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Humming and static noise, Plinius SA 100 MkIII

Hello. I am currently using a pair of Plinius SA 100 MkIII's as mono blocks to power my B&W 802D's. First the amps have a slight hum when on and sometimes they are very quiet. More importantly, when I turn the volume up all the way without a signal from source, there is a very noticable high frequency hiss like radio signal distortation at the speakers. I have tried many things including changing preamps, cables, cords, etc but nothing worked. These amps generate 400 watts as mono so with the volume turned up all the way the noise may not be abnormal.

I would appreciate if any one with similar issue has an answer for me. I love the amps but the noise level is a bit too high. Note: in normal listening volume the noise is very low and not noticable at all only at vey high levels the noise is very noticable. Thank you.
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Showing 2 responses by inpieces

inpieces's avatar
inpieces
199 posts
 
Plinius amps do have a very high background noise. All of them! I had my combo sent back, they lowered the gain. They also told me, if they lower gain at power amps(rca 32/ xlr 38), the sound they strive for, is not possible. No preamp can change this.
I used SA-102 and SA-250mk4. They sound very good, but this is either something you have to live with, or sell and buy another brand. Oh, the transformers hum, is also typical but not constant.
inpieces's avatar
inpieces
199 posts
 
I noticed all suggestions, i am sincerely honest. This is not a problem outside the amp, it is the amp. I had so much argumenst with mty amps, the store even bought one back. It is accoring to email respons with Plinius, same with new amps. They told me, if i could not accept the SA-120 and 250mk4, i would not accept SA-103 and Ref amp. I bought krell after. But i have moved on. Krell is not not close in signum. maybe you should listen to older Classe gear or Macintosh. Your call!
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