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      03-01-2013, 05:14 AM   #1
Drives: BMW E90
Join Date: Jun 2011

Posts: 99
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replacing oem base speakers with aftermarket

hi guys. .

i have a e90 bmw sedan with the base system (front doors, under seats and rear parcel shelf)

so I bought a pair of polk audio dxi 400's (4inch) my question is how do I wire it up. im using the exsisting speaker wire as I am not doing an amp just a straight swap. . the oem speaker wire is split into two wires. blue/black and blue/brown. . my question is which one is the positive and which one is the negative. .

also is it best to solder the wire to the new speaker as I cant use the standard speaker wire connector??
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