Short answer: the Sony ULT Tower Max. It ranks #1 of 12 large party speakers by sound quality, rated 4.8/5, at $1,499.99. The Marshall Bromley 750 ranks #12, rated 3.6/5, at $999.95, $500.04 cheaper, which does not close the gap in sound quality.
The case for the Sony ULT Tower Max: AudioTribe measured 110.6dBC at roughly 6m outdoors with Flat EQ and ULT1 enabled, 4.4dB above the JBL PartyBox Ultimate in the same setup. The tradeoff: The same comparison found it 1.2dB behind the JBL in A-weighted loudness and weaker below 40Hz.
Why pick the Marshall Bromley 750: 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. The tradeoff: Not as deep bass as the JBL Partybox 330 or JBL Partybox 720.
Buy the Sony ULT Tower Max. It is rated higher for sound quality, and the $500.04 saving on the Marshall Bromley 750 is not enough to make up the difference.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| Sony ULT Tower Max | Marshall Bromley 750 | |
|---|---|---|
| Price | $1,499.99 | $999.95 |
| Ranked | #1 of 12 in Large Party Size Portable Bluetooth Speakers | #12 of 12 in Large Party Size Portable Bluetooth Speakers |
| App | Yes (Sony Sound Connect) | Yes (Marshall Bluetooth app) |
| Aux Input | RCA input | Yes (3.5mm, RCA) |
| Battery Life | No Battery | 40+ hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, AAC, LDAC | SBC, AAC, LC3 |
| Bluetooth Version | 5.3 | 5.3 |
| Built-in Microphone | No | No |
| Digital Aux Input | No | Yes (USB-C) |
| Dimensions | 21” x 41.8” x 18.6” (534 x 1062 x 472 mm) | 16.3” x 25.7” x 14” (413 x 652 x 355 mm) |
| Drivers | 9 drivers: 3x 11” woofer (2 front, 1 rear), 2x 4.7” midrange, 2x 1” tweeter, 2x 1.6” rear tweeter | 2x 10” woofers, 2x 5.25” mid-ranges, 2x 1” tweeters, 2x 0.8” tweeters |
| EQ | Yes (10 band; ULT1 / ULT2 / Flat / Live) | Yes |
| Guitar Input | No | Yes |
| IP Rating | Splashproof top surface | IP54 |
| Microphone Input | Yes (6.3mm) | Yes (2x XLR/6.35mm combo) |
| Omnidirectional | Yes (360 degree Party Sound) | No |
| Amplifier Power | 2,150W (manufacturer specified) | 400W |
| Party Mode | Yes (Party Chain) | Yes (Auracast) |
| Power Bank | Yes (USB charging) | Yes (USB-C) |
| Power Input | AC 120-240V, 50/60Hz | USB-C |
| Removable Battery | No | Yes |
| Stereo | Yes | Yes |
| TWS | Yes (Stereo Pair) | No |
| USB Playback | Yes (USB-A) | No |
| Weight | 124.1 lbs (56.3 kg) | 52.7 lbs (23.9 kg) |
| Wi-Fi | No | No |
| Lights | Yes | Yes |
| Wheels | Yes | - |
| Strap | No | - |
| XLR Input | - | Yes (2x combo) |
| Charging Time | - | 3.5 hours |
| Frequency Response | - | 20Hz - 20kHz (Manufacturer specified) |
| Discontinued | - | No |
Related Speaker Comparisons
More worthwhile head-to-heads for Sony ULT Tower Max:
- Sony ULT Tower Max vs JBL Partybox Ultimate
- Sony ULT Tower Max vs JBL Partybox 1000
- Sony ULT Tower Max vs Teufel Rockster 2
- Sony ULT Tower Max vs JBL Partybox 720
- JBL Partybox 710 vs Sony ULT Tower Max
Prices on this page were last checked September 26, 2026 at 11:14 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
Sony ULT Tower Max: $1,499.99 Amazon eBay
Pros: AudioTribe measured 110.6dBC at roughly 6m outdoors with Flat EQ and ULT1 enabled, 4.4dB above the JBL PartyBox Ultimate in the same setup. Its three 11-inch woofers held about 110dB from 40-100Hz; Sony also provides 10-band EQ, Sound Field Optimization, RCA and XLR inputs, USB-C, a mic input, and XLR output.
Cons: The same comparison found it 1.2dB behind the JBL in A-weighted loudness and weaker below 40Hz. At 56.3kg (124lb) and AC-only, this is a wheeled event speaker rather than a portable battery model.
Full Sony ULT Tower Max review and specifications →
| Amplifier Power | 2,150W (manufacturer specified) |
|---|---|
| App | Yes (Sony Sound Connect) |
| Aux Input | RCA input |
| Battery Life | No Battery |
| Bluetooth Codecs | SBC, AAC, LDAC |
| Bluetooth Version | 5.3 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 21” x 41.8” x 18.6” (534 x 1062 x 472 mm) |
| Drivers | 9 drivers: 3x 11” woofer (2 front, 1 rear), 2x 4.7” midrange, 2x 1” tweeter, 2x 1.6” rear tweeter |
| EQ | Yes (10 band; ULT1 / ULT2 / Flat / Live) |
| Guitar Input | No |
| IP Rating | Splashproof top surface |
| Lights | Yes |
| Microphone Input | Yes (6.3mm) |
| Omnidirectional | Yes (360 degree Party Sound) |
| Party Mode | Yes (Party Chain) |
| Power Bank | Yes (USB charging) |
| Power Input | AC 120-240V, 50/60Hz |
| Removable Battery | No |
| Stereo | Yes |
| Strap | No |
| TWS | Yes (Stereo Pair) |
| USB Playback | Yes (USB-A) |
| Weight | 124.1 lbs (56.3 kg) |
| Wheels | Yes |
| Wi-Fi | No |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Sony ULT Tower Max vs JBL Partybox Ultimate
- Sony ULT Tower Max vs JBL Partybox 1000
- Sony ULT Tower Max vs Teufel Rockster 2
- Sony ULT Tower Max vs JBL Partybox 720
- Sony ULT Tower Max vs JBL Partybox 710
- Sony ULT Tower Max vs JBL Partybox 520
- Sony ULT Tower Max vs Sony ULT Tower 9
- Sony ULT Tower Max vs Sony ULT Tower 10
- See all 27 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 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) |
| Discontinued | No |
| 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 | No |
| Party Mode | Yes (Auracast) |
| Power Bank | Yes (USB-C) |
| Power Input | USB-C |
| Removable Battery | Yes |
| Stereo | Yes |
| 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 16 comparisons