volume cuts out

Hey guys. New to the forum and hoping you can help me out. I just redid the sound system in my truck and it's giving me a weird problem. At random times the speakers will get quieter. The volume number on the radio stays the same though. I'm leaning towards a grounding issue or possibly my alternator not putting out enough juice. Also my amps (2 Arc Audio FD4100's) have the power connections where you just strip off part of the insulation and put the wire in and tighten the set screw. What's the best way to terminate this? Thanks guys. Brandon

Also not sure if any of it helps but here's my setup: Kenwood KDC-X993 Arc Audio Arc-6000's in the doors Arc Audio FD5000's in the rear Two Arc Audio FD4100 amps A cheap pioneer 12" I'm using since the JL's I want are on back order... I'm using Stinger HPM3 RCA's 12 GA wire to all the speakers 1/0 GA wire to a dist. block for pos and neg 4 ga wire from the dist blocks to the amps for pos and neg And a partridge in a pear tree.... :) Brandon

LOL at the xmas song. My first Q, is why did you re-do your set up? did you add anything that wasn't there before? Did you changed the RCA wiring configuration? Does the problem happen after a certain time, or only while you are driving? Or is it completely random?

It was still the stock stuff before. So I upgraded. The times that it does it is random. Now primarily it's quieter and then sometimes it gets louder, and the bass hits harder. Like it's getting more power from some where.

Is it just the interiors losing volume or subs and interiors??? All speakers are remaining ON during the volume loss? Where did you ground the dist block...How long is the ground? Do you have a DMM?M.E.C.P & First-Class

Go slow and drink lots of water...Procrastinators' Unite...Tomorrow!

tommy... wrote: Is it just the interiors losing volume or subs and interiors??? All speakers are remaining ON during the volume loss? Where did you ground the dist block...How long is the ground? Do you have a DMM?

It's all the speakers. They do remain on during the volume loss. The dist block is grounded the B-pillar. There was an existing whole there so I put the ground lug on the ground wire over it, traced out the shape of the lug, sanded it down to bare metal, and bolted the ground wire to that with a 1/4-20 bolt. The main (1/0 ga) run of the ground is maybe only 2 feet long.... 2.5 tops. So not that long. And yes... I've got a DMM. Was going to check the resistance from the dist block to the battery over the weekend... As well as finish my "big three" wiring up grade.

Its the Head Unit. I betcha.

icearrow6 wrote: Its the Head Unit. I betcha.

Man I hope not. I've already had to exchange the thing once because it would shut its self off after a few seconds. I'd have to unplug it for about 10 minutes and then it would come back on....

If it does it pretty often...sit back ate the amp w/ your meter and see if there is any power loss at volume loss...do the words sound muffled when "IT" happens or just volume is lossed?M.E.C.P & First-Class

Go slow and drink lots of water...Procrastinators' Unite...Tomorrow!

Do you have another deck laying around...? If so try wiring that up...You used differ rca outs for sub amp and interiors?M.E.C.P & First-Class

Go slow and drink lots of water...Procrastinators' Unite...Tomorrow!