I’m not able to upload video/audio files (if allowed) to share with you what I’m hearing from my loudspeakers so I’ve already sent a copy of this post by email to PS Audio team.
Reading a lot of posts on this forum I noticed a little bit of this and a little bit of that but not exactly what is happing to my system, so sorry if it seems a thread already discussed.
I’m an enthusiast fan of @Paul and all HiFi Family at PS Audio, I simply believe in them and their philosophy, following forums and videos on website. In fact I just purchased without any previous listening (a truly act of faith!):
Stellar M1200s Amps
DS DAC Sr
In addiction to 2 P12 powerplants (2 REL T7/I SUB + Dynaudio Evoke 50 Loudspeaker + TT Technics Sl1200G + Phono Preamp Roksan RPP)
Since a few days I’m burning in all and I admit it’s all wonderful, next impressions with all details scheduled in future.
Here we are… also some little noise occurring
I don’t know how to define it: “hum” or “hiss” or “floor or white noise” please let me know, so I generally call it “NOISE”
EXCLUDING SOURCES - GROUND LOOP
1> If I turn Off (no plug into AC and no plug into signal path) all the sources and are On only BHK Preamp and M1200s = noise is present.
Both the two P12 power plants are On and plugged into 2 wall sockets but on the same dedicated line.
EXCLUDING AMP (without any other gear On or connected)
2> if I turn Off BHK Preamp (connected or not to amps) and turn On only M1200s = silence, no noise
3> if I turn On BHK Preamp and volume level is on “0 mute” = silence, no noise
4> if I turn BHK Preamp volume knob from 0 to 1 = noise appears and it still remain here even if volume value goes to 2, 3, 20, 40, 60 etc etc, Noise is the same without increasing or decreasing along the volume changes, no more noise no less noise. Volume changes do not affect noise in any way
EXCLUDING RCA CABLES
5> BHK Preamp is connected to M1200s amps via XLR cables (Invictus Ricable high quality) = noise always present
EXCLUDING TUBES? (maybe)
6> I tried swapping tubes (original stock PSvane) right with left = noise is better mainly with one speaker that before swapping tubes was so much louder than the other one but… unfortunately noise is still present
7> I just purchased a new pair of tubes PSvane 12AU7 S (art series) because here in Europe is the only PSVane 12AU7 model I can find. Let me know if you suggest to put them into the BHK Preamp or is better to keep the stock valves
I clearly hear this noise if I put my ears close to the speaker and far from 1 meter distance. I do not hear it so clear from my listening sweet spot 3 meters far from speakers. Anyhow I do not have as before BLACK DEADLY SILENCE. is it normal? Am I accept this noise as consequence of tubes (first time for me).
Is it annoying? YES!
Can I live with it? Yes, but… if possible to remove it or reduce it is better, so much better.
What can I do?
Each time I change the volume on BHK Preamp I hear a little thin “click” from loudspeaker.
Not the loud big click at 25 or 52, that I know is correct and much more clear to hear.
Just a thin click at every incremental/decdremental value, for example from 4 to 5 and also the reverse from 5 to 4, I hear “click". And if I turn continously the volume knob I hear a lot of continuous clicks, for example from 15 to 23 “click click click very speed one following each other” and the same if on reverse from 23 to 15.
If volume “0 mute” to 1 and reverse 1 to 0, no thumps or big rumors or any other alarm big odd sounds - nothing at all - all is ok and quite silence (only the annoying noise above described in point 1)
As a little boy with the brand new toy, I’m so happy of my new gears and their SQ but if I can solve these 2 issues would make me happier, I would like to exclude without any doubt any faulty or similar problems, and most of all reducing or removing issues above mentioned.