JBL PartyBox 310 vs PartyBox 520

The JBL PartyBox 520 is a better speaker than the JBL PartyBox 310. The PartyBox 520's sound is more balanced, so your audio sounds more accurate, and the soundstage is slightly better with a higher max output volume. Plus, you can connect to USB-C audio, which is handy. Its telescopic handle makes it easier to move around for people of different heights. That said, the PartyBox 310 is considerably lighter with a bit longer battery life. It shares many similar features, like two mic inputs for karaoke, and EQ in the app at a lower price point.