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      12-28-2020, 03:10 PM   #82
argento
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Drives: 2013 X5M
Join Date: Mar 2012
Location: Houston

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Quote:
Originally Posted by RL18 View Post
That crossover is interesting. I'm not sure what that three pin wire is for. Maybe there's another speaker in series with the front door midranges? I know my front door mids were parallel with my underseat woofers, so I'm wondering if you have another speaker wired in with the midranges and tweeters. I wish bmw was better about posting audio specs like you would find on aftermarket audio gear.
This is what I believe is going on in the front doors. A HPF and an LPF in parallel. The grey ovals are soldering points on the diplexer. Now I'm just working on the B&W midrange schematic...

Updated 1/2; XO points; Colors are indicative of oem wires: blue = yellow/blue, yellow=solid yellow, black=black/yellow, red = power, black = ground;
Name:  Assumed Wiring Diagram_S752A Front Doors.PNG
Views: 1166
Size:  480.6 KB

From the12volt:

Name:  12dB HPF.PNG
Views: 1235
Size:  42.3 KB Name:  12dB LPF.PNG
Views: 1243
Size:  40.7 KB

Lmk if anyone finds any errors...
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Last edited by argento; 01-02-2021 at 10:01 AM..
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