hissing sound coming from behind woofer on one side AR11
in [Repair]
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From: Meat Plow on 1 Aug 2010 18:11 On Sat, 31 Jul 2010 08:04:14 -0700, Amanda Ripanykhazov wrote: > On Jul 30, 5:41 pm, Meat Plow <mhyw...(a)yahoo.com> wrote: >> On Fri, 30 Jul 2010 14:03:39 -0700, Amanda Ripanykhazov wrote: >> > Thank you for your confidence everyone: If I wanted to wind everyone >> > up, dont you think I would have found a funnier way of doing it than >> > this? >> >> Not if you're just not too funny in the first place. >> >> > If someone can get me a way of posting a wav file to a NG, let me >> > know and I will stick a microphone in front of the speaker and post >> > whatever it records >> >> > Meanwhile I will take the speaker out and report back if/when I have >> > a result >> >> But you've already subbed the speaker and the hiss went away or so I >> thought I had previously read. > > Call me an old cynic and obviously I am not a technical expert but > doesnt simple logic mandate that when you sub a speaker and the sound > goes away, all it means is that (what I thought blindingly obvious from > the symptoms and there being no apparent logical connection between the > source and the hissing, which was why I posted here: Because "The > problem is that you are describing something that doesn't seem to make > any sense, or have any obvious explanation" so I wondered whether anyone > had come across it before) the sound wasnt coming from the source? Or > did I have to add that when i put the speaker back again, the sound came > back? Sorry if you have been labeled a troll. You seem to have enough sense to effect a repair so please do.
From: Meat Plow on 1 Aug 2010 18:14 On Sat, 31 Jul 2010 12:25:38 -0700, nesesu wrote: > On Jul 31, 9:30 am, "William Sommerwerck" <grizzledgee...(a)comcast.net> > wrote: >> Call me an old cynic and obviously I am not a technical expert but >> doesnt simple logic mandate that when you sub a speaker and the sound >> goes away, all it means is that (what I thought blindingly obvious from >> the symptoms and there being no apparent logical connection between the >> source and the hissing, which was why I posted here: Because "The >> problem is that you are describing something that doesn't seem to make >> any sense, or have any obvious explanation" so I wondered whether >> anyone had come across it before) the sound wasnt coming from the >> source? Or did I have to add that when i put the speaker back again, >> the sound came back? >> >> Your speakers are passive devices. They cannot make any sort of sound >> on their own. >> >> If hissing is coming from one of them (but not the other, when driven >> from the same amp), the speaker must be therefore be the source of the >> hiss. But as there is nothing in the speaker that could, by itself, >> create sound, then the speaker must be altering or distorting its input >> to produce the hiss. However, you say that the presence or level of the >> hiss is not related to the program material. >> >> This makes no sense. The logical conclusion is that A: you are grossly >> mis-describing the symptoms, or B: this is a troll. >> >> I think it's B. I really don't have any more time for this >> tsuris/tsimmes. Take your pick. > > There is a slight possibility that there is an issue with the crossover > in this speaker that de-stabilizes the driving amplifier, causing an HF > oscillation in the amp, yet the amp IS stable with the other speaker. > I worked on an Pioneer amp that was marginally stable and would > oscillate depending on the load. The clue it was oscillating was a > 'sizzle' in the speaker and the overload lamp was always lit. Other than > that it appeared to work fine to the owners old ears, although there was > a slightly perceptable clipping distortion on louder passages. A slight > adjustment of the R-C feedback in the amp returned the rock solid > stability and eliminated the perceived 'hiss'. That system had been to > two 'professional' shops; one said there was nothing wrong and the other > said it could not be repaired. > > Neil S. I wouldn't bet on it and I'm not going back through the thread because I don't thread or keep or watch articles but, I thought Amanda said the speaker hissed on its own without an amp powered up.
From: William Sommerwerck on 1 Aug 2010 18:45 > Sorry if you have been labeled a troll. You seem to have > enough sense to effect a repair so please do. If you do effect a repair, please let us know what the problem was. I would be delighted to learn that I was wrong.
From: William Sommerwerck on 1 Aug 2010 18:46 > I wouldn't bet on it and I'm not going back through > the thread because I don't thread or keep or watch > articles but, I thought Amanda said the speaker > hissed on its own without an amp powered up. My memory is that she said it didn't -- the amp had to be on. But there seemed to be no correlation between the program's content or volume. Put a 'scope on the amp's output, if you can.
From: Michael A. Terrell on 2 Aug 2010 09:01
Amanda Ripanykhazov wrote: > > Thank you for your confidence everyone: If I wanted to wind everyone > up, dont you think I would have found a funnier way of doing it than > this? > > If someone can get me a way of posting a wav file to a NG, let me know > and I will stick a microphone in front of the speaker and post > whatever it records > > Meanwhile I will take the speaker out and report back if/when I have a > result 1: Google doesn't allow any attachments. 2: This is not a binaries newsgroup so any message with an attachment won't propagate to most news servers. |