The JBL PartyBox series of audio systems is the brand's flagship line in the party speakers category. They are aimed at a wide audience — from those wanting to take a compact speaker to a pool party, to event organizers needing to fill an open space with sound. All models in the series share three main features: powerful sound with JBL's signature Pro Sound, music-synchronized lighting (lighting effects), and the ability to connect a microphone and guitar for live performances and karaoke. Most models come with IPX4 splash protection. Starting in 2024, the entire series has been equipped with AI Sound Boost technology — an algorithm that analyzes the audio signal and optimizes the output power for cleaner sound without distortion, as well as supports Auracast for synchronizing multiple speakers into a single system without any limit on quantity.

The current model range is clearly divided according to usage scenarios: from compact portable speakers to massive systems capable of soundtracking an entire stadium. For example, the smallest speaker in the line — Encore, delivers 100W of sound despite its size. The medium-sized "workhorses" are a versatile solution for country houses, pools, or large terraces. Notable examples of this segment include the Stage 320 (240W) with a pair of 6.5'' woofers and 18 hours of operation, as well as the PartyBox 520 (400W) — the most powerful battery-powered model in the series: two 7.5'' woofers, fast charging (10 minutes provides 2 hours of operation), XLR inputs for professional microphones, and up to 15 hours of autonomy.

The flagship and most powerful audio system in the current lineup is the JBL PartyBox Ultimate (1100W). In addition to Bluetooth, it supports Wi-Fi and Dolby Atmos, ensuring sound clarity even at maximum volume. It features the JBL PartyPad on the top panel for DJ effects. This is the only model in the series that operates exclusively on mains power without a battery.