Alright, I have a 99 Integra sedan, and I just put in two amps. (RF Punch 250a2 and a RF 400a4). I spent the entire afternoon trying to find a decent grounding point...........and I am still catching a lot of noise. At first I tried to just ground it to some sheet metal in the trunk.......not good. Then I tried to mount it down by the spare tire.........no better. Then I took out the rear seat and mounted it to a bolt that holds the back of the seat in place........better, but still not great. Then I tried to mount it to where the seat belts are attached, but the bolt is way to big for my ring terminal (Stinger gold plated ring terminal connected to 4 ga grounding wire).........right now I have it mounted to the metal next to where the seatbelts attach.......it is marginal at best.......what should I do? Any suggestions? Is there an easy fix for this? And before anyone suggests sanding the paint and stuff away to get a "clean" fit, I already did that. TIA.

Pat

 

measure impedance from your ground point vs the negative post on the battery.

find some where that measure less than 1 ohm, and that should work. worst case, run a ground from the battery (same ga. as your power wire).

 

if u lift the carpet and particle board up in the trunk u should see 4 bolts 2 on one side 2 on the other , sand that **** shiny and ground it. thats where mine is grounded. may be different though cuz i have a 99 civic but its possible it may be the same

 

That is what I did, there are 4 bolts that are reasnobly sized, I've only used one to ground 2 bp1200.1, with no problems, so it should work fine for you. (but I do have a civic so it might be different) If that doesn't work, try running the wire to the negative post.

 

what kind of rca wires are you using?? you can always tell a difference in the quality of rca's if you buy cheap ones first.. get good rcas and also try running the rca's on the opposite side of car and possibly turn the gian down on the amps..

 

RCA's are Stinger........
RCA's are on the driver side and power is on the passenger side

Also, this whole system came out of my 2.2 CL (where it was running perfectly), so I know that the RCA's and such are fine........just need to find a decent ground point.

Thanks guys.....keep the suggestions coming.

 

I used my rear seatbelt bolts. I used a dremmel to make the holes in the ring terminals large enough to fit over the bolts. I have two amps grounded to two different bolts, and I have no noise.

 

honestly going to the battery is a great ground. The chassis isn't really metal designed to carry a current (like a copper wire is) and the chassis is also carrying all the other grounds for the car. Running to the battery gives the amp the best ground possible, but isn't really needed or practicle

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rjr162 &raquo;</TD></TR><TR><TD CLASS="quote">honestly going to the battery is a great ground. The chassis isn't really metal designed to carry a current (like a copper wire is) and the chassis is also carrying all the other grounds for the car. Running to the battery gives the amp the best ground possible, but isn't really needed or practicle</TD></TR></TABLE>

Do I need to run a 4 ga all the way up to the battery then? Will this distance cause problems? Should this go on the side with the power cable or the RCA's?

 

def measure the impedence if you can, do you have the power/switch wire running down the opposite side of the car ex. power down driver side/ RCA down passenger side, also try the rear bumper support bolts, make sure you use a little sandpaper to clean off the paint for a good connection, also try and run as SHORT of a cable as you can... the shorter the better less interferiance, and neutral ground current

I don't recomend going all the way back to the Batt. for a ground, WAY TOO LONG will pick up tons of noise!!

 

if it's alternator noise, maybe your radio is the grounding fault. If this is the case, the ground will try to travel down the RCA's to ground at the amp, which results in the noise (that's how RCA filters work, they typically use an audio transformer to block the DC, since DC won't go past a transformer but AC can pass freely). Make sure your radio's ground is good, and if all else fails try using one of the DC Isolators (RCA Filters)

 

if ur worried about distance to your battery u could always take the extra step and move ur battery to the trunk like most of my friends do

 

i grounded mine at the rear strut bolt,where the strut sicks thru from underneath,i have a rockford bd1000,jl 300/2 and a alpine 3553.working good so far!!

 

im grounded in my room.