The JBL Go 4 is a ultra-compact, waterproof Bluetooth speaker that weighs just 192g (6.8 oz) and fits in a pocket or backpack. It features a single driver delivering punchy bass and clear mids, with IP67 waterproof and dustproof certification for beach, pool, and trail use.

Key specs: 7-hour battery life per charge, Bluetooth 5.3 with ~10m range, mono playback, no aux input or microphone. Charges via USB-C in ~2.5 hours.

Sound signature: JBL's signature is warm and bass-forward; the Go 4 prioritizes fun, portable sound over studio accuracy. It handles voice and pop well; at max volume (~83 dB) there's some bass bloom but it remains listenable.

Build & durability: Rubberized, drop-resistant casing; proven track record across JBL's Go line. Water seal is reliable when port caps are sealed.

Who it's for: Budget-conscious buyers seeking a rugged, pocketable speaker for casual listening, travel, showers, and outdoor activities. Not for critical listening or high-volume gatherings.