[cnate777]

So this is what I have......for about a month I have had the 360 hooked up to just my subs.....today I went ahead and threw my 4 channel in.....well I got it all hooked up and before the 360 comes on I have no feedback....but once the 360 comes on completely i get noticeable feedback coming from the interior speakers......I tried throwing ground loop isolator on the rca's and it got worse.....tried switching grounds and it didnt help.....I ground the rcas and that helped a little but there is still noise.......any buddy have any idea........thanks

[brewer_brewer]

cnate777, on Jun 15 2009, 07:04 PM, said:

So this is what I have......for about a month I have had the 360 hooked up to just my subs.....today I went ahead and threw my 4 channel in.....well I got it all hooked up and before the 360 comes on I have no feedback....but once the 360 comes on completely i get noticeable feedback coming from the interior speakers......I tried throwing ground loop isolator on the rca's and it got worse.....tried switching grounds and it didnt help.....I ground the rcas and that helped a little but there is still noise.......any buddy have any idea........thanks

pioneer headunit?

[emperorjj1]

the 3sixty is a very fagile device. any even small amout of ground loop you may have will get amplified. The GLI is just a bandaid and ive noticed it did nothing for me either. So do what needs to be done to eliminate the ground loop. Run some 14g or whatever ground for the HU to the amps/ 360 make sure they are all groudned in one idividule location. run a ground from the battery to the amps ect ect. You have a ground loop somewhere now you need to find it and get rid of it. Took me a while and i was one step a head of you with the batterys in the back (possibly one step behind with multiple batteries... which in the end was my ground loop)

[cnate777]

brewer_brewer, on Jun 15 2009, 09:07 PM, said:

pioneer headunit?

Yeah it is but i already did the trick there.......

[cnate777]

emperorjj1, on Jun 15 2009, 09:10 PM, said:

the 3sixty is a very fagile device. any even small amout of ground loop you may have will get amplified. The GLI is just a bandaid and ive noticed it did nothing for me either. So do what needs to be done to eliminate the ground loop. Run some 14g or whatever ground for the HU to the amps/ 360 make sure they are all groudned in one idividule location. run a ground from the battery to the amps ect ect. You have a ground loop somewhere now you need to find it and get rid of it. Took me a while and i was one step a head of you with the batterys in the back (possibly one step behind with multiple batteries... which in the end was my ground loop)

So where was your ground loop???? with your batts?????so your saying ground the headunit to the where i have all the amps grounded too

[emperorjj1]

correct. i created alot of extra hassle adding in the second alt and second electrical system it made my 306's (both of them) pissed off

so the definition of a ground loop is multiple grounding locations and the noise created by an imbalance between them. The 360 just amplifies the noise it receives. Like i said its a fragile/picky unit. So you need to have as many electronic devices in the audio chain grounded to the least amount of locations. I used 2 sets of the 18g remote wire twisted to ground my HU to the back. I have a ground dblock and ran one to that and one directly into one of the 360's (i think... maybe just to the dblock) i soldered the connection at the HU and made sure it was a single run without any breaks or butt connectors or whatever. Now 2 runs and soldered connection might be overkill but the name of the game here is the least amount of resistance between the components so.

[Boon]

Yeah any pd between grounds will make the 360 noisy as hell. Re-do your headunit ground back to the battery would be my first pick.

[cnate777]

Boon, on Jun 16 2009, 12:05 AM, said:

Yeah any pd between grounds will make the 360 noisy as hell. Re-do your headunit ground back to the battery would be my first pick.

Ill try that...thanks....let you know tomorrow

[emperorjj1]

remember ur not supposed to use the ground in the harness at all, cap it off

[Mr. Ben]

emperorjj1, on Jun 15 2009, 10:01 PM, said:

correct. i created alot of extra hassle adding in the second alt and second electrical system it made my 306's (both of them) pissed off

so the definition of a ground loop is multiple grounding locations and the noise created by an imbalance between them. The 360 just amplifies the noise it receives. Like i said its a fragile/picky unit. So you need to have as many electronic devices in the audio chain grounded to the least amount of locations. I used 2 sets of the 18g remote wire twisted to ground my HU to the back. I have a ground dblock and ran one to that and one directly into one of the 360's (i think... maybe just to the dblock) i soldered the connection at the HU and made sure it was a single run without any breaks or butt connectors or whatever. Now 2 runs and soldered connection might be overkill but the name of the game here is the least amount of resistance between the components so.

did you ever here about when your twisting the wire to twist it counter clockwise with 3/4" between twists .....but yeh graounds are good factory is bad and same as above i would say that is all true it just sounds like your grounding your deck to the amps and if you have an antenna your deck is just going to use that as the ground insted of the twist because it is path least resistive to ground and yes the imbalance between them i always made new grounds for the system at the closest chassis ground and then "bonded" all the electronics with this power ground twist so all the electronics have a shortest cleanest path to ground and a bond to equal them all out ...makes sense to me

[cnate777]

I moved a few of my grounds around and made the ground loop less.....the best spot for the headunit was the factory.......it made R2 D2 sound quiet when I ran it back.......so the 4 ch, 360.2 and 1 of the t20001bd's are all grounded at one spot and the other t2000 in the other spot......and then all the batts and 2nd alt are ground to the same spot......i put ground loop isolator on it after I switched all my grounds around and it didnt do anything......I do that just to see if there is any improvement......does anyone have any other suggestions.........so the noise is there but barely.........