver that it replaced. It did other things better but I could not get over the hiss. My deale said that thit was prt of the design, to get the detail and imaging it needed a higher noise floor. I returned it. In the cases it usually the pre

Your Creek had a passive pre-amp stage. The gain in your active pre-amp is probably the culpit, and I think this varies from one active pre to another, as suggested above. When I had a Creek passive pre in my system, it was dead quiet by the speaker with the volume turned all the way up. Now, with an active pre, it is a whole different story with the white noise you are experiencing. However, with music playing in my system, even at loud levels, I don't notice it, in part because with the active pre in the system, I never need to turn the volume all the way up.

Arni hit the nail on the head. I just inserted the Creek in the line as a pre (it has "pre outs") and it is dead quiet when used with the MF. I now have to do some A - B comparisons to see if what I gain in sound improvements with the Bells is worth the hiss. The musician in me says I don't want that hiss, I want the "black nothingness" in-between the notes to be BLACK! lol.

Thanks everybody!