loud tone from the subs at shut off
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=91878
Printed Date: May 02, 2024 at 7:34 AM
Topic: loud tone from the subs at shut off
Posted By: pldtj
Subject: loud tone from the subs at shut off
Date Posted: March 19, 2007 at 7:01 PM
i have an 05 dodge neon that i installed a pair of subs and an amp in, when i shut the car off i get this very loud bass tone that lasts about 2 to 3 seconds, also if i turn the head unit off while the car is running it does this continually. i had this equipment installed in my previous car with no problems at all. everything is new only about 2 months old. Im afraid this is going to fry my subs. any suggestions would be greatly appreciated Stock head unit infinity 311a amp polk db104 subs
Replies:
Posted By: pro17
Date Posted: March 20, 2007 at 2:12 AM
you may want to check your ground wire and make sure that it is getting a good solid ground. Also check your gain levels and have them properly set. And you might as well check your connections from your stock headunit to your amplifier.
Posted By: coppellstereo
Date Posted: March 20, 2007 at 9:19 AM
where are you getting your remote turn on signal?
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Posted By: pldtj
Date Posted: March 20, 2007 at 5:59 PM
from the fuse box, i used the radio fuse, I couldnt figure out which wire was remote from the head unit I als tried the cigarette lighter to see if I got the same response and did there as well.. Ive checked all connections they all seem pretty secure, as for the ground I drilled a hole in the rear deck (metal of course)between the factory speakers and secured it there.
Posted By: swerve
Date Posted: March 20, 2007 at 6:23 PM
it sounds like your amp is constantly on, i would check your remote turn on wire and see if it is constant or not. the only wire you can use from the factory deck would be RED / white which is your ignition wire. it should only have power when the key is in acc, or on position.
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git yer swerve on!
Posted By: pldtj
Date Posted: March 20, 2007 at 9:05 PM
I messed with it earlier and rehooked the ground, it did fine for a bit then it happened again, its like something is building up in the system. I did redo my remote to the RED / white wire.It wasnt constant before though, it turned off with the ignition. i took the ground lose and sanded around the connection so it was on totaly bare metal and i thought it was fixed but after a bit it did it again. its like when i lose the ground something resets, and then builds up again. its got me by the sack ! I do have the inputs ran through a loc, im gonna read up on it to see if maybe there is something up with it.
Posted By: joshv06
Date Posted: March 21, 2007 at 2:18 PM
Check your gains on your amp, maybe they are set too high. I had the same problem when i switched to a newer deck with a higher preout voltage. good luck
Posted By: pldtj
Date Posted: March 21, 2007 at 11:34 PM
just a thought but maybe it is the way I hooked the inputs? I just tapped the rear outputs to the rear speakers with some inline wire taps, the output is also powering the rear speakers as well as the amp input,might it be to much drain on the signal causeing this? I am gonna try unplugging the rear speakers and see if I get the same result, I will post my result after I try it,
Posted By: pldtj
Date Posted: March 22, 2007 at 3:59 PM
Ok well I did unplug my rear speakers and the feedback stopped, now I know I cant just tap the rears for the amp inputs! Done it before but I guess theres something different with the neon. Thanks for all the suggestions from everyone.
Posted By: pldtj
Date Posted: March 22, 2007 at 4:04 PM
One more thing, anyone have picks of installs in newer neons? Just looking for some suggestions on how to mount everything so it looks good and everything is out of the way and funcional. at the moment I have my amps mounted to the backs of the rear seats and the loc in the trunk, I havent hooked the amp up that I have for my front speakers yet,planning to put them on a cheap 400 watt 4 channel so there is a little ballance between the bass and the music.
Posted By: loosingmymind
Date Posted: March 22, 2007 at 10:18 PM
Put your line-output adapter behind the radio. Ground the line-out adpt. to the ground tie strap that you find there. That should fix it. You don't have to cut out your rear speakers. Try that, David
Posted By: loosingmymind
Date Posted: March 22, 2007 at 10:39 PM
Oh yeah. Also I don't suggest running gains at max. Your power detail will dictate you root means square power. David ------------- David Fancher
USACi World Finals 2006
4th Place SQ PRO 601+
Posted By: pldtj
Date Posted: March 23, 2007 at 1:47 AM
Thanks, my gains arent set that high, only a little ver half. It has 3 other adjustments that make alot of difference on this amp. DBO,Freq,bass boost.I was planning on doing a little rewiring and put it somewhere in the dash, there isnt much room behind the head unit though, I was thinking about putting it behind the glove compartment, more room there.I have the Sven4 The instructions are pretty vague on that thing,it has a ground coming from both input and out on the harnesses, you know how I actually ground that thing? I actually have another amp that I am gonna hook up when I do my rewiring, run it to the inside factories. one thing Im wondering about though is the car has a 6 speaker system stock, are the fronts and the tweets wired from the same outputs in the front, If I'm not mistaken there are only 8 outputs in the OEM harness.I really didnt look at it that hard when I was wiring remote up.Guess I'll just have to take it back apart and look.
Posted By: duct tape
Date Posted: March 23, 2007 at 6:49 AM
the problem, is that the speaker wires still have some sort of voltage on them when you turn the radio off. the best fix would be to find the factory amp turn on wire behind the factory radio and use that to turn the amp on and off with the radio. if that wire isnt available, then you could put a switch inline on the remote wire up at the dash. this way you can cut off the amp before you turn off the car so you dont have to hear the hum. -------------
Posted By: jmelton86
Date Posted: March 23, 2007 at 11:17 AM
I would suggest a switch on your remote turn-on wire to prevent battery drain when you crank the car up. Like duct tape suggested also.
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2013 Kia Rio -90a alternator
DDX470HD GTO14001 GTO1014D (x3)
Big3 in 1/0G
1/0G to GTO14001
Posted By: pldtj
Date Posted: March 26, 2007 at 12:39 AM
ok well I got the noise figured out, it was the way I had the inputs tapped from the rear speakers. But now I was wondering if anyone has had any experience with the sven4 by peripheral and how the ground works on that thing. It has 2 ground wires, one from each wiring harness, one on the input and one on the output. Im assuming it grounds inline but how? Like I said in one of my earlier posts the directions are very vague for it.
Posted By: swerve
Date Posted: March 26, 2007 at 11:47 AM
i only hook up the grounds on that thing if the system is making noise otherwise i dont hook it up.
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git yer swerve on!
Posted By: pldtj
Date Posted: March 27, 2007 at 2:15 AM
Well the reason I was aking is that now that I have the other amp wired to the front and rear factories, it has a static with the volume turned all the way down, not too loud but just enough to grate on you after a bit. I just dont know how Im supposed to ground it since it has 2 wires.
Posted By: jmelton86
Date Posted: March 27, 2007 at 2:38 AM
Im confused. You don't know how to ground it cause it has 2 wires? Please explain.
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2013 Kia Rio -90a alternator
DDX470HD GTO14001 GTO1014D (x3)
Big3 in 1/0G
1/0G to GTO14001
Posted By: pldtj
Date Posted: March 27, 2007 at 1:47 PM
it's explained 2 posts up. What im asking is how I ground it? 2 ground wires, would i just ground them both to the chasis? Im talking about the sven4 not the amp.
Posted By: swerve
Date Posted: March 27, 2007 at 2:52 PM
ground them both to the chassis. how do you have the loc set? is it set wired or rca in?
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git yer swerve on!
Posted By: pldtj
Date Posted: March 28, 2007 at 12:14 PM
Wired in and rca out
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05 Neon SXT/infinity 311a/2 Polk db104 subs/vr3 400 watt to factory front and rear
Posted By: pldtj
Date Posted: March 28, 2007 at 12:17 PM
wired in with 8 wires for inputs and a ground, so 9 wires in and rca out with a ground wire
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05 Neon SXT/infinity 311a/2 Polk db104 subs/vr3 400 watt to factory front and rear
Posted By: pldtj
Date Posted: April 19, 2007 at 11:47 PM
Just to let eveyone know, I got all the bugs worked out of my system now, all is well in the Neon now. thanks for the help guys!!
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05 Neon SXT/infinity 311a/2 Polk db104 subs/vr3 400 watt to factory front and rear
Posted By: jmelton86
Date Posted: April 19, 2007 at 11:50 PM
Well, how?
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2013 Kia Rio -90a alternator
DDX470HD GTO14001 GTO1014D (x3)
Big3 in 1/0G
1/0G to GTO14001
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