Speaker Hiss with Krell Amp

Do you hear the hiss with only the Krell amp in the chain? If not the cables it could be a pre or source. To me if the hiss is common in an amp of that caliber I would pass on it especially if a super low noise floor is what you're after. With either an Octave V70se/V100 I had absolutely no noise unlike my Bryston (low hum). Now I have an Aavik U300 and still no noise at all.
Just my opinion and best of luck.

The problem of hiss is NOT your krell amp,  but rather your front end,  I  had the same issue once with an ayon cd2s player,  none before or after every heard a hiss from my krell 700cx,  and I always run directly to amplification. 

audiolabyrinth, 

I have gone through the whole excercise to isolate the 'hiss' last year.  I had the same experience when I owned Krell Showcase series, and now Evolution series. 

Going by the test sequence, with everything else being off and disconnected I started with powering up amp first, heard faint hiss. Then powered processor, the hiss noise was further enhanced. I reversed the sequence by powering processor and nothing.  Keep in mind, I am hearing this hiss only when I draw my ear close to tweeter.  

My speakers sensitivity is rated at 90dB.

The hiss doesn't bother me cause I don't listen to my music standing next to my speakers :-)

dsper,

Have you tried just running the amp with no input (or shorting plugs)?
With no signal applied, does the volume setting on your preamp change the results?

It might be a grounding issue.

Roger

Hi lalitx, interesting,  mmm, do you have shielded and RFI/EMI  interconnect's such as taralab's cable's? , my interconnect's have an out board station that has it's own ground to  component's or connect to whatever earth ground, I hear no hiss ever.