Speaker Wiring - Adding a Subwoofer

steelblue48310

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Buick Ownership
2019 Envision and Encore
Hello... New member here. I'm looking for the speaker Wiring diagram (or at least a color code) so I can add an aftermarket subwoofer. I don't have the Bose system... Just the standard radio. I found an under-seat subwoofer that will fit nicely under the larger rear seat, and it will need to connect to the rear speakers since the head-end unit doesn't have line-level outputs.

Thanks!
 
Well... After several months I finally got the subwoofer installed. Part of the delay was due to the fact that the car was at the dealership for weeks and weeks for a problem that is best suited for another thread.

Anyway, if anyone is looking for the colors of the rear speaker wiring, I can share this:

Left rear: Green / Green w/Black stripe
Right rear: White / Blue w/grey stripe

They are each twisted in pairs and a slightly heavier gauge than the other wires in the same harness. I was able to access each side by removing the kick plate at the rear floorboards.

The sub I bought was a self powered unit with both RCA and speaker-level inputs, which is why I needed to find the actual speaker connections.

Good luck with your project!
 
Well... After several months I finally got the subwoofer installed. Part of the delay was due to the fact that the car was at the dealership for weeks and weeks for a problem that is best suited for another thread.

Anyway, if anyone is looking for the colors of the rear speaker wiring, I can share this:

Left rear: Green / Green w/Black stripe
Right rear: White / Blue w/grey stripe

They are each twisted in pairs and a slightly heavier gauge than the other wires in the same harness. I was able to access each side by removing the kick plate at the rear floorboards.

The sub I bought was a self powered unit with both RCA and speaker-level inputs, which is why I needed to find the actual speaker connections.

Good luck with your project!
Update #2... Now I have to figure out where all the Active Noise Cancellation mics are. I found the one on the rear ceiling, but there's another somewhere... I disconnected the rear one but ANC system is still causing feedback in the Sub. Anyone know where the other ones are?
 
Update #2... Now I have to figure out where all the Active Noise Cancellation mics are. I found the one on the rear ceiling, but there's another somewhere... I disconnected the rear one but ANC system is still causing feedback in the Sub. Anyone know where the other ones are?
I figured it out... There's 2 more mics; one on each side in the grab handles above the front door. You can see the little holes in each. I ended up cutting the wires to the mic because I didn't want to pull down the whole headliner to unplug them. (Didn't need them anymore)

Now the subwoofer works great!
 
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Just wanted to pop in and say thanks for the info. Despite nobody helping you, you continuing to come back and update helped me. Cheers!
 
I figured it out... There's 2 more mics; one on each side in the grab handles above the front door. You can see the little holes in each. I ended up cutting the wires to the mic because I didn't want to pull down the whole headliner to unplug them. (Didn't need them anymore)

Now the subwoofer works great!

3 years later, I'd like to ask, did the feedback occur continuously or just for maybe 10 seconds after you start the car. I had a powered sub in my Acura SUV with ANC and the feedback would occur for only about 10 seconds then it went away so i never bothered with the mics or disabling ANC. I would like to put the same sub in the Envision....
 
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