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Discussion Starter #1
its about time for me to finally build my new sub box.

Before i ripped it all out i was having some ground loop problems where i got the sound of the engine playing through the subs (turns out that was like actually the sound of the alternator or something)

i installed a ground loop isolater and i slightly helped. subs were WAYY quiet, but the noise was still there, not as bad at all, but still there. i didnt have time to mess with it so i just pulled it all out.

before i build this box, how on earth do i fix this problem? is it because im running the ground and the power next to each other) the ground has that black plastic covering around it in the cab, not in the engine bay though.

ideas? solutions?

thanks.
 

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I has alternator whine in my last system, but it wasn't to do with the subs themselves, it was actually coming from the headunit. In mine there were 2 small fuses that cancelled any electronic interference that had blown and I didn't want to take my head unit apart to fix them, so I just grounded the head unit housing and RCA jacks and that cut it out almost completely.

Running your power/ground next to each other isn't an issue, if you were running the RCAs and power next to each other, that's a different story.
 

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I don't know if you have installed a HID light kit. Sometimes the ballast from the HID lights give off radio interference.

Make sure you use shielded RCA cables for speaker hookup and not a single wire with a common frame ground.

Power your amp directly from the battery and ground your amp as close as possible to a frame ground. Use the same gauge wire for positive and ground wires for the amp.
 

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Discussion Starter #4
I has alternator whine in my last system, but it wasn't to do with the subs themselves, it was actually coming from the headunit. In mine there were 2 small fuses that cancelled any electronic interference that had blown and I didn't want to take my head unit apart to fix them, so I just grounded the head unit housing and RCA jacks and that cut it out almost completely.

Running your power/ground next to each other isn't an issue, if you were running the RCAs and power next to each other, that's a different story.
how do you ground the case? how to you ground RCAs? I might also be looking into a newer aftermarket stereo with 3 sets or pre outs, mine only has 2. Could that also possibly help?
and the power and the RCAs are ran on the opposite side.
I don't know if you have installed a HID light kit. Sometimes the ballast from the HID lights give off radio interference.

Make sure you use shielded RCA cables for speaker hookup and not a single wire with a common frame ground.

Power your amp directly from the battery and ground your amp as close as possible to a frame ground. Use the same gauge wire for positive and ground wires for the amp.
i do not have HIDS haha. Its also the same gauge and grounded AT the battery.
 

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how do you ground the case? how to you ground RCAs? I might also be looking into a newer aftermarket stereo with 3 sets or pre outs, mine only has 2. Could that also possibly help?
and the power and the RCAs are ran on the opposite side.
take a short length of bare electrical lead (not single strand wire) and wrap it around the outside of each RCA post and collect them at any exterior casing screw, this grounds the negative side of the RCAs to the case if you have an internal RCA ground fuse gone. Then take the a lead and from another exterior case screw and run it to a clean body ground, this will ground the case to the frame, and should alleviate any RCA signal distortion.

Multiple RCAs won't cause any issues, they are just signal outs, but if you do get a new head unit, that would be a simple way to tell if you have RF interference or RCA noise.
 

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Discussion Starter #6
take a short length of bare electrical lead (not single strand wire) and wrap it around the outside of each RCA post and collect them at any exterior casing screw, this grounds the negative side of the RCAs to the case if you have an internal RCA ground fuse gone. Then take the a lead and from another exterior case screw and run it to a clean body ground, this will ground the case to the frame, and should alleviate any RCA signal distortion.

Multiple RCAs won't cause any issues, they are just signal outs, but if you do get a new head unit, that would be a simple way to tell if you have RF interference or RCA noise.
I meant that as in either way i might be getting a new head unit so i can amp all 4 of my 6x9s. AND still have a sub out as well, instead of a front and rear/sub. My bad.

Would you recommend to ground the RCAs only if I've blown that fuse? Where is that fuse?
 

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Discussion Starter #7
(second post)

just did some more googling

LINK FOR REFERENCE
http://www.hondacivicforum.com/foru...0/pioneer-headunit-pico-fuse-fix-*56k*-75438/

take a short length of bare electrical lead (not single strand wire) and wrap it around the outside of each RCA post and collect them at any exterior casing screw, this grounds the negative side of the RCAs to the case if you have an internal RCA ground fuse gone. Then take the a lead and from another exterior case screw and run it to a clean body ground, this will ground the case to the frame, and should alleviate any RCA signal distortion.

Multiple RCAs won't cause any issues, they are just signal outs, but if you do get a new head unit, that would be a simple way to tell if you have RF interference or RCA noise.
so what you're saying is to do what picture number one is in that link?
(you may not know the answers to the following because thats not your thread)
why are they grounded at 2 spots? Just to tighten the wire so it doesn't move?
i also noticed the left side is almost grounded to like, the box, whereas the right is more the frame of it. Does that location matter?

THEN after that you're saying to take the location that i grounded the RCAs at(or anywhere on the case) and ground that point at the frame. Would grounding that at the battery work?

And later on that site is says they're pico fuses, correct? So basically unless i want to rip apart my stereo and do some soldering, those fuses are not going to be replaced. So grounding the RCAs would be the best option.
 

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I have wires running on both sides, up and down, everywhere. I have 0 noise issues. What kind of Amp? What are your gains set to? Where is your amp grounded? For my grounds, I used a child tether bolt behind the rear seats. I removed the tether strap, scraped the paint down to bare metal, and grounded my amp + AudioControl LC6i there. I have 0 noise, and 0 turn on/off issues.

Also try grounding your RCAs as already mentioned. Some noise just won't go away. I had it once in an older car.
 

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Discussion Starter #9
i used to have zero noise. but it happened first when i put another set of 15s in my bed. We thought it was just the subs or something, cause it didnt happen to the one in the cab.

im grounding it at the battery. All the gains and stuff like that are set relatively good. I know PA audio stuff and thats basically what all that is.

i running an SPL Z2X-1600 with a JVC Headunit. not sure on the exact model.
 

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Discussion Starter #11
whats the point of a short ground?

yes, a new amp

i plan on putting both the amps on the 10s box in the cab. Then just taking the speaker wire to the bed with the 15s.
amps i plan on using distribution blocks for the power and ground since they're so close together.
 
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