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04-14-2024, 01:15 PM | #1 |
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Wiring for aftermarket Subwoofer
TDLR: Does anyone know or know how I can find out what colors the subwoofer wires for a 2022 G12 745e would be?
I’m trying to connect an aftermarket subwoofer so I’ve connected to a set of wires and the subs are working but I’m not certain they are the wires from the factory subwoofers. If anyone isn’t familiar, it would be ideal to connect to the factory subwoofer wires as opposed to mid or high range speakers because of the frequency differences. I installed this a few months ago so it’s hard to remember what exactly I did. However, I had subwoofers in my g30 and I just tried to replicate the install. So believe I connected to the same colored wires as the g30, but I’m noticing now months after, that the aftermarket subwoofer sounds a little off. When I did the install, I remember googling speaker wiring diagrams for both the G30 and G12, but I had a tough time. I think the most confusing thing was my G30 aftermarket subwoofers were installed by a professional, but from one of the diagrams I saw online the colored wires they connected to were not the same color as the subwoofer wires in the googled speaker wiring diagrams. I even tried to look up how to get access to the G12 subwoofers to look at the wires but it involved removing the front seats so I just did not want to do that. Anyways, if anyone knows or knows how I can find out what color the factory subwoofer wires for a 2022 G12 745e, I would greatly appreciate it!! |
07-30-2024, 07:51 AM | #6 |
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Both HK and B&W use same coloring for subwoofer wires. Pay attention to pin out configuration as well because same color wires are used for other speakers as well. Another easy way to distinguish from other wires is that sub wires are three times thicker than mid or tweeter wires.
Last edited by Raimo5; 07-30-2024 at 08:02 AM.. |
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740iGuy6.00 |
07-30-2024, 10:16 AM | #7 |
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Would be interesting to know how you did this...
It is my understanding that the bass speakers (as BMW calls them) - are a (size?) woofer located under each of the two front seats. Just interested to know what size subwoofer you used, where you placed it, and how you wired it... Thanks! |
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08-01-2024, 04:58 PM | #8 | |
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740iGuy6.00 |
08-06-2024, 01:36 PM | #9 |
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So does anyone know if the Bowers & Wilkins system (not sure if the Harmon Kardon system is the same) - uses a separate amp to run just the two under seat 8" subwoofers...?
And/or is there one set of connections on the amp - for both subwoofers - or does each subwoofer have its own dedicated connection to the amp...? |
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08-06-2024, 05:54 PM | #10 | |
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All speakers are run from one amplifier. Both bass speakers have their own, dedicated channel coming from amplifier. Pin out is displayed on diagram and is same for HK and B&W. |
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740iGuy6.00 |
08-06-2024, 06:18 PM | #11 |
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What has me confused is the diagram from Bowers & Wilkins showing two components in the trunk on the drivers side...
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08-19-2024, 11:27 AM | #13 | |
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I dont even know what impedance are the ones I have, I spent hours searching and some forums say HK are 8 ohms but others say theirs are 4 Ohms. I am also curios if I can exchange the HK amplifier for a B&W and get improved sound without major overhaul. Are all the connections the same to run it with the existing HK speakers? Last, I saw on ebay individual B&W amp for the G11-g12 (second hand it came out of one of those vehicles) that looks like a black box selling for about 1200-1300 but then other ads in ebay that sell the entire speaker + amp package (second hand) and the amp they took out of the vehicle with the speakers does not look nothing like the single B&W they are selling. Any help with answer is greatly appreciated. |
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08-19-2024, 06:17 PM | #14 |
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All speaker sizes should be same as there are no different option codes for mounting hardware. No idea about impedance.
You can't just swap in B&W amplifier even if terminal and channel configuration allow it. Frequency response is obviously different, and front door speakers are driven via diplexers. There is a lot of fake, made in China B&W crap circulating around. Real one is a black rectangle with Bowers & Wilkins written on it. Not that counterfeit might not look like one either. |
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08-19-2024, 11:21 PM | #15 | |
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theshow a picture of the donor car that is like mine a 750i |
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08-19-2024, 11:24 PM | #16 |
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This is what a full set second hand looks like and the amp here supposedly a B&W is not a black square box... I am confused. So if I buy this entire set I still have to re-wire the entire car? not plug and play with current wiring?
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