SUBWOOFER
11-05-2009, 12:08 PM
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I was wondering if anyone could help me as i have installed an aftermarket Sub and Amp i just realisedb that everytime i switch the car on and off the Sub in the Boot/Trunk thumps...is this normal or do i need to do something for it to go away??? 
11-05-2009, 12:27 PM
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My Ride: 2008 550I LOADED, all options except HUD and NV
Definitely NOT normal. I don't have that problem with my sub and amp. Check to make sure they connected the remote shut-off wire correctly, they could short out quite a bit of stuff in our cars. Did the shop you went to guarantee their work? If so, go back and make them check it, keep your paperwork.
11-05-2009, 12:51 PM
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My Ride: 05 530i
87 325is
85 VW GTI
Sounds like you might have your gain set way to high and the sudden change in voltage is spiking your amp (disclaimer I am not a professional)
11-05-2009, 12:53 PM
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My Ride: 2008 550I LOADED, all options except HUD and NV
Originally Posted by einstein57' post='1048236' date='Nov 5 2009, 01:51 PM
Sounds like you might have your gain set way to high and the sudden change in voltage is spiking your amp (disclaimer I am not a professional)
I am no professional either, but it doesn't matter if I have my bass control set all the way down or up it never makes a peep until the radio is turned on.
11-05-2009, 04:10 PM
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Thanks guys will get it checked out and give a feedback on what it might be...as it wasnt doing that at first when i first connected the sub and amp but after i disconnected the negative wire from the battery yesterday to put on m5 side mirrors i started getting this thump noise...
11-05-2009, 04:29 PM
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My Ride: 04 545i sport, stick, L7, sat, nav. Charcoal/ runflat/ cdv delete.
Suede headliner/ trunk, 3 way front speakers, four 8" subs in rear shelf, ACM, iPod dock in ash tray using gateway 500 with MP3 text and video on screen, MRTM aluminum pedals/ door pins, 10 farad cap, sound processor, line conditioner, 2 amps ( 4x100 and 2x200)
Originally Posted by delwarulislam' post='1048195' date='Nov 5 2009, 01:08 PM
I was wondering if anyone could help me as i have installed an aftermarket Sub and Amp i just realisedb that everytime i switch the car on and off the Sub in the Boot/Trunk thumps...is this normal or do i need to do something for it to go away???
Well anyway if your using rca cables try this, pull out the rca cables and see if you still get a turn on/off pop. If your pop goes away you just ruled out the sub amp as the cause.
11-05-2009, 05:01 PM
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Originally Posted by methodsound' post='1048436' date='Nov 5 2009, 08:29 PM
Are you using rca cables to the amp or the high level ( speaker wire ) inputs on your amp? A picture of the amp and the connection you made to the speaker wires and turn on wire of the car would help too.
Well anyway if your using rca cables try this, pull out the rca cables and see if you still get a turn on/off pop. If your pop goes away you just ruled out the sub amp as the cause.
Well anyway if your using rca cables try this, pull out the rca cables and see if you still get a turn on/off pop. If your pop goes away you just ruled out the sub amp as the cause.
11-05-2009, 05:03 PM
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Would it matter if the ground wire from the amp was hooked up on the batteries negative pole?? as i have my ground wire from the amp hooked up to the negative bolt on the actual battery itself and not on any metal surface or bolts in the trunk (i was being lazy), im thinking that might be the cause of the thump???
11-05-2009, 08:41 PM
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My Ride: 04 545i sport, stick, L7, sat, nav. Charcoal/ runflat/ cdv delete.
Suede headliner/ trunk, 3 way front speakers, four 8" subs in rear shelf, ACM, iPod dock in ash tray using gateway 500 with MP3 text and video on screen, MRTM aluminum pedals/ door pins, 10 farad cap, sound processor, line conditioner, 2 amps ( 4x100 and 2x200)
There is a current sensor built into the negative battery terminal. If you connect the ground strait to the negative terminal you are bypassing the current sensor which will cause charging issues due to efficient dynamics. You should fix this first.
By the way, using the cigaret lighter for your ignition ( turn on ) signal is fine.
Second, I am not sure if you did the test I was suggesting that you should do or not... what I meant was to unplug the rca cables going to your amp, and turn the car off and on to check if the turn off pop is still there (with the rca cables unplugged).
By the way, using the cigaret lighter for your ignition ( turn on ) signal is fine.
Second, I am not sure if you did the test I was suggesting that you should do or not... what I meant was to unplug the rca cables going to your amp, and turn the car off and on to check if the turn off pop is still there (with the rca cables unplugged).