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Anybody do any system installs on a 545i?


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My good friend just bought a 2005 bmw 545i. we are trying to install his 3 12s and amp. power and ground connections were very simple with the battery in the trunk, but getting signal and ignition seems to be a problem. id like to keep all the wires in the trunk. i know the factory amp is on the drivers side in the trunk and have found a thread that lists what wires left and right are. but it seems like the signal fades in and out. so my question is, does anyone know what are the correct wires to get a sub signal from? and is there ignition in the trunk? and if so where? i have tried tagging signal with a loc from the 4" speaker in the rear deck only to find out that that channel is high passed and has little to no low freq passing through that channel. any suggestions or PICTURES would be greatly appreciated.

Thanks,

Brandon

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ok so ive done a ton of research and found out where the ignition wire is...

picture of ignition wire

but i still need to figure out proper sub signal if anyone could help me out!

OH, and it does have the logic 7 system if that makes a difference

Edited by soundsystemaniac
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does it have a factory subwoofer?

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there are 4 full range outputs behind the radio hi level

these 4 outputs drive the front doors and rear door mids

the center, factory subs under the front seats, and rear deck speakers are all ran off the factory amp.

you need to put a hi-low adapter behind the radio up front.

all other signals are x-over

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does it have a factory subwoofer?

yes, they are under the front seats

Should have 5 1/4 or 6.5 bass in the rear deck no? High low converter to that?

just some 4 inch speakers that are high passed in the rear deck.

there are 4 full range outputs behind the radio hi level

these 4 outputs drive the front doors and rear door mids

the center, factory subs under the front seats, and rear deck speakers are all ran off the factory amp.

you need to put a hi-low adapter behind the radio up front.

all other signals are x-over

thanks ray, happen to know what colors i should tag off when i pull the radio??

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