Center Speaker Noise

  • Thread starter squire.10@osu.e
  • Start date
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squire.10@osu.e

Audioholic Intern
Hello all, this is my first post here. I hope it doesn't annoy anyone if I post this question in multiple topics--I'm not really sure where it fits. Anyhow, I'm having a problem with the center speaker in my new home theater setup. I've only recently acquired this home theater, and only got the 5-channel audio hooked up today. I purchased every bit of this system on eBay (except for my composite audio and digital coax cables which I purchased from Blue Jeans Cable), and therein may lie the problem. Here's a quick list of my equipment:

NHT SuperOne's (L, R, LS, RS), NHT SuperCenter--all bought used on eBay
Onkyo TX-SR503--purchased on eBay--is a factory refurbished unit
Panasonic DVD-S27 DVD Player--purchased new a while ago
Monster Power HTS-3500MKII Power Center
Blue Jeans Cable Composite Video Cable (2x, DVD-receiver, receiver-TV)
Blue Jeans Cable Digital Coax Audio Cable
Front L&R's--Kimber Kable 4PR
Center--AudioQuest Type4
Rears--DIY 10AWG silver plated cable that I purchased on eBay
TV: 19" Samsung POS that will be replaced soon--hopefully

As you can see, I really have an eBay hodgepodge of cables and such right now, but I plan to resell most of it and go with Blue Jeans Cable speaker cables. In any case, here's my problem: everything works beautifully except for the center channel. That speaker has a fair amount of audio "snow" and crackling. I kind of assumed that this was due to some sort of EM interference, but I really don't know. Fiddling around with the various power cords seemed to help a little bit, but I sure can't come close to eliminating the problem. I tried switching the output from the SuperCenter to one of the SuperOne's, thus eliminating the speaker itself as the problem. For that matter I've also eliminated the AQ Type4 as the culprit by switching out the cables. At this point I believe the problem is either some sort of EM interference that I can't isolate or eliminate, a sucky center channel amp or connection inside the receiver, or EMI from the television--though this shouldn't be a problem since the speakers are all magnetically shielded, and I still had the problem when I switched output for the center channel to a speaker on the other side of the room.

Also, the receiver clicks every few minutes. This is the same sort of click that you would hear when you turn the unit on. This happens every 5-10 minutes, and is pretty irritating if I'm listening to a soft passage in music or soft movie dialogue. Is this normal? Any ideas on what could be causing this?

Sorry for being so long-winded, but I wanted to give those with more knowledge than me as much info to go on as possible. If anyone has suggestions or solutions I would be very grateful. Thank you!!
 
Last edited:
J

Johnd

Audioholic Samurai
squire.10@osu.e said:
Hello all, this is my first post here. I hope it doesn't annoy anyone if I post this question in multiple topics--I'm not really sure where it fits. Anyhow, I'm having a problem with the center speaker in my new home theater setup. I've only recently acquired this home theater, and only got the 5-channel audio hooked up today. I purchased every bit of this system on eBay (except for my composite audio and digital coax cables which I purchased from Blue Jeans Cable), and therein may lie the problem. Here's a quick list of my equipment:

NHT SuperOne's (L, R, LS, RS), NHT SuperCenter--all bought used on eBay
Onkyo TX-SR503--purchased on eBay--is a factory refurbished unit
Panasonic DVD-S27 DVD Player--purchased new a while ago
Monster Power HTS-3500MKII Power Center
Blue Jeans Cable Composite Video Cable (2x, DVD-receiver, receiver-TV)
Blue Jeans Cable Digital Coax Audio Cable
Front L&R's--Kimber Kable 4PR
Center--AudioQuest Type4
Rears--DIY 10AWG silver plated cable that I purchased on eBay
TV: 19" Samsung POS that will be replaced soon--hopefully

As you can see, I really have an eBay hodgepodge of cables and such right now, but I plan to resell most of it and go with Blue Jeans Cable speaker cables. In any case, here's my problem: everything works beautifully except for the center channel. That speaker has a fair amount of audio "snow" and crackling. I kind of assumed that this was due to some sort of EM interference, but I really don't know. Fiddling around with the various power cords seemed to help a little bit, but I sure can't come close to eliminating the problem. I tried switching the output from the SuperCenter to one of the SuperOne's, thus eliminating the speaker itself as the problem. For that matter I've also eliminated the AQ Type4 as the culprit by switching out the cables. At this point I believe the problem is either some sort of EM interference that I can't isolate or eliminate, a sucky center channel amp or connection inside the receiver, or EMI from the television--though this shouldn't be a problem since the speakers are all magnetically shielded, and I still had the problem when I switched output for the center channel to a speaker on the other side of the room.

Also, the receiver clicks every few minutes. This is the same sort of click that you would hear when you turn the unit on. This happens every 5-10 minutes, and is pretty irritating if I'm listening to a soft passage in music or soft movie dialogue. Is this normal? Any ideas on what could be causing this?

Sorry for being so long-winded, but I wanted to give those with more knowledge than me as much info to go on as possible. If anyone has suggestions or solutions I would be very grateful. Thank you!!
squire: Hello & welcome. It seems that you have answered you own question:

"I still had the problem when I switched output for the center channel to a speaker on the other side of the room." & "thus eliminating the speaker itself as the problem."

If you approach the problem logically then, all that remains is:
1) the wiring, the connections, or EMI on the wiring, all of which are simple to ascertain and cure; and,
2) the receiver, with either it's power supply or connections, which is also simple to ascertain (by taking a known good speaker and see if you get the intereference with a differently routed wire).

You are on the right track, just keep "doing what you're doing" by trial and error and processes of elimination. Without some elaborate testing equipment and years of knowledge, the former is your most viable option, and it should not take too long to locate the problem. Good luck.
 
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