The BRV-XXL/2 Rugged Portable Speaker Boasts An Integrated Subwoofer Braven's BRV-XXL/2 portable speaker is “20% louder and 40% more powerful” than its predecessor. The hefty (17.4 pound) speaker features a subwoofer, 2 passive radiators, and 4 full-range drivers. 18-hour battery and IPX5 waterproof rating make it a formidable outdoor party speaker.