okay i decided to add my old sub from my jetta to my scion i still got the stock head unit in also. okay the thing is when i turn off the vehicle it gives a loud bang or thumb noise from the sub. the installer said its cause of the stock head unit does anyone know if thats true or is the mechanic bull____ting

 

he's bull____ttiin, i had the stock radio for a while and that never happened to me

 

my old subs used to do that. When Id turn the car on the subs would make a little thump. My new subs dont do that anymore. Im guessing it must be something Amp-remote orientated.

 

so wat should i do?

 

go to a stereo shop.. pick up a Pioneer Avic-D3 and have a blast.

 

since u are running a stock headunit u have to be running a hi/lo convertor. it basically uses the signal from ur speakers and converts them into RCA outputs. most convertors have signal adjustment ***** on them. try to turn the signal down a bit and see what that does. I did an install once and the same problem was there this, after adjusting the signals everything was fine. even now I am running a stock deck with subs and have no problems at all.

 

i dont want to change head unit cause i like using my ipod jack in the armrest. unless there is a head unit that i can use to make the ipod jack in arm rest work

 

Get an amp that has silent turn on and you wont have that issue.

 

you might want to go back and double check and make sure that all your wires are ran right. if you don't have the pos and neg hooked up right then you can run into problems with that thump. If there fine it could be your ground wire not properly grounded.

 

well the avic d3 has the ipod hookup that lets you use the hookup in the armrest.

 

well you have to get the adapter.. but it can be done.

 

instead of suggesting he go out and spend a ton of money, just becuase you think it's cool, how about you actually try to help him solve the problem he has.

if you've got the ipod hookup, it means you have the upgraded factory HU. so there is no LOC (line output converter).

To the OP, sounds like one of your grounds is bad. Go back and check them.

 

how's that spending a ton of money? you can easily find one for cheap either here or on ebay. it takes care of his problem.. and i wouldn't be recomending it if i didn't know from personal experience.

 

it pops cause of your amp is turned up too high. atleast there is no distortion when you have the desired volume maxed, everything is ok. do not replace or so anything, it works fine. you need to adjust your amp down alittle more.

best thing to do is turn your amp down to lowest and have the desired volume on your head unit you would like to have at max, slowly turn up your amp till a distortion occurs, when you hit the distortion just bring the amp alittle down under distortion point and your good to go..


DISTORTION includes CLAPPING noise on the sub or MUDDY noises! get someone knows alot about speakers to actually hear out the distortion. you might get confused between the music and distortion.