Short answer: the Partybox 720 for most people - it’s cheaper, has deeper bass, and gives you real EQ control; the Bromley 750 if all-around sound coverage matters more than raw bass. These rank #13 and #6 out of 13 large-party speakers, at $999.99 and $1,099.95, with the Bromley 750 costing $99.96 more.
The Bromley 750’s standout feature is dispersion. Unlike the Partybox 720, which fires forward and thins out as you move to the side, the Bromley 750 projects sound in every direction fairly evenly - genuinely useful if the speaker sits in the middle of a space rather than against a wall.
The Partybox 720 wins on bass and tuning control. Our own notes on the Bromley 750 are direct: it isn’t as deep in the bass as the Partybox 720, and its overall frequency response isn’t great, with some midrange peaks. The Bromley 750 only offers basic bass and treble sliders, while the Partybox 720 has a full app EQ with presets and a custom mode - and the Bromley’s default “dynamic” bass setting runs heavy out of the box and needs trimming to sound its best.
Both are wheeled, mains-optional party speakers with XLR-level inputs, though the Bromley 750 more than doubles the Partybox 720’s battery life - 40-plus hours against 15.
Buy the Partybox 720 for deeper, better-controlled bass and real EQ, at a lower price. Buy the Bromley 750 if even coverage around the speaker and a much longer battery matter more to you than bass depth.
Want more options? Browse the full Portable Bluetooth rankings.
Prices on this page were last checked November 11, 2026 at 3:26 AM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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Specifications Side By Side
| Marshall Bromley 750 | JBL Partybox 720 | |
|---|---|---|
| Price | $999.99 | $1,099.95 |
| Ranked | #13 of 13 in Large Party Size Portable Bluetooth Speakers | #6 of 13 in Large Party Size Portable Bluetooth Speakers |
| Aux Input | Yes (3.5mm, RCA) | Yes |
| Battery Life | 40+ hours (Manufacturer specified) | 15 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC, AAC, LC3 | SBC |
| Guitar Input | Yes | Yes |
| IP Rating | IP54 | IPX4 |
| Microphone Input | Yes (2x XLR/6.35mm combo) | Yes (Karaoke mode with echo effect) |
| Power Bank | Yes (USB-C) | Yes (USB-C) |
| Power Input | USB-C | AC Power cord |
| Weight | 52.7 lbs (23.9 kg) | 68.3 lbs (31 kg) |
| XLR Input | Yes (2x combo) | - |
| App | Yes (Marshall Bluetooth app) | Yes |
| Built-in Microphone | No | No |
| EQ | Yes | Yes (5 band) |
| Party Mode | Yes (Auracast) | Yes (Auracast) |
| Stereo | Yes | Yes |
| Omnidirectional | Yes | No |
| TWS | No | Yes |
| USB Playback | No | Yes |
| Wi-Fi | No | No |
| Bluetooth Version | 5.3 | 5.4 |
| Dimensions | 16.3” x 25.7” x 14” (413 x 652 x 355 mm) | 16.4” x 37.1” x 16” (416 x 942 x 406 mm) |
| Drivers | 2x 10” woofers, 2x 5.25” mid-ranges, 2x 1” tweeters, 2x 0.8” tweeters | 2x 9” woofer, 2x 1.25” dome tweeter |
| Amplifier Power | 400W | 800W |
| Digital Aux Input | Yes (USB-C) | No |
| Removable Battery | Yes | Yes |
| Charging Time | 3.5 hours | - |
| Frequency Response | 20Hz - 20kHz (Manufacturer specified) | - |
| Lights | Yes | Yes |
| Strap | No | No |
| Wheels | - | Yes |
Watch Them Compared
Videos and reviews that test both speakers side by side.
- Joy & Oluv’Sone: Marshall Bromley 750 vs JBL Partybox 720 - outdoor test
- Oluv Patreon: JBL Partybox 720 vs Marshall Bromley 750
- Oluv Patreon: JBL Partybox 720 vs Marshall Bromley 750 - outdoor test
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