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- Path: sparky!uunet!haven.umd.edu!ames!sun-barr!male.EBay.Sun.COM!exodus.Eng.Sun.COM!crashnburn.Eng.Sun.COM!rmp
- From: rmp@crashnburn.Eng.Sun.COM (Richard Pottorff)
- Newsgroups: rec.audio
- Subject: Re: Speaker Crackling (popping)
- Date: 15 Dec 1992 23:45:05 GMT
- Organization: Sun
- Lines: 67
- Distribution: na
- Message-ID: <lisrg1INN1gb@exodus.Eng.Sun.COM>
- References: <1992Dec12.001455.20188@cs.brown.edu>
- NNTP-Posting-Host: crashnburn
-
- In article <1992Dec12.001455.20188@cs.brown.edu> cs123052@cs.brown.edu (Michael Lee) writes:
-
- I have this problem with the electrical noise in my dorm room.
- (I think). The power lines in the room don't seem to be "clean".
- I have a Nakamichi TA-2A receiver hooked up to Celestion SL-6si
- speakers. When ever I, say, turn on my room light (flourescent), the
- time in which it takes the light to turn fully on causes a popping
- noise out of my speakers (when the receiver is on, that is).
-
- Likewise, I get a big pop when I turn my CD player on as well (which is
- located next to it.) The fridge, Also does this too, whenever the
- condensor kicks in. The CD player is connected to the same power strip,
- but the Fridge isn't.
- The Thing is, my Computer doesn't do this to my speakers, and neither
- does my tape deck (a/d/s/ C4), which is also located next to the receiver.
-
- This happened in someone elses room, so I brought the receiver to be
- serviced. A couple weeks later, it came back to me with a note from
- the technician that he had benchtested the thing for 1 week straight and
- couldn't replicate the symptoms (thank god it was under warrantee).
-
- So, I'm assuming that this popping noise in the speakers is a problem with
- the electrical lines around here. Is there some way that I could fix this?
- Would something like Adcom's ACE-515 help? [not sure abou tthe part #]
-
- And why doesn't the tape deck affect this? could it be magnetically shielded
- inside? Oh, the CD player always kills FM reception when it's turned on...
-
- Any suggestions would be greatly appreciated.
-
- - mike
- cs123052@cs.brown.edu
- michael_lee@brown.edu
-
-
-
- I write:
-
- Yup, the power lines aren't clean. You are getting transient responses
- coupled thru the power lines to your reciever. I'm not surprised the
- fridge causes a pop. I have a Tripplite active power line conditioner.
- It filters the transients, and also boosts the voltage up to a nominal
- value (low power line voltage might be exacerbating your problem). A power
- conditioner might solve that problem.
-
- The CD player wiping out the FM reception is another problem. You need to do
- a little bit of experimentation to see how the CD player is getting coupled
- to your FM set.
-
- First, remove, and replace left and right channel patch cords from the
- the CD player to the stereo one at a time, and see if the symptom changes.
- Next, try hooking the CD power cord to another power strip, such as the
- fridges, and see if that makes a difference. What kind of antenna are
- you using for your FM reception? Is it a wall mounted dipole? If so,
- move the CD player around (while its on) to see if you can change the
- symptoms. Some fixes to this problem might occur to you when you find
- the method of coupling from the CD player to the FM reciever. (Does the
- CD player wipe out your AM reception too?).
-
- Rick
-
-
- --
- Stolen signature:
- GILLETTE'S PRINCIPLE:
- "If you want to make people angry, lie. If you want to make
- them absolutely livid with rage, tell the truth."
-