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Old 02-08-2010, 09:56 PM   #1
Speedster329
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Default speakers & sub cut off when i hit a bump!..help!

whats up guys i have a full system in my car (2002 wrx) and about a Month ago i realized that everytime i hit a bump or take a turn really fast my speakers and sub cut off....i have a pioneer f900bt installed and i have a

kiker l7 12"
kenwood 1800 watt Mono amp
Alpine 4 channel amp
Rockford fostgate hybrid Capacitor

the speakers are all wired directly to the 4 channel amp

everytime i hit a bump there goes all the sound and when it perfectly smooth and flat everthing turns back on...

sometimes when i jam on the brakes hard there goes the sound again! im thinking its a loose wire somewhere but checked behind the radio and nothing there. i was thinking it was mabey the remote wire that goes to the amp or the wire that recieves everything (the connection in the middle of the amp where ground and power go)

im really confused and dont know if its a loose wire somewhere or if its actually the Power wire straight from the battery or what?

any help would be greatly appreciated...thanks in advance guys and if any 1 needs a more better explenation of what its doing let me know i kind of wrote this up quick since im at work
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Old 02-08-2010, 10:05 PM   #2
jcfuzzdog29
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check your ground wire
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Old 02-08-2010, 10:13 PM   #3
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when you hit big bumps?

if so that is a protection feature on the cd player so the lense doesnt scratch the disc.
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Old 02-08-2010, 10:50 PM   #4
Speedster329
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yea every single bump or dip that i take or fast turn it decides to shut off on me and then come back on when its perfectly smooth riding or only when i come to a complete stop! and if i jam on the brakes hard it cuts right off again

i checked the ground...i took it off and relocated it as well
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Old 02-08-2010, 11:08 PM   #5
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Quote:
Originally Posted by silvercookie View Post
when you hit big bumps?

if so that is a protection feature on the cd player so the lense doesnt scratch the disc.
ive had the radio in 2 cars and really didnt skip at all when i hit the same bumps....when i 1st installed the system and everything it was perfect...all of a sudden it started cutting off and whatnot so im really confused
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Old 02-09-2010, 12:32 AM   #6
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Does your head unit shut off? Are your RCA cables on the pre-outs of the head unit lose/damaged? Have any bare wires somewhere that could be touching metal?

Maybe you could slide the head unit out and shake it/shake the wires while the car isnt moving to try to locate the problem?
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Old 02-09-2010, 09:56 AM   #7
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Quote:
Originally Posted by jcfuzzdog29 View Post
check your ground wire
BINGO!
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Old 02-09-2010, 01:38 PM   #8
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First of all, dump that junk capacitor, it does more harm than good.

Second, as suggested, check your ground from the amp.

Third, check your connections at the amp and battery.




Now, does the amp SHUT OFF, or does the sound CUT OUT? There is a difference.
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Old 02-09-2010, 04:44 PM   #9
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Quote:
Originally Posted by Audiosavvy View Post
First of all, dump that junk capacitor, it does more harm than good.

Second, as suggested, check your ground from the amp.

Third, check your connections at the amp and battery.




Now, does the amp SHUT OFF, or does the sound CUT OUT? There is a difference.
finally, someone that sees the light.
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Old 02-09-2010, 10:13 PM   #10
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Amp I don't think shuts off....wen I'm hitting bumps or slowing down on the brakes firmly it cuts off but sometimes everything plays very very low as if the volume was on 1....and then turns right back on....and the music cuts right off on fast turns and bumps and slowing down firmly.....th eheadunit does not cut off and sumtimes the vocals stays on and sub cuts out...most of the time tho everything cuts off (sub and speakers)I tokk the headunit out and jingled the wires mabey ill try it again while driving and see what happens....if not I'm gonna check all the connections and mabey ground the wire sumwhere else and see what happens
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Old 02-10-2010, 01:57 AM   #11
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check your distro block if you have one.

sounds like a wire is coming loose from a terminal.
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Old 02-10-2010, 05:53 AM   #12
b1kanobi
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In order to solve your problem you might want to figure out what might be causing it.


Try to eliminate possible causes :

1. try disconnecting all amplifiers, and try connect a speaker directly to the head unit, see if you can mimic the problem.

most probably you wont, but if yes then try swpping the HU with smething like a portable mp3 player or cd player directly to the amplifier.

2. try the connecting the 4 channel amp only, test, then do the same for the sub only amp...
etc...you get the point...


Get back to us with the results, hopefully the guys here should be able to help you much better. Try to see also if any of the components get hotter than ussual.

I'm guessing 1. bad ground, 2. loose cable connections, 3. thermal protect? (but most likely no)

good luck
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Old 02-10-2010, 10:36 AM   #13
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B1kanobi I appreciate all the input and as soon as all this snow leaves NY I'm going to go out there and try everything you have just told me! Will check for all loose cables and disconnect everything and try to figure this out because it's diving me crazy!! Lol
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Old 02-10-2010, 11:21 AM   #14
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I had similar problems In my last stereo build. Turned out to be bad rca connections. Narrowing down the cause can be frustrating good luck!!
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Old 02-10-2010, 02:27 PM   #15
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Quote:
Originally Posted by silvercookie View Post
finally, someone that sees the light.
Finally?....lol.... you are the noob here... lol... This isn't new info...
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Old 02-11-2010, 12:14 AM   #16
Speedster329
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yea i mean in every single car i have had i had a system and pretty much never encountered a problem like this...im going to deff look into checking out the RCA cables but which ones do you think i should check...the ones that go to the amp or the sub?? and what should i do to check them?

should i unplug the Subwoofer RCA cables and drive with just the 4 channel amp on so i can see if that cuts off and what not...and then vice versa or what are some suggestions from you guys?
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Old 02-11-2010, 12:29 AM   #17
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then stop installing this **** famo lmao
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Old 02-11-2010, 01:15 AM   #18
Speedster329
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its well worth it...i cant stand not having a sub and subaru speakers suck anyways from the factory! theres always problems to anything though...this is the 1st time happening to me but its cool because i can learn from this and then know in the near future if it happens again so i have to learn the hard way but all good
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Old 02-12-2010, 02:50 PM   #19
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Quote:
Originally Posted by Speedster329 View Post
yea i mean in every single car i have had i had a system and pretty much never encountered a problem like this...im going to deff look into checking out the RCA cables but which ones do you think i should check...the ones that go to the amp or the sub?? and what should i do to check them?

should i unplug the Subwoofer RCA cables and drive with just the 4 channel amp on so i can see if that cuts off and what not...and then vice versa or what are some suggestions from you guys?
You should be able to re-produce the problem right in your driveway.. just start wiggling wires around with it playing.. Pull the HU, play it, wiggle the wires.. anything? no? move back to the amp, wiggle the wires... Anything... ?

Have you checked ANY of the connections for tightness??
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Old 02-13-2010, 03:47 PM   #20
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I used to get that same problem in my old car. I think it turned out to be a problem with the negative ground, having a secure connection, make sure there is no RUST around your negative connection. Also double check the harness area for loose connections, especially the remote wire.
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Old 02-14-2010, 03:18 AM   #21
Speedster329
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Quote:
Originally Posted by Aaron'z 2.5RS View Post
You should be able to re-produce the problem right in your driveway.. just start wiggling wires around with it playing.. Pull the HU, play it, wiggle the wires.. anything? no? move back to the amp, wiggle the wires... Anything... ?

Have you checked ANY of the connections for tightness??
yupp this is exactly what i plan on doing and my dad recommended i do the same as well...soo hopefully when this weather gets nice im going to take the rear seats out...find a new spot for the ground and have some fun wiggling some wires and hope not to get zapped or anything lol....i will keep every one posted with what happens or if i need more help...thanks to every 1 who has shared opinions and tips with me so far!
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Old 02-14-2010, 02:20 PM   #22
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Quote:
Originally Posted by BBarnes1 View Post
I had similar problems In my last stereo build. Turned out to be bad rca connections. Narrowing down the cause can be frustrating good luck!!
yeah i had the same problem and i switched all my rca connections and it turned out after all that it was where i plug in my rca cables
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Old 02-14-2010, 09:11 PM   #23
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I would check all of your speaker wires at the speakers and the subs in the box make sure your voice coils aren't broke and RCAs if al the sound is going away its most likely a speak wire the wires could be grounding out or touching each other. but if the radio is shutting off it would be your keyed, constant, or ground wire. Same thing if the amp is shutting of in that case remote power or ground. Also always make sure your box and amp are secure.
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Old 02-15-2010, 11:30 AM   #24
Speedster329
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Quote:
Originally Posted by KyleRGAJ View Post
I would check all of your speaker wires at the speakers and the subs in the box make sure your voice coils aren't broke and RCAs if al the sound is going away its most likely a speak wire the wires could be grounding out or touching each other. but if the radio is shutting off it would be your keyed, constant, or ground wire. Same thing if the amp is shutting of in that case remote power or ground. Also always make sure your box and amp are secure.
the radio stays playing and keeps going until the sound cuts back on...im going to pull the head unit out today hopefully and the rear seats to mess with all the wires....i was thinking mabey its something with the Remote wires because both the SUB and 4 Channel amp cut off and then come back on the same time pretty much... im going to also check the RCA cables and see whats up with those...

Do You guys think i should play the music and then unplug the RCA cables just to the sub....and then pull them out from the 4 channel amp? or how should i go about testing each RCA cable/speaker wires?
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Old 02-15-2010, 05:51 PM   #25
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ALRIGHT!!! problem solved and had to be the most dumbest thing possible lol
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