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Help in minimizing hiss

I’m wondering if all hiss can be removed, particularly with highly efficient speakers.
The hiss in my system is audible from about 4-5’ away when it’s silent in the house.

All gear is on a dedicated line I installed with new 12/3 romex to the panel with a 20 amp breaker.
I’m using all quality power cables and XLRs.

Rig:
Oppo 105 - Schitt Freya + - Legacy Wavelet DSP - Pass Labs X260.8 - Legacy Valor (101 dB sens)

Thanks for any input you may have,Scott
simpleman68

Showing 3 responses by lowrider57

lowrider57's avatar
lowrider57
5,418 posts
 
If you suspect noise is coming from the Freya, change to passive mode which will remove any tube hiss.


lowrider57's avatar
lowrider57
5,418 posts
 
 It's hard to be noise-free when using 101 dB sens. speakers. 
Did you try the suggested test of only having your amp powered up, no components?

If your amp is quiet, then your upstream devices might  benefit from power conditioning.

lowrider57's avatar
lowrider57
5,418 posts
 
You should work with a reputable dealer and request low-noise and low microphonic matched tubes. The quality and noise level of a 6SN7 can vary greatly, but the right tube will provide wonderful sonics in a preamp.

I mentioned a power conditioner for your sources since noise from the AC line will also be audible thru your speakers. This is not hiss, but every line connected to the power grid will introduce noise into the system (even a dedicated line). 

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