2. amps-preamps
  3. 1374855232

What's causing hiss??

I've got background hiss on a new-to-me tube/ss integrated with a tube pre amp stage. It is constant no matter what volume with no input from source.

Can this be a power problem? Other amps on that circuit with same setup have no hiss.

Tubes getting old?

Defective unit?
tswei99

Showing 2 responses by tswei99

tswei99 OP
17 posts
 
Yes the hiss is the same in both channels and same volume (can hear it from listening position=unacceptable) with any of my 5 inputs selected at volume=0.

I tried an experiment this morning. I sent the tube pre section out to my el cheapo but zero noise t-amp and the hiss went down considerably. T-amp is 15 watts, integrated is 150 watts, speakers are a super efficient 104 db Klipsch LaScala.

Maybe the answer is find a low noise, low gain tube pre amp to pair with my T amp.
tswei99 OP
17 posts
 
Amps/integrateds on audition:

Bel Canto e300id
Marantz pm8004
Outlaw 2150
Vincent 236MK
Trends ta-10

Source: apple lossless=>sonos=>ps audio DAC

Speakers: klipsch lascala early 80s vintage, recently recapped

I:ve been trying all manner of combos using pre section with the variuous amps. So far i like the tonality of the Vincent (tube) but noise is very high.

Marantz is very quiet but a bit laid back. Bel Canto is quiet but metallic/cool sounding. Bel Canto pre is very quiet with any amp, Vincent pre is the opposite.
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