Just bought a Beam Gen 2. Sound quality is incredible but at high volume (> 55%) and bass-heavy tracks there’s a distinct rattle/buzz coming from inside the unit. It’s definitely the Beam itself because it continues if you pick it up. Stops if it’s rotated onto its back.
My guess would be that it’s a ribbon cable that connects the touch panel on the top, but I’m not sure if this is a design issue (at which point swapping it out won’t help) or a fault with mine.