How to Replace the Left and Right Speaker Housings on the Bose QuietComfort (QC) Ultra Headphones (DIY Repair Guide)
Do your Bose QuietComfort (QC) Ultra wireless headphones produce crackling, buzzing, or rattling sounds at medium volume? Is one earcup noticeably quieter than the other, or completely silent even though the touch controls still work? If you’re also noticing reduced volume or complete sound loss on one side, these are strong indicators that the speaker driver may be damaged and needs to be replaced.