Booming won't stop
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=43567
Printed Date: June 17, 2024 at 12:13 PM
Topic: Booming won't stop
Posted By: offroadbum
Subject: Booming won't stop
Date Posted: November 22, 2004 at 4:23 PM
I just installed an amp and a sub box. The subs just pluse BOOM BOOM BOOM.It doesn`t matter if the head unit is up or down. I`ve rewired twice,changed amps3 times,move the ground alround the truck,but it doesnt change. Anybody ever heard of this before? I`ve do this same install a 100 times and never had anything close to this happen. Pioneer p440 comp vr 12`s orion 8002
Replies:
Posted By: jeffchilcott
Date Posted: November 22, 2004 at 4:30 PM
check your speaker wiring and power and ground lines..make sure rca's are connected correctly to the deck and to the amp, that they are both in the proper in and out spots
-------------
2009 0-1000 Trunk WR 154.0DB 2009 1001+ Trunk WR
2007 USACI World Champion
2007 World Record
2006 USACI Finals 2nd Place
Posted By: offroadbum
Date Posted: November 22, 2004 at 4:33 PM
I`ve gone through the wiring twice already. Something is giving it a signal,but what??
Posted By: Ravendarat
Date Posted: November 22, 2004 at 4:34 PM
Loose or defective RCA is my best guess
-------------
double-secret reverse-osmosis speaker-cone-induced high-level interference distortion, Its a killer
Posted By: offroadbum
Date Posted: November 22, 2004 at 4:37 PM
I`ve changed the rca`s 3 time and no help
Posted By: Ravendarat
Date Posted: November 22, 2004 at 4:40 PM
Does it still do it if you unplug the RCA's from the amp
-------------
double-secret reverse-osmosis speaker-cone-induced high-level interference distortion, Its a killer
Posted By: offroadbum
Date Posted: November 22, 2004 at 4:44 PM
nopeno output at all
Posted By: Ravendarat
Date Posted: November 22, 2004 at 4:48 PM
What the hell does nopeno mean, If that means no than it means that the problem lies in either the RCA inputs on the amp, the RCA outputs on the deck or the cables. If the deck has multiple out puts try hooking up to another set, Is this using a factory deck or after market?
-------------
double-secret reverse-osmosis speaker-cone-induced high-level interference distortion, Its a killer
Posted By: offroadbum
Date Posted: November 22, 2004 at 4:52 PM
Sorry for the typo!! nope no output it is a pioneer p440 and yes i have changed at the deck
Posted By: Ravendarat
Date Posted: November 22, 2004 at 4:54 PM
I think you need to take your amp and get it bench tested at a local shop
-------------
double-secret reverse-osmosis speaker-cone-induced high-level interference distortion, Its a killer
Posted By: offroadbum
Date Posted: November 22, 2004 at 5:05 PM
I`ve got my own test bench.But as i said in my post I`ve changed amps already. But when i did a search of the web I`ve found that people have had the same problem with the pioneer decks, but no one has had a solution.That what promted my post I also said in my post that this is not my first install.I`ve gone all the routes to eliminate noise,but it hasn`t helped.This is a strange problem to me,I`ve never heard of it before today.
Posted By: DYohn
Date Posted: November 22, 2004 at 5:38 PM
Could be several things. Where is the input gain set? If it's maxed out you could be simply overdriving the amp. Most likely cause after that is RCA cables or bad amp, but since you've eliminated that I'd have to say defective head unit. Pioneer decks are not known for being the best made things in the world... ------------- Support the12volt.com
Posted By: offroadbum
Date Posted: November 22, 2004 at 5:48 PM
the input gain,the noise just goes up and down with it. as for the deck the speakers that I`m running off the output there work just fine.I`ve never seen preamp outputs go bad without the speaker outputs going out,but there is a first time for everything. but i do have another deck that i`m going to try in the morning.
Posted By: Poormanq45
Date Posted: November 22, 2004 at 6:47 PM
offroadbum wrote:
as for the deck the speakers that I`m running off the output there work just fine.I`ve never seen preamp outputs go bad without the speaker outputs going out,but there is a first time for everything.
Does the HU have a gain control on it? Or some sort of level control for the RCA outputs? Preamps will go bad if the signal being fed to them is too great. This would be caused by the gain being set too high. Does the same thing occur when you play CDs? -------------
Posted By: bumpingjeep
Date Posted: November 22, 2004 at 6:58 PM
i see that happen at least three times a year...it sometimes also happens in the exact opposite...high levels bad but preouts good...i will say one thing though...even though it sounds like you have changed everything like three times over...after changing out the deck...assuming thats the problem which seems to be the case...make sure to check everything else one more time...although i have seen this happen quite a few times before...i have never seen it happen where there wasn't already something wrong with either A) Amp B) Subs C) Wiring D) Install E) All of the above not a personal attack...but it doesn't hurt to make sure
Posted By: Ravendarat
Date Posted: November 22, 2004 at 10:53 PM
Ya, sorry I missed where you said you switched out the amp. I have also seen the preouts go bad but the internal amp remains fine. If you have checked everything as thourgh as you have said then the deck really seems like the only possible problem left. Tell us what happens
-------------
double-secret reverse-osmosis speaker-cone-induced high-level interference distortion, Its a killer
Posted By: offroadbum
Date Posted: November 23, 2004 at 12:27 PM
Ok I called pioneer and what they had to say is that the internal amp is drove by the preamp.But the preamp output can go bad.So if you own a pioneer and you have the same problem,take a voltmeter and check the output of the preamp if it is more than 500mv ac (Yes AC) then it is bad. Mine read 575ma ac so it was bad. Changed the deck and now when I go to feed the cows they`ll be boggin` in the pasture. Alot of trouble for and old farm truck but somtimes you got to make the animals happy. Thanks for the help guys.
|