when my trunk closes, a wierd constant bass?

[Lsasqwach]

thats only way to describe it. it will beat fine when i have my trunk open, but when it closes, there will be a constant noise, like a beat, or feedback. i have no rca's in my cd player (im going to upgrade) so i had to splice in a rca conversion (more technical name slips my mind). im running a US Acoustics 2080 amp, and a 12" pioneer. it seems to be fixed when i turned the gain down, but i just want to know if i can fix it and turn the gain back up, or if i have to leave it? thanks

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[squeak9798 5,000+ posts]

it seems to be fixed when i turned the gain down, but i just want to know if i can fix it and turn the gain back up, or if i have to leave it?

First, set your gain properly by following the gain setting tutorial in the amplifier section.

 

[mustangowner 10+ year member]

Also try facing the sub a different way...if its facing the back of the car, turn it so its facing the front of the car and vise versa.

 

[Strecker25 10+ year member]

where is your amp grounded to?

 

[Lsasqwach]

right now its facing the back, so ill try changing that, but my ground is kinda iffy. there was a system in the car before i got it, so i used that ground. ( the system sounded decent too) its on the roof of my trunk, before the lid opens and after the rear speakers.

 

[negativezeroz 5,000+ posts]

wat car?

 

[Strecker25 10+ year member]

right now its facing the back, so ill try changing that, but my ground is kinda iffy. there was a system in the car before i got it, so i used that ground. ( the system sounded decent too) its on the roof of my trunk, before the lid opens and after the rear speakers.

reground that beast, maybe when you close the trunk the ground gets a bad connection on account of moving connection to the body.

edit\\ just re read and sounds like u mean under the rear deck, but reground it anywas, thats not really a great spot to begin with

 

[Lsasqwach]

i think its a 93 taurus, its my buddys. yeah, ill reground it for him, ill probably just run it to the battery.

 

[lebomb 10+ year member]

thats only way to describe it. it will beat fine when i have my trunk open, but when it closes, there will be a constant noise, like a beat, or feedback. i have no rca's in my cd player (im going to upgrade) so i had to splice in a rca conversion (more technical name slips my mind). im running a US Acoustics 2080 amp, and a 12" pioneer. it seems to be fixed when i turned the gain down, but i just want to know if i can fix it and turn the gain back up, or if i have to leave it? thanks

You can only use so much power with an rca conversion. The same thing happened to me years ago in an install. I had 300watts on an Orion XTR and the only way I lost the constant bass noise was to back off the gains or upgrade my headunit.....which is what I did. Problem solved, noise went away and I was able to set my gain where it needed to be. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[Lsasqwach]

Awesome, Thanks a lot, hopefully that will be it, I am going to reground it hopefully straight to my battery.

 

[Decipha 10+ year member]

I use to have a Pioneer free air series 12 powered by my mtx 240 and whenever you slammed the door shut, the bass went boom, it was caused by either my line out converter or my factory head unit, im not sure which one since i got rid of them both at the same time.