hissing sound coming from behind woofer on one side AR11
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From: Arfa Daily on 29 Jul 2010 12:35 "Amanda Ripanykhazov" <dmanzaluni(a)googlemail.com> wrote in message news:7b33e37c-d03a-4938-aa3a-761ada39d91e(a)5g2000yqz.googlegroups.com... > On Jul 26, 4:11 am, "Arfa Daily" <arfa.da...(a)ntlworld.com> wrote: >> "Amanda Ripanykhazov" <dmanzal...(a)googlemail.com> wrote in message >> >> news:8f36b444-2b05-4f98-85e1-d79583ce9c63(a)g19g2000yqc.googlegroups.com... >> >> >> >> >> >> > On Jul 24, 7:21 am, bz <WQAHBGMXS...(a)spammotel.com> wrote: >> >> Amanda Ripanykhazov wrote: >> >> > Anyone know what this means? This hissing sound isnt constant, it is >> >> > irregular: It isnt related to the music or any movement of the cone >> >> > or any signal put through it, though it doesnt happen when no sound >> >> > is >> >> > put through the speaker. >> >> >> > Frankly it sounds more mechancial than electronic (as if there is >> >> > something behind there!) but as I say, it isnt related to whatever >> >> > is >> >> > coming through the speaker though it does increase and decrease with >> >> > adjustment of the volume control. Andit is louder than most signals >> >> > put through the woofer itself?? >> >> >> > Is it indicative of some pot in the crossover needing cleaning or is >> >> > there something else going on please? (I have seen reference to >> >> > people >> >> > improving the sound of AR11s by bypassing the tone controls in the >> >> > speaker completely). This speaker is quite elderly and I would >> >> > imagine that if it does use mechanical pots, they must be fairly >> >> > dirty >> >> > by now >> >> >> I know it is a silly question, but are you SURE that the hiss isn't >> >> coming out of your amplifier? >> >> (have you put a scope on the speaker lines or substituted either >> >> speaker >> >> or amp?) >> >> >> From your description, it isn't clear to me that you have eliminated >> >> the >> >> 'more obvious' possibility that your amplifier is putting out white >> >> noise, perhaps intermittently varying in amplitude.- Hide quoted >> >> text - >> >> >> - Show quoted text - >> >> > Yeah, switching one speaker pretty much solved that one. >> >> What, solved it as in proved that the amplifier *was* the cause, or >> solved >> it as in it wasn't ? >> >> Arfa- Hide quoted text - >> >> - Show quoted text - > > When I took out the speaker and put in another one, the hissing sound > stopped? When I put the speaker in again, the hissing sound started > again I don't suppose that you are just comparing apples and oranges here, are you ? All amplifiers hiss to some degree - generally, although not always, semiconductor ones more so than tube ones. It's not unusual for one channel to be a little noisier than the other, so you might hear it more on one side than the other. If you swap a different speaker onto the hissy channel, the one that you are swapping in, might not have as good a frequency response as the one you are taking off, so you might not hear the hiss, and think that you've cured a problem that's not really there in the first place. I guess you could also have a defective tweeter or crossover in the speaker that you *think* is good, because it doesn't hiss, when in fact it is actually bad, because it's not managing to reproduce the hiss that is a characteristic of the amp, whereas the other one that you think is bad *is* reproducing it. If you see what I mean ... Can you hear hiss in headphones plugged into it ? If so, is it equal between channels. Does it change depending on what input you have selected on the amp ? Have you tried swapping the speakers that are always connected to the system, between channels, rather than swapping in different speakers of possibly unknown condition and specification. One thing at a time, is the way forward with this sort of 'problem' Arfa
From: GregS on 29 Jul 2010 12:43 In article <7b33e37c-d03a-4938-aa3a-761ada39d91e(a)5g2000yqz.googlegroups.com>, Amanda Ripanykhazov <dmanzaluni(a)googlemail.com> wrote: >On Jul 26, 4:11=A0am, "Arfa Daily" <arfa.da...(a)ntlworld.com> wrote: >> "Amanda Ripanykhazov" <dmanzal...(a)googlemail.com> wrote in message >> >> news:8f36b444-2b05-4f98-85e1-d79583ce9c63(a)g19g2000yqc.googlegroups.com... >> >> >> >> >> >> > On Jul 24, 7:21 am, bz <WQAHBGMXS...(a)spammotel.com> wrote: >> >> Amanda Ripanykhazov wrote: >> >> > Anyone know what this means? This hissing sound isnt constant, it is >> >> > irregular: =A0It isnt related to the music or any movement of the co= >ne >> >> > or any signal put through it, though it doesnt happen when no sound = >is >> >> > put through the speaker. >> >> >> > Frankly it sounds more mechancial than electronic (as if there is >> >> > something behind there!) but as I say, it isnt related to whatever i= >s >> >> > coming through the speaker though it does increase and decrease with >> >> > adjustment of the volume control. =A0Andit is louder than most signa= >ls >> >> > put through the woofer itself?? >> >> >> > Is it indicative of some pot in the crossover needing cleaning or is >> >> > there something else going on please? (I have seen reference to peop= >le >> >> > improving the sound of AR11s by bypassing the tone controls in the >> >> > speaker completely). =A0This speaker is quite elderly and I would >> >> > imagine that if it does use mechanical pots, they must be fairly dir= >ty >> >> > by now >> >> >> I know it is a silly question, but are you SURE that the hiss isn't >> >> coming out of your amplifier? >> >> (have you put a scope on the speaker lines or substituted either speak= >er >> >> or amp?) >> >> >> =A0From your description, it isn't clear to me that you have eliminate= >d the >> >> 'more obvious' possibility that your amplifier is putting out white >> >> noise, perhaps intermittently varying in amplitude.- Hide quoted text = >- >> >> >> - Show quoted text - >> >> > Yeah, switching one speaker pretty much solved that one. >> >> What, solved it as in proved that the amplifier *was* the cause, or solve= >d >> it as in it wasn't ? >> >> Arfa- Hide quoted text - >> >> - Show quoted text - > >When I took out the speaker and put in another one, the hissing sound >stopped? When I put the speaker in again, the hissing sound started >again I don't know if my question was ever answered. Where is the hissing comming from ? Behind speakers means behind the box. If you can't tell from listening, use a piece of tubing to get location. You can get it down to less than an inch. greg
From: Amanda Ripanykhazov on 29 Jul 2010 22:39 On Jul 29, 12:43 pm, zekfr...(a)zekfrivolous.com (GregS) wrote: > In article <7b33e37c-d03a-4938-aa3a-761ada39d...(a)5g2000yqz.googlegroups.com>, Amanda Ripanykhazov <dmanzal...(a)googlemail.com> wrote: > > > > > > >On Jul 26, 4:11=A0am, "Arfa Daily" <arfa.da...(a)ntlworld.com> wrote: > >> "Amanda Ripanykhazov" <dmanzal...(a)googlemail.com> wrote in message > > >>news:8f36b444-2b05-4f98-85e1-d79583ce9c63(a)g19g2000yqc.googlegroups.com.... > > >> > On Jul 24, 7:21 am, bz <WQAHBGMXS...(a)spammotel.com> wrote: > >> >> Amanda Ripanykhazov wrote: > >> >> > Anyone know what this means? This hissing sound isnt constant, it is > >> >> > irregular: =A0It isnt related to the music or any movement of the co= > >ne > >> >> > or any signal put through it, though it doesnt happen when no sound = > >is > >> >> > put through the speaker. > > >> >> > Frankly it sounds more mechancial than electronic (as if there is > >> >> > something behind there!) but as I say, it isnt related to whatever i= > >s > >> >> > coming through the speaker though it does increase and decrease with > >> >> > adjustment of the volume control. =A0Andit is louder than most signa= > >ls > >> >> > put through the woofer itself?? > > >> >> > Is it indicative of some pot in the crossover needing cleaning or is > >> >> > there something else going on please? (I have seen reference to peop= > >le > >> >> > improving the sound of AR11s by bypassing the tone controls in the > >> >> > speaker completely). =A0This speaker is quite elderly and I would > >> >> > imagine that if it does use mechanical pots, they must be fairly dir= > >ty > >> >> > by now > > >> >> I know it is a silly question, but are you SURE that the hiss isn't > >> >> coming out of your amplifier? > >> >> (have you put a scope on the speaker lines or substituted either speak= > >er > >> >> or amp?) > > >> >> =A0From your description, it isn't clear to me that you have eliminate= > >d the > >> >> 'more obvious' possibility that your amplifier is putting out white > >> >> noise, perhaps intermittently varying in amplitude.- Hide quoted text = > >- > > >> >> - Show quoted text - > > >> > Yeah, switching one speaker pretty much solved that one. > > >> What, solved it as in proved that the amplifier *was* the cause, or solve= > >d > >> it as in it wasn't ? > > >> Arfa- Hide quoted text - > > >> - Show quoted text - > > >When I took out the speaker and put in another one, the hissing sound > >stopped? When I put the speaker in again, the hissing sound started > >again > > I don't know if my question was ever answered. Where is the hissing > comming from ? Behind speakers means behind the box. > > If you can't tell from listening, use a piece of tubing to get location. > You can get it down to less than an inch. > > greg- Hide quoted text - > > - Show quoted text - I thought I made this point in the second posting by saying what I did to try to trace it by pushing in the woofer (you cant push in a tweeter that easily), the sound is coming from behind the woofer.
From: Arfa Daily on 30 Jul 2010 04:05 "Amanda Ripanykhazov" <dmanzaluni(a)googlemail.com> wrote in message news:c1be9778-423f-4f2f-8a20-49b444da7375(a)j9g2000yqn.googlegroups.com... > On Jul 29, 12:43 pm, zekfr...(a)zekfrivolous.com (GregS) wrote: >> In article >> <7b33e37c-d03a-4938-aa3a-761ada39d...(a)5g2000yqz.googlegroups.com>, Amanda >> Ripanykhazov <dmanzal...(a)googlemail.com> wrote: >> >> >> >> >> >> >On Jul 26, 4:11=A0am, "Arfa Daily" <arfa.da...(a)ntlworld.com> wrote: >> >> "Amanda Ripanykhazov" <dmanzal...(a)googlemail.com> wrote in message >> >> >>news:8f36b444-2b05-4f98-85e1-d79583ce9c63(a)g19g2000yqc.googlegroups.com... >> >> >> > On Jul 24, 7:21 am, bz <WQAHBGMXS...(a)spammotel.com> wrote: >> >> >> Amanda Ripanykhazov wrote: >> >> >> > Anyone know what this means? This hissing sound isnt constant, it >> >> >> > is >> >> >> > irregular: =A0It isnt related to the music or any movement of the >> >> >> > co= >> >ne >> >> >> > or any signal put through it, though it doesnt happen when no >> >> >> > sound = >> >is >> >> >> > put through the speaker. >> >> >> >> > Frankly it sounds more mechancial than electronic (as if there is >> >> >> > something behind there!) but as I say, it isnt related to >> >> >> > whatever i= >> >s >> >> >> > coming through the speaker though it does increase and decrease >> >> >> > with >> >> >> > adjustment of the volume control. =A0Andit is louder than most >> >> >> > signa= >> >ls >> >> >> > put through the woofer itself?? >> >> >> >> > Is it indicative of some pot in the crossover needing cleaning or >> >> >> > is >> >> >> > there something else going on please? (I have seen reference to >> >> >> > peop= >> >le >> >> >> > improving the sound of AR11s by bypassing the tone controls in >> >> >> > the >> >> >> > speaker completely). =A0This speaker is quite elderly and I would >> >> >> > imagine that if it does use mechanical pots, they must be fairly >> >> >> > dir= >> >ty >> >> >> > by now >> >> >> >> I know it is a silly question, but are you SURE that the hiss isn't >> >> >> coming out of your amplifier? >> >> >> (have you put a scope on the speaker lines or substituted either >> >> >> speak= >> >er >> >> >> or amp?) >> >> >> >> =A0From your description, it isn't clear to me that you have >> >> >> eliminate= >> >d the >> >> >> 'more obvious' possibility that your amplifier is putting out white >> >> >> noise, perhaps intermittently varying in amplitude.- Hide quoted >> >> >> text = >> >- >> >> >> >> - Show quoted text - >> >> >> > Yeah, switching one speaker pretty much solved that one. >> >> >> What, solved it as in proved that the amplifier *was* the cause, or >> >> solve= >> >d >> >> it as in it wasn't ? >> >> >> Arfa- Hide quoted text - >> >> >> - Show quoted text - >> >> >When I took out the speaker and put in another one, the hissing sound >> >stopped? When I put the speaker in again, the hissing sound started >> >again >> >> I don't know if my question was ever answered. Where is the hissing >> comming from ? Behind speakers means behind the box. >> >> If you can't tell from listening, use a piece of tubing to get location. >> You can get it down to less than an inch. >> >> greg- Hide quoted text - >> >> - Show quoted text - > > I thought I made this point in the second posting by saying what I did > to try to trace it by pushing in the woofer (you cant push in a > tweeter that easily), the sound is coming from behind the woofer. I'm thinking now that this is a windup. Looking at the the account that this has come from. dmanzaluni ? Yes, I think that's maybe true ... Arfa
From: Meat Plow on 30 Jul 2010 10:18
On Fri, 30 Jul 2010 09:05:54 +0100, Arfa Daily wrote: >> I thought I made this point in the second posting by saying what I did >> to try to trace it by pushing in the woofer (you cant push in a tweeter >> that easily), the sound is coming from behind the woofer. > > I'm thinking now that this is a windup. Looking at the the account that > this has come from. > > dmanzaluni ? > > Yes, I think that's maybe true ... > > Arfa My reply to the original post was something like "check to see if there is a snake behind the speaker." |