JBL PartyBox 520 — Black, Single

The JBL PartyBox 520 is a battery-powered party speaker finished in black, with a telescopic handle and wide wheels for transport. JBL rates its amplifier output at 400 W RMS under IEC 60268 and specifies two woofers and two dome tweeters. AI Sound Boost processes the incoming signal to manage acoustic output, while the JBL PartyBox app provides equalisation and light-show controls. Bluetooth and USB-C audio allow connection to suitable music sources, with two XLR inputs supporting compatible microphones, instruments or a DJ console. JBL advertises up to 15 hours of playback, depending on volume and audio content. The replaceable battery supports an optional spare, sold separately. Auracast can connect compatible speakers, but this is a single-speaker listing. IPX4 means splash resistance, not submersion protection. A mains power cord is supplied; microphones, instruments, a DJ console and an additional battery are not included. USB-C audio support must not be confused with unrestricted USB file playback in the UK, where the spec sheet marks listed file formats unavailable for the EMEA region.