Short answer: the Partybox 1000 if you want maximum output and don’t need portability or app control; the Bromley 750 if you need it to run on battery. These rank #13 and #4 out of 13 large-party speakers, at $999.99 and $1,099.95, with the Bromley 750 costing $99.96 more.
The Partybox 1000 has no battery and no app - it’s built purely to be plugged in and cranked. It’s rated at 1100W against the Bromley 750’s 400W, nearly triple, and our own notes call it right up there with the flagship Partybox Ultimate for output. The Bromley 750 trades that ceiling for genuine portability: 40-plus hours of battery life and app-based control the Partybox 1000 simply doesn’t offer.
Sound character is a different trade too. The Bromley 750’s own notes flag its bass as not especially deep and its frequency response as unremarkable, with some midrange peaks - the Partybox 1000, by contrast, inherits the same big-driver approach as the Ultimate that our notes rate among the deepest-bass Bluetooth speakers around.
Both are heavy, wheeled units - the Partybox 1000 is the bulkier of the two at 34 kg (75 lbs) against the Bromley 750’s 23.9 kg (52.7 lbs) - and both take guitar and karaoke-style microphone input, with the Bromley 750 adding true XLR-level jacks.
Buy the Partybox 1000 for maximum output if it’s staying near an outlet. Buy the Bromley 750 if you actually need battery power and app control.
There is a real gap in water resistance: the Marshall Bromley 750 at IP54 (splashing) against the JBL Partybox 1000, which has no water resistance.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
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Specifications Side By Side
| Marshall Bromley 750 | JBL Partybox 1000 | |
|---|---|---|
| Price | $999.99 | $1,099.95 |
| Ranked | #13 of 13 in Large Party Size Portable Bluetooth Speakers | #4 of 13 in Large Party Size Portable Bluetooth Speakers |
| Aux Input | Yes (3.5mm, RCA) | Yes |
| Battery Life | 40+ hours (Manufacturer specified) | No Battery |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC, AAC, LC3 | SBC |
| Guitar Input | Yes | Yes |
| IP Rating | IP54 | None |
| Microphone Input | Yes (2x XLR/6.35mm combo) | Yes (Karaoke mode with echo effect) |
| Power Bank | Yes (USB-C) | Yes (USB-A) |
| Power Input | USB-C | AC Power cord |
| Weight | 52.7 lbs (23.9 kg) | 75 lbs (34 kg) |
| XLR Input | Yes (2x combo) | - |
| App | Yes (Marshall Bluetooth app) | No |
| Built-in Microphone | No | No |
| EQ | Yes | Yes |
| Party Mode | Yes (Auracast) | No |
| Stereo | Yes | Yes |
| Omnidirectional | Yes | No |
| TWS | No | Yes |
| USB Playback | No | Yes |
| Wi-Fi | No | No |
| Bluetooth Version | 5.3 | 4.2 |
| Dimensions | 16.3” x 25.7” x 14” (413 x 652 x 355 mm) | 15.6” x 41.3” x 15.4” (397 x 1050 x 390 mm) |
| Drivers | 2x 10” woofers, 2x 5.25” mid-ranges, 2x 1” tweeters, 2x 0.8” tweeters | 1x 12” down-firing woofer, 2x 7” midrange, 1x compression horn tweeter |
| Amplifier Power | 400W | 1100W |
| Digital Aux Input | Yes (USB-C) | No |
| Removable Battery | Yes | - |
| Charging Time | 3.5 hours | - |
| Frequency Response | 20Hz - 20kHz (Manufacturer specified) | - |
| Lights | Yes | Yes |
| Strap | No | No |
| Wheels | - | Yes |
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