Its a not a whine or a whirl, it's not popping. I've searched alot of different audio forums and everything troubleshoots for those types of noise. I've not seen anything close yet to what is going on with my system. I have an Alpine head unit with only sub out rca's plugged in. I've changed rca's 3 times due to this problem thinking I had bad rca's. When the deck shakes either due to a bumpy road or just rough engine idle sound come through the subs. Even if Im at a stand still listening to a song with no bass I can give it bass by tapping on the front of the deck. Everytime I tap a bass note hits. I'm at a loss, I'm thinking its something internal with the head unit. Any ideas or actual solutions would be great. Thanks
now i dont know if this is the solution to your problem (probably isnt) but ill throw it out here.
i used to have a mazda mx3... it had a system in it that a previous owner put in and they ran the ground and power wire side by side with them touching. the way this particular wiring was done caused a frequency to go to the speakers from the wires themselves. when you accelerate you would get a winnning noise and it pretty much worked like a microphone with the amp, and in turn the sub, playing sounds from driving (bumps, acceleration whining type frequency noise, etc)... again this probably isnt what your even talking about but this is what happened with that car.. so i just seperated the wires properly and it stopped.
my apologies if my explanations and descriptions were somewhat hard to interpret
paul eccles wrote:now i dont know if this is the solution to your problem (probably isnt) but ill throw it out here.
i used to have a mazda mx3... it had a system in it that a previous owner put in and they ran the ground and power wire side by side with them touching. the way this particular wiring was done caused a frequency to go to the speakers from the wires themselves. when you accelerate you would get a winnning noise and it pretty much worked like a microphone with the amp, and in turn the sub, playing sounds from driving (bumps, acceleration whining type frequency noise, etc)... again this probably isnt what your even talking about but this is what happened with that car.. so i just seperated the wires properly and it stopped.
my apologies if my explanations and descriptions were somewhat hard to interpret
Thanks for your input but like i said it's not a whine. There is no noise when I accelerate, there is nothing else going on but the sub hitting when the deck is tapped whether its myself doing it or the from the car shaking. My rca run opposite of power and remote. The deck was installed poorly so yes maybe there is something with the ground but so far from what I've read the symptom of that is a constant whine or distortion, where in my case everything is clean except when deck is tapped.
sndsgood wrote:if it only happens when u hit the cd player, i'd go with the cd player as being your problem. swap it out and see if the noise is still there. you said yourself the deck is poorly installed. id start there.
Yes my main thought was it being the deck. I did contact Alpine they said it could be an internal problem, loose connection inside or something. No longer on warranty so getting it fixed is almost the price of a new one. I say it was poorly installed because they never used an adapter just a hack job on my wires so a simple swap to another deck or even the original is not that simple. If I was going to go through the trouble it would be to permenatly install a new one. Was hoping not to have to because its only 3 years old and I found played better than others I tried. I've posted in other forums and I thought by now I would come across someone who's run into the same problem and would be a quick simple fix , still searching and I do appreciate everyones help
By another alpine deck. It should plug into what is there. you have a faulty ground to your RCA female on the deck.
Mark wrote:By another alpine deck. It should plug into what is there. you have a faulty ground to your RCA female on the deck.
Is that repairable, cost to much to fix to be worth it or I definetly need a new deck
dont bother buy a new HU. Like mark said if you buy another alpine it should just plug in no problem. You definitely need a new one
illdwes . wrote:dont bother buy a new HU. Like mark said if you buy another alpine it should just plug in no problem. You definitely need a new one
I narrowed it down to being only the red rca on the HU. I did more research and the new Alpines are wired different now and with a noise filter. Im sure it's not much to bypass but if the original hook up that comes with the new deck isn't used it voids warranty. Also for a repair around my area if you send it in and it's under $170 they don't contact you and fix it anyway so basically they charge you no matter what and tell you whatever they want. So it definetly looks like a new deck is my only option. Thanks for all suggestions and out of 3 other forums this is the only one I've gotten responses from. I guess it helps driving a J body
