JBL PartyBox 720 review: The loudest battery-powered JBL speaker yet

The JBL PartyBox 720 sits at the top of JBL’s battery-powered party speaker lineup, towering over both the PartyBox Stage 320 and the PartyBox 520. It packs a massive 800W of output, dual 9-inch woofers, swappable battery packs, and a full-panel light show that looks like it belongs at an outdoor festival. There’s absolutely nothing subtle about it, so at nearly 70 lbs, is the PartyBox 720 truly the ultimate party starter? Let’s roll it out and crank up some tunes in this JBL PartyBox 720 review.

What I like about the JBL PartyBox 720

The JBL PartyBox 720 is a head-turner, both for its size and its light show. It’s an absolutely massive speaker at nearly 70 lbs, but the integrated handle and wide wheels make it easy enough to move around, even without the telescopic handle you get on the 520. The build feels sturdy, with a thick plastic enclosure, an IPX4 splash-resistant rating, and a full front grille that shows off the 720’s animated, beat-synced light show. It’s the kind of speaker that immediately stands out in a space—not just because of its size, but because it’s clearly designed to be a key part of the party vibes rather than blend into the background and be forgotten about.

The control layout on the JBL PartyBox 720 should feel familiar if you have used any recent PartyBox speaker. The top panel offers physical buttons for power, Bluetooth, Auracast, and Bass Boost, along with dedicated knobs for volume and microphone levels if you plan to run karaoke. You also get quick access to light show controls, so you can switch effects or turn them off without reaching for your phone.

The PartyBox 720 also gives you plenty of ways to plug in, which is exactly what you want from a speaker built for big gatherings and events. Like the 520, you get dual XLR–1/4-inch combo inputs around the back, so connecting microphones, a small mixer, or a DJ controller is straightforward. There is also a 3.5mm aux port, and the single USB-C port can handle digital audio, including lossless playback. If you prefer to stay wireless, the speaker uses Bluetooth 5.4 with support for both the SBC and AAC codecs, and Auracast support makes it easy to link the 720 with other JBL speakers, from the Stage 320 to the Xtreme 4.

One of the PartyBox 720’s biggest claims to fame is that it’s the largest speaker in JBL’s lineup that can run on battery power. It uses two swappable JBL Battery 600 packs. You can always run it on AC power, and I recommend doing that whenever you have access to an outlet since it keeps the batteries charging and lets the speaker operate at its full 800 watts of output. When you’re off-grid, the swappable design means you don’t have to stop the music once the batteries run out. You can just drop in a fresh pair and keep things going. A speaker of this size running on battery power at all is impressive.

Regarding app support, the JBL PartyBox app brings plenty of control and customization to the PartyBox 720, and it’s worth installing if you want to get the most out of the speaker. You can customize the full light show with different colors and animation styles, adjust the sound with a 7-band EQ including the option to choose between the Deep and Punchy bass modes, and tweak microphone settings if you’re hosting karaoke. The app also handles speaker linking through Auracast with a visual interface that makes it easy to connect the 720 with other compatible JBL speakers.

When it comes to performance, the PartyBox 720 gets extremely loud, with more than enough output to fill a large indoor venue or a sizeable backyard gathering. I’m also impressed with its ability to maintain bass strength and clarity at higher volumes, especially when using the Deep Bass Boost setting. Indoors, the Deep mode delivers the kind of bass response you can physically feel, so watch your hearing. Pop hits like “Toxic” by Britney Spears produce low-frequency energy that can genuinely shake walls.

The Deep setting enhances bass strength while slightly reducing midrange strength, which gives the 720 a more club-style balance. If you want to get the dance floor moving, it’s the setting to use. It does a great job of emphasizing the bass depth partygoers crave without masking vocals or key instruments. Britney’s voice stays intelligible, and elements like the reverberated, twangy guitar maintain good presence and clarity, even with the stronger low end.

Switching genres, head bobbing to “Back in Black” by AC/DC has never been easier. The 720 maintains a consistent low-end pulse from the kick drum and bass guitar in Deep mode, while the drummer’s stick attack on the hi-hats remains easy to distinguish. That said, rock tracks can also benefit from the Punchy setting. Its additional low-midrange strength helps push the snare drum forward in the mix, but you do lose some of that wall-shaking low-end performance. It’s worth experimenting with both modes, depending on what you’re listening to; however, in my experience, most people tend to prefer the Deep setting.

If neither preset hits your preference, the 7-band EQ gives you plenty of room to fine-tune the overall sound. No matter how you shape it, the PartyBox 720 delivers a proper party sound with an eye-catching light show to match.

What I don’t like about the JBL PartyBox 720

At 68 lbs, the PartyBox 720 is obviously a handful. It’s easy enough to roll around on flat ground by yourself, but lifting it into a trunk or carrying it up stairs is absolutely a two-person job. If you need a PartyBox but expect to move it around solo, you might save your back by choosing the more portable PartyBox 520 instead.

Beyond that, there isn’t much to criticize. The 720 isn’t designed to be compact, and its sheer output, dual-swappable batteries, and full-panel light show all come with the territory. If you want this level of performance, you’re naturally committing to something this large and heavy. As Uncle Ben once said, “With great power comes great responsibility.”

Should you buy the JBL PartyBox 720?

It’s a bit of an investment, but you should buy the JBL PartyBox 720 if you want one of the loudest and most capable battery-powered party speakers JBL makes. It delivers huge output, strong bass performance that will get your guests moving, an eye-catching full-panel light show, and the flexibility of dual-swappable batteries for off-grid use. With customizable sound and solid connection options, the PartyBox 720 easily becomes the life of the party wherever you bring it.

Otherwise, if you still want to party with a sweet built-in light show but like the idea of a more manageable form factor, you can check out the 720’s smaller siblings, the PartyBox 520 ($879.95 at Amazon) and PartyBox Stage 320 ($599.95 at Amazon).

JBL PartyBox 720 review: FAQs