The JBL Xtreme 4 is a powerful portable Bluetooth speaker designed for outdoor use, delivering JBL Pro Sound with strong bass performance and high maximum volume. It is equipped with two woofers and two tweeters, supported by dual passive radiators that enhance low-frequency output and create deeper, more impactful bass. The speaker supports a frequency response range of approximately 44 Hz to 20 kHz, providing a balanced mix of bass, mids, and treble suitable for both indoor and outdoor listening.

It features Bluetooth 5.3 connectivity, multi-speaker pairing via Auracast, and support for the JBL Portable app, which allows EQ adjustment and sound customization. The Xtreme 4 is built with an IP67 rating, making it fully dustproof and waterproof, so it can be used at the beach, poolside, or in heavy outdoor conditions without damage.

Battery life is one of its key strengths, offering up to 24 hours of playback, with an additional “Playtime Boost” mode that can extend usage further depending on volume levels and usage conditions.