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#1
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Yes its a noise question... sorry
Hi all - I vowed I wouldn't join the masses and post a question to help with
a noise problem - but I've got one, and my reading and attempts so far haven't fixed it so... I recently installed a new amp (Boss Audio), subs (Pioneer 10") and head-unit (Panasonic CQ-DFX572 - I think its an international model and may be called something different in other countries) in my Commodore (for you aussies). Since the install my front speakers (Kenwood 6") have exhibited an audiable buzzz. Its not particularly loud, its only noticable during silent parts of the music. It goes away if I remove the either both the subwoofer RCAs or both the front speaker RCAs from my amp (only subs and fronts are running off the amp). It doesn't change when the car is on or off or with engine rpm. It does change when I adjust the gain to the front speakers on the amp. It doesn't change much when the volume on the head unit is changed. Its on right from when the head unit switches on to when its turned off. As to my install, I've got my speaker wires running up under the roof trim, my amp power wire running in the lower door foot trim and my RCAs running down the center hump. I've checked my ground point, cleaned it back to bright shiny metal, installed a washer to help apply pressure. I'm pretty sure its not the speakers because they were fine before the install and are fine when the subwoofer RCAs are pulled. My only ideas how to fix it now are to completely relocate the gound point. Its currently into body metal on the front of the trunk - for those familiar with commodores its into the seat support metal in the sedan. I could probably move it lower down so it was directly onto frame material but I'm not sure it would help signifcantly - its already on a well integrated piece of steel. Another idea would be to start moving cables around... but where? - everything it as far away as I can see practical. Finally my last option I guess is to check the ground on the head unit - its currently to the factory ground wire - I assumed this would be sufficient. So any ideas people? - is it likely that it could be a problem with the head unit? The head unit has 6 pre-outs - 2 front, 2 rear, 2 subs. I'm using the 2 front and the 2 subs with the rear speakers being driven off the headunit preamp. It it possible it could be the amp? I wouldn't have thought so since it seems capable of making noise free music under some circumstances. Anyway, any help would be greatly appriciated - especially if it would save me the hassle of ripping stuff out again. Any body interested in my install so far can check out http://allen.alphadimensions.net/~aidan/audio.htm best regards Aidan To reply remove the .au and swap the allen and alphadimensions in my address. -- ____________________________________________ BE(Mech) Hons (Mat. Eng.) |
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#2
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Yes its a noise question... sorry
Sounds like your HU is trying to find a better ground through the RCAs. Try
a new HU ground and see what happens. Paul Vina "A. Allen" wrote in message ... Hi all - I vowed I wouldn't join the masses and post a question to help with a noise problem - but I've got one, and my reading and attempts so far haven't fixed it so... I recently installed a new amp (Boss Audio), subs (Pioneer 10") and head-unit (Panasonic CQ-DFX572 - I think its an international model and may be called something different in other countries) in my Commodore (for you aussies). Since the install my front speakers (Kenwood 6") have exhibited an audiable buzzz. Its not particularly loud, its only noticable during silent parts of the music. It goes away if I remove the either both the subwoofer RCAs or both the front speaker RCAs from my amp (only subs and fronts are running off the amp). It doesn't change when the car is on or off or with engine rpm. It does change when I adjust the gain to the front speakers on the amp. It doesn't change much when the volume on the head unit is changed. Its on right from when the head unit switches on to when its turned off. As to my install, I've got my speaker wires running up under the roof trim, my amp power wire running in the lower door foot trim and my RCAs running down the center hump. I've checked my ground point, cleaned it back to bright shiny metal, installed a washer to help apply pressure. I'm pretty sure its not the speakers because they were fine before the install and are fine when the subwoofer RCAs are pulled. My only ideas how to fix it now are to completely relocate the gound point. Its currently into body metal on the front of the trunk - for those familiar with commodores its into the seat support metal in the sedan. I could probably move it lower down so it was directly onto frame material but I'm not sure it would help signifcantly - its already on a well integrated piece of steel. Another idea would be to start moving cables around... but where? - everything it as far away as I can see practical. Finally my last option I guess is to check the ground on the head unit - its currently to the factory ground wire - I assumed this would be sufficient. So any ideas people? - is it likely that it could be a problem with the head unit? The head unit has 6 pre-outs - 2 front, 2 rear, 2 subs. I'm using the 2 front and the 2 subs with the rear speakers being driven off the headunit preamp. It it possible it could be the amp? I wouldn't have thought so since it seems capable of making noise free music under some circumstances. Anyway, any help would be greatly appriciated - especially if it would save me the hassle of ripping stuff out again. Any body interested in my install so far can check out http://allen.alphadimensions.net/~aidan/audio.htm best regards Aidan To reply remove the .au and swap the allen and alphadimensions in my address. -- ____________________________________________ BE(Mech) Hons (Mat. Eng.) |
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#3
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Yes its a noise question... sorry
"Paul Vina" wrote in message
news:O0ZNa.52190$Xm3.13302@sccrnsc02... Sounds like your HU is trying to find a better ground through the RCAs. Try a new HU ground and see what happens. Rightio - that was next on the list anyway, probably won't get around to it until later in the week... I'll let you know how it goes. -Aidan Paul Vina "A. Allen" wrote in message ... Hi all - I vowed I wouldn't join the masses and post a question to help with a noise problem - but I've got one, and my reading and attempts so far haven't fixed it so... I recently installed a new amp (Boss Audio), subs (Pioneer 10") and head-unit (Panasonic CQ-DFX572 - I think its an international model and may be called something different in other countries) in my Commodore (for you aussies). Since the install my front speakers (Kenwood 6") have exhibited an audiable buzzz. Its not particularly loud, its only noticable during silent parts of the music. It goes away if I remove the either both the subwoofer RCAs or both the front speaker RCAs from my amp (only subs and fronts are running off the amp). It doesn't change when the car is on or off or with engine rpm. It does change when I adjust the gain to the front speakers on the amp. It doesn't change much when the volume on the head unit is changed. Its on right from when the head unit switches on to when its turned off. As to my install, I've got my speaker wires running up under the roof trim, my amp power wire running in the lower door foot trim and my RCAs running down the center hump. I've checked my ground point, cleaned it back to bright shiny metal, installed a washer to help apply pressure. I'm pretty sure its not the speakers because they were fine before the install and are fine when the subwoofer RCAs are pulled. My only ideas how to fix it now are to completely relocate the gound point. Its currently into body metal on the front of the trunk - for those familiar with commodores its into the seat support metal in the sedan. I could probably move it lower down so it was directly onto frame material but I'm not sure it would help signifcantly - its already on a well integrated piece of steel. Another idea would be to start moving cables around... but where? - everything it as far away as I can see practical. Finally my last option I guess is to check the ground on the head unit - its currently to the factory ground wire - I assumed this would be sufficient. So any ideas people? - is it likely that it could be a problem with the head unit? The head unit has 6 pre-outs - 2 front, 2 rear, 2 subs. I'm using the 2 front and the 2 subs with the rear speakers being driven off the headunit preamp. It it possible it could be the amp? I wouldn't have thought so since it seems capable of making noise free music under some circumstances. Anyway, any help would be greatly appriciated - especially if it would save me the hassle of ripping stuff out again. Any body interested in my install so far can check out http://allen.alphadimensions.net/~aidan/audio.htm best regards Aidan To reply remove the .au and swap the allen and alphadimensions in my address. -- ____________________________________________ BE(Mech) Hons (Mat. Eng.) |
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#4
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Yes its a noise question... sorry
Try a RadioShack ground loop isolater ($15) between the head unit and the
amp to see if things quiet down. Try to be sure none of the RCA outer shells are touching ground anywhere. Good luck "A. Allen" wrote in message ... Hi all - I vowed I wouldn't join the masses and post a question to help with a noise problem - but I've got one, and my reading and attempts so far haven't fixed it so... I recently installed a new amp (Boss Audio), subs (Pioneer 10") and head-unit (Panasonic CQ-DFX572 - I think its an international model and may be called something different in other countries) in my Commodore (for you aussies). Since the install my front speakers (Kenwood 6") have exhibited an audiable buzzz. Its not particularly loud, its only noticable during silent parts of the music. It goes away if I remove the either both the subwoofer RCAs or both the front speaker RCAs from my amp (only subs and fronts are running off the amp). It doesn't change when the car is on or off or with engine rpm. It does change when I adjust the gain to the front speakers on the amp. It doesn't change much when the volume on the head unit is changed. Its on right from when the head unit switches on to when its turned off. As to my install, I've got my speaker wires running up under the roof trim, my amp power wire running in the lower door foot trim and my RCAs running down the center hump. I've checked my ground point, cleaned it back to bright shiny metal, installed a washer to help apply pressure. I'm pretty sure its not the speakers because they were fine before the install and are fine when the subwoofer RCAs are pulled. My only ideas how to fix it now are to completely relocate the gound point. Its currently into body metal on the front of the trunk - for those familiar with commodores its into the seat support metal in the sedan. I could probably move it lower down so it was directly onto frame material but I'm not sure it would help signifcantly - its already on a well integrated piece of steel. Another idea would be to start moving cables around... but where? - everything it as far away as I can see practical. Finally my last option I guess is to check the ground on the head unit - its currently to the factory ground wire - I assumed this would be sufficient. So any ideas people? - is it likely that it could be a problem with the head unit? The head unit has 6 pre-outs - 2 front, 2 rear, 2 subs. I'm using the 2 front and the 2 subs with the rear speakers being driven off the headunit preamp. It it possible it could be the amp? I wouldn't have thought so since it seems capable of making noise free music under some circumstances. Anyway, any help would be greatly appriciated - especially if it would save me the hassle of ripping stuff out again. Any body interested in my install so far can check out http://allen.alphadimensions.net/~aidan/audio.htm best regards Aidan To reply remove the .au and swap the allen and alphadimensions in my address. -- ____________________________________________ BE(Mech) Hons (Mat. Eng.) |
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#5
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Yes its a noise question... sorry
Try a RadioShack ground loop isolater ($15) between the head unit and the amp to see if things quiet down. We're tryin got help him fix the problem, not put a band-aid on it. Paul Vina Try to be sure none of the RCA outer shells are touching ground anywhere. Good luck "A. Allen" wrote in message ... Hi all - I vowed I wouldn't join the masses and post a question to help with a noise problem - but I've got one, and my reading and attempts so far haven't fixed it so... I recently installed a new amp (Boss Audio), subs (Pioneer 10") and head-unit (Panasonic CQ-DFX572 - I think its an international model and may be called something different in other countries) in my Commodore (for you aussies). Since the install my front speakers (Kenwood 6") have exhibited an audiable buzzz. Its not particularly loud, its only noticable during silent parts of the music. It goes away if I remove the either both the subwoofer RCAs or both the front speaker RCAs from my amp (only subs and fronts are running off the amp). It doesn't change when the car is on or off or with engine rpm. It does change when I adjust the gain to the front speakers on the amp. It doesn't change much when the volume on the head unit is changed. Its on right from when the head unit switches on to when its turned off. As to my install, I've got my speaker wires running up under the roof trim, my amp power wire running in the lower door foot trim and my RCAs running down the center hump. I've checked my ground point, cleaned it back to bright shiny metal, installed a washer to help apply pressure. I'm pretty sure its not the speakers because they were fine before the install and are fine when the subwoofer RCAs are pulled. My only ideas how to fix it now are to completely relocate the gound point. Its currently into body metal on the front of the trunk - for those familiar with commodores its into the seat support metal in the sedan. I could probably move it lower down so it was directly onto frame material but I'm not sure it would help signifcantly - its already on a well integrated piece of steel. Another idea would be to start moving cables around... but where? - everything it as far away as I can see practical. Finally my last option I guess is to check the ground on the head unit - its currently to the factory ground wire - I assumed this would be sufficient. So any ideas people? - is it likely that it could be a problem with the head unit? The head unit has 6 pre-outs - 2 front, 2 rear, 2 subs. I'm using the 2 front and the 2 subs with the rear speakers being driven off the headunit preamp. It it possible it could be the amp? I wouldn't have thought so since it seems capable of making noise free music under some circumstances. Anyway, any help would be greatly appriciated - especially if it would save me the hassle of ripping stuff out again. Any body interested in my install so far can check out http://allen.alphadimensions.net/~aidan/audio.htm best regards Aidan To reply remove the .au and swap the allen and alphadimensions in my address. -- ____________________________________________ BE(Mech) Hons (Mat. Eng.) |
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#6
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Yes its a noise question... sorry
BANDAID????
Since when is eliminating the ground loop on the signal wires a BAND AID? If it works, go with it! Eddie Runner Paul Vina wrote: Try a RadioShack ground loop isolater ($15) between the head unit and the amp to see if things quiet down. We're tryin got help him fix the problem, not put a band-aid on it. Paul Vina |
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#7
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Yes its a noise question... sorry
must admit I'd like to get rid of the noise by 'natural means' first...
worst comes to worst I may try a ground loop isolator but it'll probably a last resort. Thanks for the tip anyway. I must mention that radioshack isn't the most common of brands over here (they are distributed through another retail chain) so I may have trouble even finding one. regards Aidan -- ____________________________________________ BE(Mech) Hons (Mat. Eng.) "news.adelphia.net" wrote in message news  Try a RadioShack ground loop isolater ($15) between the head unit and the amp to see if things quiet down. Try to be sure none of the RCA outer shells are touching ground anywhere. Good luck "A. Allen" wrote in message ... Hi all - I vowed I wouldn't join the masses and post a question to help with a noise problem - but I've got one, and my reading and attempts so far haven't fixed it so... I recently installed a new amp (Boss Audio), subs (Pioneer 10") and head-unit (Panasonic CQ-DFX572 - I think its an international model and may be called something different in other countries) in my Commodore (for you aussies). Since the install my front speakers (Kenwood 6") have exhibited an audiable buzzz. Its not particularly loud, its only noticable during silent parts of the music. It goes away if I remove the either both the subwoofer RCAs or both the front speaker RCAs from my amp (only subs and fronts are running off the amp). It doesn't change when the car is on or off or with engine rpm. It does change when I adjust the gain to the front speakers on the amp. It doesn't change much when the volume on the head unit is changed. Its on right from when the head unit switches on to when its turned off. As to my install, I've got my speaker wires running up under the roof trim, my amp power wire running in the lower door foot trim and my RCAs running down the center hump. I've checked my ground point, cleaned it back to bright shiny metal, installed a washer to help apply pressure. I'm pretty sure its not the speakers because they were fine before the install and are fine when the subwoofer RCAs are pulled. My only ideas how to fix it now are to completely relocate the gound point. Its currently into body metal on the front of the trunk - for those familiar with commodores its into the seat support metal in the sedan. I could probably move it lower down so it was directly onto frame material but I'm not sure it would help signifcantly - its already on a well integrated piece of steel. Another idea would be to start moving cables around... but where? - everything it as far away as I can see practical. Finally my last option I guess is to check the ground on the head unit - its currently to the factory ground wire - I assumed this would be sufficient. So any ideas people? - is it likely that it could be a problem with the head unit? The head unit has 6 pre-outs - 2 front, 2 rear, 2 subs. I'm using the 2 front and the 2 subs with the rear speakers being driven off the headunit preamp. It it possible it could be the amp? I wouldn't have thought so since it seems capable of making noise free music under some circumstances. Anyway, any help would be greatly appriciated - especially if it would save me the hassle of ripping stuff out again. Any body interested in my install so far can check out http://allen.alphadimensions.net/~aidan/audio.htm best regards Aidan To reply remove the .au and swap the allen and alphadimensions in my address. -- ____________________________________________ BE(Mech) Hons (Mat. Eng.) |
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#8
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Yes its a noise question... sorry
This was fixed by replacing the remote turn on lead with a new one
right? I have a noise issue that different grounding schemes have not resolved, and I am about to place a relay in the chain for the remote turn on lead. Paul "A. Allen" wrote in message ... must admit I'd like to get rid of the noise by 'natural means' first... worst comes to worst I may try a ground loop isolator but it'll probably a last resort. Thanks for the tip anyway. I must mention that radioshack isn't the most common of brands over here (they are distributed through another retail chain) so I may have trouble even finding one. regards Aidan -- ____________________________________________ BE(Mech) Hons (Mat. Eng.) "news.adelphia.net" wrote in message news Try a RadioShack ground loop isolater ($15) between the head unit and the amp to see if things quiet down. Try to be sure none of the RCA outer shells are touching ground anywhere. Good luck "A. Allen" wrote in message ... Hi all - I vowed I wouldn't join the masses and post a question to help with a noise problem - but I've got one, and my reading and attempts so far haven't fixed it so... I recently installed a new amp (Boss Audio), subs (Pioneer 10") and head-unit (Panasonic CQ-DFX572 - I think its an international model and may be called something different in other countries) in my Commodore (for you aussies). Since the install my front speakers (Kenwood 6") have exhibited an audiable buzzz. Its not particularly loud, its only noticable during silent parts of the music. It goes away if I remove the either both the subwoofer RCAs or both the front speaker RCAs from my amp (only subs and fronts are running off the amp). It doesn't change when the car is on or off or with engine rpm. It does change when I adjust the gain to the front speakers on the amp. It doesn't change much when the volume on the head unit is changed. Its on right from when the head unit switches on to when its turned off. As to my install, I've got my speaker wires running up under the roof trim, my amp power wire running in the lower door foot trim and my RCAs running down the center hump. I've checked my ground point, cleaned it back to bright shiny metal, installed a washer to help apply pressure. I'm pretty sure its not the speakers because they were fine before the install and are fine when the subwoofer RCAs are pulled. My only ideas how to fix it now are to completely relocate the gound point. Its currently into body metal on the front of the trunk - for those familiar with commodores its into the seat support metal in the sedan. I could probably move it lower down so it was directly onto frame material but I'm not sure it would help signifcantly - its already on a well integrated piece of steel. Another idea would be to start moving cables around... but where? - everything it as far away as I can see practical. Finally my last option I guess is to check the ground on the head unit - its currently to the factory ground wire - I assumed this would be sufficient. So any ideas people? - is it likely that it could be a problem with the head unit? The head unit has 6 pre-outs - 2 front, 2 rear, 2 subs. I'm using the 2 front and the 2 subs with the rear speakers being driven off the headunit preamp. It it possible it could be the amp? I wouldn't have thought so since it seems capable of making noise free music under some circumstances. Anyway, any help would be greatly appriciated - especially if it would save me the hassle of ripping stuff out again. Any body interested in my install so far can check out http://allen.alphadimensions.net/~aidan/audio.htm best regards Aidan To reply remove the .au and swap the allen and alphadimensions in my address. -- ____________________________________________ BE(Mech) Hons (Mat. Eng.) |
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#9
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Yes its a noise question... sorry
Yep thats the sum of it. The original remote on lead was intergrated into an
RCA, I replaced it with the dedicated one that came with my amp wiring kit and no more noise... needless to say I was pretty happy - a no cost complete solution =) Aidan -- ____________________________________________ BE(Mech) Hons (Mat. Eng.) "Paul Hanley" wrote in message om... This was fixed by replacing the remote turn on lead with a new one right? I have a noise issue that different grounding schemes have not resolved, and I am about to place a relay in the chain for the remote turn on lead. Paul "A. Allen" wrote in message ... must admit I'd like to get rid of the noise by 'natural means' first... worst comes to worst I may try a ground loop isolator but it'll probably a last resort. Thanks for the tip anyway. I must mention that radioshack isn't the most common of brands over here (they are distributed through another retail chain) so I may have trouble even finding one. regards Aidan -- ____________________________________________ BE(Mech) Hons (Mat. Eng.) "news.adelphia.net" wrote in message news Try a RadioShack ground loop isolater ($15) between the head unit and the amp to see if things quiet down. Try to be sure none of the RCA outer shells are touching ground anywhere. Good luck "A. Allen" wrote in message ... Hi all - I vowed I wouldn't join the masses and post a question to help with a noise problem - but I've got one, and my reading and attempts so far haven't fixed it so... I recently installed a new amp (Boss Audio), subs (Pioneer 10") and head-unit (Panasonic CQ-DFX572 - I think its an international model and may be called something different in other countries) in my Commodore (for you aussies). Since the install my front speakers (Kenwood 6") have exhibited an audiable buzzz. Its not particularly loud, its only noticable during silent parts of the music. It goes away if I remove the either both the subwoofer RCAs or both the front speaker RCAs from my amp (only subs and fronts are running off the amp). It doesn't change when the car is on or off or with engine rpm. It does change when I adjust the gain to the front speakers on the amp. It doesn't change much when the volume on the head unit is changed. Its on right from when the head unit switches on to when its turned off. As to my install, I've got my speaker wires running up under the roof trim, my amp power wire running in the lower door foot trim and my RCAs running down the center hump. I've checked my ground point, cleaned it back to bright shiny metal, installed a washer to help apply pressure. I'm pretty sure its not the speakers because they were fine before the install and are fine when the subwoofer RCAs are pulled. My only ideas how to fix it now are to completely relocate the gound point. Its currently into body metal on the front of the trunk - for those familiar with commodores its into the seat support metal in the sedan. I could probably move it lower down so it was directly onto frame material but I'm not sure it would help signifcantly - its already on a well integrated piece of steel. Another idea would be to start moving cables around... but where? - everything it as far away as I can see practical. Finally my last option I guess is to check the ground on the head unit - its currently to the factory ground wire - I assumed this would be sufficient. So any ideas people? - is it likely that it could be a problem with the head unit? The head unit has 6 pre-outs - 2 front, 2 rear, 2 subs. I'm using the 2 front and the 2 subs with the rear speakers being driven off the headunit preamp. It it possible it could be the amp? I wouldn't have thought so since it seems capable of making noise free music under some circumstances. Anyway, any help would be greatly appriciated - especially if it would save me the hassle of ripping stuff out again. Any body interested in my install so far can check out http://allen.alphadimensions.net/~aidan/audio.htm best regards Aidan To reply remove the .au and swap the allen and alphadimensions in my address. -- ____________________________________________ BE(Mech) Hons (Mat. Eng.) |
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