My M1 MacBook Air speakers have strong distortion/rattling, most noticeable when listening to piano music. The distortion is present even at 25% volume.
I tried buying a used set of speakers on eBay, but they had the exact same distortion. My best guess is that the used speakers I bought on eBay were also damaged, but is it possible that my audio board is the problem? There is no distortion when using headphones, so it seems unlikely that the audio board is at fault, but I want to be sure that it's good before I buy another set of speakers.