I have a USB with music file but my subwoofer will not play. Aquatic AV July 16, 2020 20:01 Updated Make sure that your music file is in MP3 format and the USB drive is no bigger than 32GB. If not, the unit will not read. Related articles What kind of outputs do your subwoofers have? MP5 Stereo for Harley (AQ-MP-5BT-H) - Owners Manual SWA6+ Combined Stereo + Subwoofer - Specification + Datasheet Can I use my SWA6+ Combined Stereo and Subwoofer by itself? Do I need more speakers? My BLUECUBE6+ Hide-Away Stereo LED light is not turning on. What could be the problem? Comments 0 comments Article is closed for comments.