O.K.
It's late, I'm tired, and my ears are ringing from my new toys

I have an Adcom 2 channel 300 watt amp. Stereophile Recommended component.

I run it through a Creek Audio OBH12 pre-amp (passive) another Stereophile Recommended component.

My 950/770 hisses ALOT less than those components did.
I'd be hard pressed to even call it a "hiss"...it sounds more like raw power just waiting to be unleashed.
Just got done listening to Joe Satriani Live in San Francisco....at +5 on the master volume control....through Klipsch towers, center, and surrounds.
"It ain't hiss I heard".