Short answer: it depends on whether you need a battery. The JBL Partybox Ultimate 2 runs only on mains power, while the Marshall Bromley 750 has a battery rated for 40 hours. The JBL Partybox Ultimate 2 ranks higher on sound quality (#7 vs #13 of 13 large party speakers, 4.7/5 vs 3.6/5). Get the JBL Partybox Ultimate 2 if it will always be plugged in, or the Marshall Bromley 750 if you want to play away from an outlet.
The JBL Partybox Ultimate 2 is the better-sounding option. A 1500W RMS system (up from the original Ultimate’s 1100W) driving dual 264mm subwoofers, dual 124mm mid-range drivers and dual 30mm horn-loaded PEN tweeters, with manufacturer-rated extension to 28Hz (-6dB) from a 1.05m-tall cabinet. It streams over Wi-Fi as well as Bluetooth, which the Marshall Bromley 750 cannot. The tradeoff: AC-only: there is no battery, so it needs mains power wherever it goes.
The Marshall Bromley 750 is the battery-powered, lighter choice. Much wider, more consistent off-axis dispersion than the JBL Partybox 720, which only fires forward: the Marshall’s standout feature, sounding about the same from any angle. Its battery is rated for 40 hours, while the JBL Partybox Ultimate 2 needs an outlet. At 52.7 lbs (23.9 kg) it weighs much less than the JBL Partybox Ultimate 2 at 105.1 lbs (47.68 kg). It supports AAC Bluetooth, which the JBL Partybox Ultimate 2 lacks. Watch for: Not as deep bass as the JBL Partybox 330 or JBL Partybox 720.
Buy the Marshall Bromley 750 if you need to play away from an outlet. Buy the JBL Partybox Ultimate 2 if it will always be plugged in.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| JBL Partybox Ultimate 2 | Marshall Bromley 750 | |
|---|---|---|
| Price | £1,399.00 Upcoming | $999.95 |
| Ranked | #7 of 13 in Large Party Size Portable Bluetooth Speakers | #13 of 13 in Large Party Size Portable Bluetooth Speakers |
| Amplifier Power | 1500W RMS | 400W |
| App | JBL One | Yes (Marshall Bluetooth app) |
| Aux Input | Yes | Yes (3.5mm, RCA) |
| Battery Life | No Battery | 40+ hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC, AAC, LC3 |
| Bluetooth Version | 5.3 | 5.3 |
| Built-in Microphone | No | No |
| Digital Aux Input | No | Yes (USB-C) |
| Dimensions | 18.4” x 41.4” x 19.4” (466.7 x 1052.5 x 493.3 mm) | 16.3” x 25.7” x 14” (413 x 652 x 355 mm) |
| Drivers | 2x 264mm subwoofer, 2x 124mm mid-range, 2x 30mm horn-loaded tweeter | 2x 10” woofers, 2x 5.25” mid-ranges, 2x 1” tweeters, 2x 0.8” tweeters |
| EQ | Yes (Smart EQ Mode) | Yes |
| Frequency Response | 28Hz - 20kHz (-6dB) | 20Hz - 20kHz (Manufacturer specified) |
| Guitar Input | Yes | Yes |
| IP Rating | IPX4 | IP54 |
| Lights | Yes | Yes |
| Microphone Input | Yes (EasySing AI vocal removal) | Yes (2x XLR/6.35mm combo) |
| Omnidirectional | No | Yes |
| Optical Input | Yes | - |
| Party Mode | Yes (Auracast) | Yes (Auracast) |
| Power Bank | Yes (USB-C PD, up to 20V/1.5A) | Yes (USB-C) |
| Power Input | AC Power cord | USB-C |
| Stereo | Yes | Yes |
| Strap | No | No |
| Streaming Services | AirPlay 2, Chromecast, Spotify Connect | - |
| TWS | Yes | No |
| USB Playback | Yes | No |
| Weight | 105.1 lbs (47.68 kg) | 52.7 lbs (23.9 kg) |
| Wi-Fi | Yes | No |
| Wheels | Yes | - |
| XLR Input | - | Yes (2x combo) |
| Removable Battery | - | Yes |
| Charging Time | - | 3.5 hours |
Related Speaker Comparisons
More top alternatives to JBL Partybox Ultimate 2:
- Sony ULT Tower Max vs JBL Partybox Ultimate 2
- JBL Partybox Ultimate vs JBL Partybox Ultimate 2
- JBL Partybox 1000 vs JBL Partybox Ultimate 2
- JBL Partybox Ultimate 2 vs Teufel Rockster 2
- JBL Partybox 720 vs JBL Partybox Ultimate 2
Prices on this page were last checked October 4, 2026 at 9:58 PM 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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The Two Speakers In Full
JBL Partybox Ultimate 2: £1,399.00 Upcoming Estimated Peter Tyson
Older model: the JBL Partybox Ultimate (ranked higher, rated 4.7/5).
Pros: A 1500W RMS system (up from the original Ultimate’s 1100W) driving dual 264mm subwoofers, dual 124mm mid-range drivers and dual 30mm horn-loaded PEN tweeters, with manufacturer-rated extension to 28Hz (-6dB) from a 1.05m-tall cabinet. Wi-Fi streaming with AirPlay 2, Chromecast and Spotify Connect sits alongside Bluetooth 5.3 and Auracast multi-speaker linking. Inputs cover an XLR line-in, mic, guitar, aux, optical and USB-C playback, and karaoke gets AI vocal removal. JBL One app control, a full-panel light show with floor projection, and wheels plus a handle for its 47.68kg. IPX4 splash resistance.
Cons: AC-only: there is no battery, so it needs mains power wherever it goes. At 47.68kg and just over a metre tall it is still a two-person lift despite the wheels, and 47.68kg is heavier than the 39kg model it replaces. IPX4 only shrugs off splashes, not rain or dust. No independent measurements have been published yet, so its real output and sound quality can’t be compared with ranked speakers. Not yet sold in the US.
Full JBL Partybox Ultimate 2 review and specifications →
| Amplifier Power | 1500W RMS |
|---|---|
| App | JBL One |
| Aux Input | Yes |
| Battery Life | No Battery |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.3 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 18.4” x 41.4” x 19.4” (466.7 x 1052.5 x 493.3 mm) |
| Drivers | 2x 264mm subwoofer, 2x 124mm mid-range, 2x 30mm horn-loaded tweeter |
| EQ | Yes (Smart EQ Mode) |
| Frequency Response | 28Hz - 20kHz (-6dB) |
| Guitar Input | Yes |
| IP Rating | IPX4 |
| Lights | Yes |
| Microphone Input | Yes (EasySing AI vocal removal) |
| Omnidirectional | No |
| Optical Input | Yes |
| Party Mode | Yes (Auracast) |
| Power Bank | Yes (USB-C PD, up to 20V/1.5A) |
| Power Input | AC Power cord |
| Stereo | Yes |
| Strap | No |
| Streaming Services | AirPlay 2, Chromecast, Spotify Connect |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 105.1 lbs (47.68 kg) |
| Wheels | Yes |
| Wi-Fi | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- No independent measurement review is linked for this model; it is ranked from hands-on listening and comparison against similarly priced speakers.
- Head-to-Head Comparisons
- JBL Partybox Ultimate 2 vs JBL Partybox 520
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- JBL Partybox Ultimate 2 vs Sony ULT Tower 10
- JBL Partybox Ultimate 2 vs JBL Partybox 1000
- JBL Partybox Ultimate 2 vs JBL Partybox Ultimate
- See all 10 comparisons
Marshall Bromley 750: $999.95 Amazon eBay
Pros: Much wider, more consistent off-axis dispersion than the JBL Partybox 720, which only fires forward: the Marshall’s standout feature, sounding about the same from any angle.
Cons: Not as deep bass as the JBL Partybox 330 or JBL Partybox 720. Not a great frequency response overall, with some midrange peaks. Only basic bass/treble controls, no full custom EQ like the JBL Partybox 720’s app. Default bass (dynamic mode) is overdone out of the box and needs trimming.
Full Marshall Bromley 750 review and specifications →
| Amplifier Power | 400W |
|---|---|
| App | Yes (Marshall Bluetooth app) |
| Aux Input | Yes (3.5mm, RCA) |
| Battery Life | 40+ hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC, AAC, LC3 |
| Bluetooth Version | 5.3 |
| Built-in Microphone | No |
| Charging Time | 3.5 hours |
| Digital Aux Input | Yes (USB-C) |
| Dimensions | 16.3” x 25.7” x 14” (413 x 652 x 355 mm) |
| Drivers | 2x 10” woofers, 2x 5.25” mid-ranges, 2x 1” tweeters, 2x 0.8” tweeters |
| EQ | Yes |
| Frequency Response | 20Hz - 20kHz (Manufacturer specified) |
| Guitar Input | Yes |
| IP Rating | IP54 |
| Lights | Yes |
| Microphone Input | Yes (2x XLR/6.35mm combo) |
| Omnidirectional | Yes |
| Party Mode | Yes (Auracast) |
| Power Bank | Yes (USB-C) |
| Power Input | USB-C |
| Removable Battery | Yes |
| Stereo | Yes |
| Strap | No |
| TWS | No |
| USB Playback | No |
| Weight | 52.7 lbs (23.9 kg) |
| Wi-Fi | No |
| XLR Input | Yes (2x combo) |
- Links
- Reviews, Comparisons and Sound Samples
- Joy & Oluv’Sone: Marshall Bromley 750 vs JBL Partybox 720 - outdoor test More from Oluv’Sone →
- Storytripper HD: W-King T12 vs Marshall Bromley 750 More from storytripperhd →
- Danny Pops: I Finally Got The Marshall Bromley 750 Everyone Wanted More from DannyPops →
- Oluv Patreon: JBL Partybox 720 vs Marshall Bromley 750
- Oluv Patreon: Marshall Bromley 750 - battery issues in the cold
- Oluv Patreon: Marshall Bromley 750 & Teufel Rockster Air 2 - outdoor test
- Oluv Patreon: Marshall Bromley 750 - 2nd look after update
- Oluv Patreon: Marshall Bromley 750 - first impressions
- Head-to-Head Comparisons
- Marshall Bromley 750 vs Sony SRS-XV900
- Marshall Bromley 750 vs Sony ULT Tower 10
- Marshall Bromley 750 vs Sony ULT Tower 9
- Marshall Bromley 750 vs Teufel Rockster
- Marshall Bromley 750 vs JBL Partybox 520
- Marshall Bromley 750 vs JBL Partybox 710
- Marshall Bromley 750 vs JBL Partybox 720
- Marshall Bromley 750 vs Teufel Rockster 2
- See all 19 comparisons