Soundcore Boost rattling distortion noise fix

Update May 2024: For me, it was sufficient to just cut off the cloth at the center of the back (opposite side of the Anker logo), just in front of the passive resonator. I’ve used a frequency generator to generate a sine wave at about 75Hz to get the rattling noise, then press with your finger on the cloth until you find the spot where it stops. Photo:

The nice thing is, the front still looks clean! :slight_smile: