Handlebar speaker bags – take your tunes with you! Fits the UE Boom 3 but unfortunately turned out to be a very tight fit for the Megaboom, so it's on sale at $65 each.
Without a boom bag, you could put speakers in a bottle cage but the sound is much lower down and the wind carries the sound away.
Mount it like a stem bag or use the daisy chain to hang it across the handlebars.
Materials: Ultra200 top & X-pac Liteskin, non-stretch mesh.
Size: 85mm x 250mm maximum rolled height