JBL Boombox 4 Waterproof portable Bluetooth speaker
sku# 109BMBOX4B
More BOOM in the Boombox Leave it to JBL to somehow make the Boombox 4 lighter yet more powerful than its predecessor. JBL redesigned this speaker with larger woofers and an extra passive radiator, so it thumps extra hard. It sits in the sweet spot between their lineup of more compact portables and their jumbo PartyBox speakers. The Boombox 4 uses AI in the digital signal processing - it analyzes incoming signals and makes adjustments on the fly to keep the sound clean, without distorting or getting too boomy.