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Ground loop problem


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So in my car i currently have the following:

Fi SSD 18" w/ 9cuft box @ 32hz

Old 380w soundstream amp powering it (temporarily)

Alpine SPR-13S components

Hifonics HFi100.2 for the alpines

Pioneer DEH-2100IB

I have a set of 8 gauge wire running to the soundstream amp as its only 15 amps. The Hifonics has 4 gauge wire.

I recently got the hifonics for my front stage. Before i installed it there was no buzzing in my speakers. Once i installed it I had a buzzing problem. So, ok, ground issue. I redid all my grounds.

Grounds coming off battery:

0000041v.jpg

First ground:

0000039d.jpg

Second ground:

0000040.jpg

First amps ground:

0000045b.jpg

Second amps ground & head unit ground (no metal behind head unit to ground to):

0000043.jpg

Didn't fix the buzzing problem. So I rerouted my RCAs which were on the same side as the power wiring, thinking that must be the problem. Still didn't fix it. I was told about the pico fuse problem with Pioneer decks, so i went about soldering the board today, put it back in and still had buzzing.

I'm not sure what else to do besides buy a ground loop isolator, but I heard those can degrade sound quality, or half the volume etc. I really want to fix the problem without using one, but I'm lost on this.

Anyone have any idea how I can fix this ?

Fi SSD 18/ 9cuft @ 32hz

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Dude put a bolt through the chasis and ring terminal those. Those are horrible grounds.

--2004 Toyota 4runner

New Build Log

-2002 Acura Tl-S

Old Build Log

Team DC Audio

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spl dust is an option you can get on the coils... it's great for extra 1000 watts of power

where can i get this spl dust and how much is it. is it hard to apply? lol
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I'm just gonna put it out there that those aren't what I would call good grounds.

But the source of your issue, I'm 99% sure, if your Pioneer deck. You've probably blown the fusible link on the RCA circuit, if it has one, or the stupid 'resettable thermal link' they use in the new ones has popped and not reset. Like most of them.

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10.x volts fo' life!

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They all looked pinched underneath a piece of metal to me and with self tappers.

--2004 Toyota 4runner

New Build Log

-2002 Acura Tl-S

Old Build Log

Team DC Audio

ttf.png

spl dust is an option you can get on the coils... it's great for extra 1000 watts of power

where can i get this spl dust and how much is it. is it hard to apply? lol
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