2. amps-preamps
  3. 153922-46

Bazaar buzz

So if I plug my ARC Classic 60 into the wall with the speakers hooked up and turn it on I get no buzz. Please note that no other equipment is plugged in NOR are and interconnects attaches to the amp or any other piece of equipment. 
HOWEVER, if the only thing I do is plug interconnects into the amp - nothing else, I get a buzz/hum.  Mind you the cables are ONLY PLUGGED INO THE AMP. 

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last_lemming
georgehifi's avatar
georgehifi
10,312 posts
 

Get some shorting rca’s plugs (not those stupid rca caps) it’s the only way "you" are going to find out if it needs a tech to look at it. Both channels should be quite when these are in. If not see a tech.

https://www.ebay.com.au/itm/Onkyo-TX-DS989-Stereo-Receiver-Parts-Original-RCA-Shorting-Plug-Noise-Terminator/173848128831?hash=item287a27ed3f:g:x74AAOSwkNFclo7J&frcectupt=true

https://www.ebay.com.au/itm/RCA-Shorting-Plug-for-Vintage-Fender-Pro-Reverb-Amp-No-Need-for-a-Footswitch/174113224229?hash=item2889f4f625:g:5C8AAOSw5VFWMAHP&frcectupt=true
last_lemming OP
631 posts
 
Just an update I just used a standalone transformer with the amp, and all the buzz and hum appears to be gone!  I say “gone”, unless you put your ear right up to the woofer and then you can hear the slightest, slightest hum/buzz. Certainly not audible from the seating position.  If you put your ear to the tweeter or mid range you just hear your normal hiss, with no other artifacts. 
I’m assuming this points to dirty AC, correct?
georgehifi's avatar
georgehifi
10,312 posts
 
🤷‍♂️🤷‍♂️
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