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Factory amp'd systems don't always use the > (archive)

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Posted by LUNI2NZ on May 14, 2001 at 09:23:49:

In Reply to: Stereo/Common Ground Question posted by M3 Repete on May 14, 2001 at 09:09:46:


this weekend, i pulled out my bandpass sub enclosure and nakamachi amp and xover and decieded to add some bass to my M3's stereo.

i have standard amp with a sony ES head unit.

so i go to unofficialbmw.com and get the wiring diagram for a 325 stereo (i assumed it was the same, may be wrong here).

so far, so good.

i tap into the line level feeds into the amp with inline, splice on connecters, which in turn feed rca plugs to the xover.

i hook the whole mess up. i check my connections 3 times to make sure i've got it right. (i have done this many times, in about 6 different vehicles, always with success).

No go. no sound. nothing.

I disconnect the rca plugs, pull the fuse from the amp and it works as before, in other words, passable, but no bass.

what am i doing wrong? thanks...

btw, i checked the archives already.....


same signal to power the amp. Does your amp have speaker level inputs? If so, try using them instead. Patch into the outputs from the factory amp. It's also possible that you connected to the wrong wires. My Bentley manual was not accurate on color codes. If I remember, the inputs from the deck are in the plug closest to the back seat. Jay


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