Most Bluetooth speakers are built for a room. The JBL PartyBox Stage 320 is built for a tennis court, and Prime Day just made it the easiest it has ever been to own one. Amazon has it at $449, against its usual $599, which is an all-time low for this 240W portable party speaker with 18-hour battery life, a built-in lightshow, dual mic and guitar inputs, telescopic handle, and sturdy wheels. No Prime membership required.
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240 watts and a lightshow that syncs to the beat
The PartyBox Stage 320 runs two 6.5-inch woofers for deep, precise bass at full volume alongside a pair of 25mm dome tweeters for clean high-frequency detail. JBL rates the combined output at 240W, which is enough to fill an outdoor space the size of a tennis court with music that doesn’t compress or distort when pushed to the top of its range. This is not a speaker you position on a table and stand near: it’s a speaker you place at one end of a backyard, a park, or a venue and let do the work across the entire space.
The built-in lightshow adds starry lights, light trails, and strobe effects that sync automatically to whatever is playing, which transforms the PartyBox Stage 320 from a speaker into a complete audio and visual setup without any additional hardware. The effect is substantial enough that the lightshow alone changes the atmosphere of a space after dark, and it requires nothing more than plugging the speaker in and playing music.
