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Bose QC35 II left earcup jumper wire pinout
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* B+ : Red(Thick)
* T : Black/Copper
* B- : Black(Thick)
* LFB- : Green
* R : Black/Red
* LFB+ : White
* LDRV+ : Red/Teal
* L : Green/Copper
* LDRV- : Red/Copper
* LFF+ : Purple
* Det : Black/Teal
* LFF- : Teal
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@foriequal0
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foriequal0 commented Apr 26, 2024

Replacing Bose QC35 I/II headband requires desoldering some jumper wires.
The pinout is the same for I and II. QC35 I has some unpopulated pads (GND, Shield) while II doesn't have those pads.

There are some videos about replacing Bose QC35 headband.
https://www.youtube.com/watch?v=CP9JQE2Erj0
https://www.youtube.com/watch?v=7tVYqWIYDLs

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