hissing noise from tweeters
Thread Starter
Junior Member
Joined: Nov 2011
Posts: 57
Likes: 0
2008 cl550
hissing noise from tweeters
hello guys
i am having a issue i have a 2004 sl55
i did a full sound system on it
and the tweeters are having a hissing noise from tweeters when car is idle
there is no hissing noise when car is just ignition on
i have 3 way focal krx3 for the fronts
powered by phoenix gold ti 1000\4
very thick monster cable rca
subwoofer 13" w5 shallow
powerd by a jl audio 500\1
with the new pioneer double din
with a monster cap
i have tried gounding it on battery to see what happens makes a worse hissing noise
now im using the ground near the pse pump which is a very firm ground
i have check rca speaker wire everything is monster cable
any idea? i even put a isolator ground loop still hissing
when i rev it no engine noise just hiss
please someone help should i ground it better i even try grounding the rca makes it worse
please help
sorry for poor english it is my 3rd language please help!!!
i am having a issue i have a 2004 sl55
i did a full sound system on it
and the tweeters are having a hissing noise from tweeters when car is idle
there is no hissing noise when car is just ignition on
i have 3 way focal krx3 for the fronts
powered by phoenix gold ti 1000\4
very thick monster cable rca
subwoofer 13" w5 shallow
powerd by a jl audio 500\1
with the new pioneer double din
with a monster cap
i have tried gounding it on battery to see what happens makes a worse hissing noise
now im using the ground near the pse pump which is a very firm ground
i have check rca speaker wire everything is monster cable
any idea? i even put a isolator ground loop still hissing
when i rev it no engine noise just hiss
please someone help should i ground it better i even try grounding the rca makes it worse
please help
sorry for poor english it is my 3rd language please help!!!
Senior Member
Joined: May 2013
Posts: 415
Likes: 9
2011 E350 Cabriolet
Modern cars spew all kinds of spurious RF and computer garbage that tired old analog can't deal with. You may never find the actual cause of the hissing which sounds less like a ground loop. You may need to try everything to bypass capacitors in all the correct places? or even a Mu metal shield around sensitive components. There are no real hard and fast rules when tracking down this kind of issue. Start with limiting the length and connections of RCA plugs/cables and route them far away from other wire bundles. They tend to act like antenna for noise.
Newbie
Joined: May 2013
Posts: 10
Likes: 0
From: Somewhere By The Bay
w219
Did you check all your gronds and made sure they are short length and same gauge as power wire? If so then you probably dont have a ground loop and any isolators and additional grounding wont help.
Like he said you are probably picking up RFI somewhere between the deck and your amp isn't capable of filtering it out. With all the electronics in this car and modules it will be impossible to get rid of the noise.
I suggest you switching to a cable system that will NOT PICK up (or I should say is more resistant) any introduced RFI, Such as a true Symbilink setup (DECK->Zapco SLDIN.T -> Symbilink Cable->Amp) In order for it to work correctly you need to install the SLDIN.T Directly behind the deck and use a Symbilink cable from there to a compatible amp. If you extend it to the rear using an RCA cable you will not make any improvements because the RCA cables can easily pick up RFI so it must be eliminated all together.
http://www.stevemeadedesigns.com/boa...pco-symbilink/
Another option is to go with an optical setup (like the one that came with the factory radio) But that is very expensive and you are very limited on the amps you can use. RFI is the main reason why modern cars use the CANBUS and Optical link systems.
Good luck and let us know what worked out!
Like he said you are probably picking up RFI somewhere between the deck and your amp isn't capable of filtering it out. With all the electronics in this car and modules it will be impossible to get rid of the noise.
I suggest you switching to a cable system that will NOT PICK up (or I should say is more resistant) any introduced RFI, Such as a true Symbilink setup (DECK->Zapco SLDIN.T -> Symbilink Cable->Amp) In order for it to work correctly you need to install the SLDIN.T Directly behind the deck and use a Symbilink cable from there to a compatible amp. If you extend it to the rear using an RCA cable you will not make any improvements because the RCA cables can easily pick up RFI so it must be eliminated all together.
http://www.stevemeadedesigns.com/boa...pco-symbilink/
Another option is to go with an optical setup (like the one that came with the factory radio) But that is very expensive and you are very limited on the amps you can use. RFI is the main reason why modern cars use the CANBUS and Optical link systems.
Good luck and let us know what worked out!
