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Right Channel Cuts Out intermittently - help!

Hi all,
The right channel in my system cuts out intermittently, no matter what source I’m using. I’ll be listening to whatever, then suddenly I hear a static windy sound from the right channel, and then it cuts out. Then, it comes back, but not for long.
I hooked up a different speaker to that channel and the problem persisted. So, it’s not the speaker. And, as I already stated, it’s not the source components either.
I can’t afford expensive cables - I’m using heavy gauge speaker wire. There are no faults that I can detect in the wire.
Currently, I’m using a HK 4390 Receiver as a preamp/control unit, with a parasound a21 amp. I switched the ends of pre out cable, but the problem remained in the right channel. I also swapped it out with a new cable, which made no difference. The a21 is only a year old, and it is my understanding their build quality is superlative. This problem only started a couple days ago, and I’ve owned the a21 for about a month. It seems unlikely that it is the culprit.
I’m thinking it may be the pre out on the HK.
However, here’s the strangest bit: I disconnected the pre out cable from only the right channel on the a21. With no input from the HK, the static returned again in the right speaker for a brief moment. When I reconnected it, nothing changed. The channel still gets bouts of static, then cuts out.
This is driving me nuts. Could be a power cord or grounding issue? Any help would be greatly appreciated.

audiocronic
erik_squires
16,123 posts
 
Parasound makes great gear, but it sounds like you have a bad one. I'd have it checked out. 

Best,

E
erik_squires
16,123 posts
 
Oh, one more thing to check. 

You might have bad cables or a bad speaker. Check to see if there's any chance your speaker cables have shorted, with a little bare strand of copper. 

Try swapping amp channels. If the problem sttays with the same speaker, it is not your amp.

Best,

E

jea48
4,449 posts
 
Try switching the left and right interconnect, (IC), RCA plugs at the amp’s input jacks only. If the problem moves from the right speaker to the left speaker then it's not the amp.


audiocronic OP
3 posts
 
Update: 
Thanks for the advice guys.  I switched the RCA cables at the input jacks, and tried a new cable. Still, only the right channel cuts out.  
I also hooked up a different pair of speakers and the problem remained, so the speakers are fine.  

But, something is definitely wrong with the HK receiver.  I disconnected the a21 completely, and hooked the speakers back up to my receiver.  No sound at all.  Just muffled noises coming from the sub.  
Im just not sure what happened to it.  We get a lot of lightning in Florida, but everything is plugged into good quality power strips. The  HK is only four years old and has been well cared for.  Guess the bright side is I may finally have an excuse to upgrade to something better.  
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