2. amps-preamps
  3. 164983-118721

Tone control and ceiling fan issues

I need some help to analysis and find solutions or fixed for my preamp Rotel 1590
When tone control bypass is on the preamp is dead quiet  but when tone control bypass is off the amp make some hissing noise and react to my ceiling fan and AC when I turn on the ceiling fan/ or AC KICK IN it makes some loud pop sound it happens only when tone control bypass is off
I have try 4 different amps no luck 
I’m  using dedicated 20amp lines and surgex SA1810 and Panamax 
I have 3 Sony AVRs ZA5000ES series in this house and non of them has that problem 
I use to own Parasound P6 no issues at all 
I try connect the preamp straight to wall or conditioner no luck 
I try different outlet same problem 4 different speakers KLF 30 chorus ii Epic CF4 and Forte ii 
I bought it use so no warranty 
I have try some ground plugs and Ametek Powervar nothing works 
any suggestions or recommendations for fix in Houston Texas area thanks 
128x128lordrootman
erik_squires
15,944 posts
 
It sounds like the tone controls have their own power supply section and it may be bad.  You could have it checked out.
lordrootman's avatar
lordrootman OP
360 posts
 
@mofojo yes I’m running 2 separate dedicated 20 amp line with 10 gauge wires 
yes I pay electrician to install them for me 
I’m only having this issue with Rotel 
my previous preamp Parasound P6 never has that problem it has tone control bypass too
I have Cambridge Azur 851N and Cocktail Audio X45 Pro used them sometimes like a preamp with no  issues 
 I use to own Rotel high end preamp Michi P5 with The same issues when Tone Control  is engaged 
oldhvymec
5,101 posts
 
OK I understand now. You've owned other Rotels. The other one did the same thing when the tone control was engaged.

Well I truly think that is a question for Rotel, don't you OP? I've never dealt with them. Maybe they have an answer, EVEN if it's what you don't want to hear..

Regards
More to discover