JBL Partybox 520

Sound and Performance SpecsPower Output: 400 W RMS via dual 7.5-inch woofers and dual 1-inch dome tweeters (40 Hz – 20 kHz).AI Sound Boost: Real-time audio tracking to minimize distortion at high volume.Battery Life: Up to 15 hours of playtime with a swappable battery design; a 10-minute fast charge yields about 2 hours of extra playbac