Short answer: the Sony ULT Tower 9. It ranks #8 of 11 large party speakers by sound quality at $800; the Marshall Bromley 750 ranks #11 and costs $1199.99, so there is not much of a tradeoff to weigh.
The case for the Sony ULT Tower 9: Slightly better sounding than the ULT Tower 10. The tradeoff: Not as deep of bass and loses more bass at high volume even compared to the lower end Partybox speakers.
What the Marshall Bromley 750 gets right: 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 catch: Not as deep bass as the JBL Partybox 330 or JBL Partybox 720.
Buy the Sony ULT Tower 9. It ranks higher for sound quality than the Marshall Bromley 750 and costs less, so there is no real case for the other one.
If sound quality matters at all to you, skip the Marshall Bromley 750. It ranks near the bottom of the 11 large party speakers, so look higher up the list instead.
If battery life is a priority, the Marshall Bromley 750 is rated for 40 hours versus 25 hours for the Sony ULT Tower 9.
If water resistance matters to you, the Marshall Bromley 750 at IP54 (splashing) holds up far better than the Sony ULT Tower 9 at no water resistance.
Specifications Side By Side
| Sony ULT Tower 9 | Marshall Bromley 750 | |
|---|---|---|
| Price | $800 | $1,199.99 |
| Ranked | #8 of 11 in Large Party Size Portable Bluetooth Speakers | #11 of 11 in Large Party Size Portable Bluetooth Speakers |
| App | Yes | Yes (Marshall Bluetooth app) |
| Aux Input | Yes | Yes (3.5mm, RCA) |
| Battery Life | 25 hours (Manufacturer specified) | 40+ hours (Manufacturer specified) |
| EQ | Yes (10 band) | Yes |
| Guitar Input | Yes | Yes |
| Microphone Input | Yes (Karaoke mode with echo effect) | Yes (2x XLR/6.35mm combo) |
| Party Mode | Yes (Auracast up to 100 speakers) | Yes (Auracast) |
| Power Bank | Yes (USB-A, 5V/1.5A) | Yes (USB-C) |
| Power Input | AC Power cord | USB-C |
| Removable Battery | No | Yes |
| TWS | Yes | No |
| USB Playback | Yes | No |
| Weight | 65.3 lbs / 29.6 kg | 52.7 lbs / 23.9 kg |
| Built in Microphone | No | No |
| IP Rating | None | IP54 |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| Wifi | No | No |
| Bluetooth Codecs | SBC, AAC, LDAC | SBC, AAC, LC3 |
| Bluetooth Version | 5.3 | 5.3 |
| Dimensions | 16.1" x 35.8" x 18" (410 x 910 x 456 mm) | 16.3" x 25.7" x 14" (413 x 652 x 355 mm) |
| Drivers | 7 drivers: 1x 12.6"x12.6" woofer, 2x 4.7" midrange, 2x 2" tweeter, 2x 1.6" rear tweeter | 2x 10" woofers, 2x 5.25" mid-ranges, 2x 1" tweeters, 2x 0.8" tweeters |
| Output Power | 148W | 400W |
| Digital Aux Input | No | Yes (USB-C) |
| XLR Input | - | Yes (2x combo) |
| Charging Time | - | 3.5 hours |
| Frequency Response | - | 20Hz - 20kHz (Manufacturer specified) |
| Discontinued | - | No |
Related Speaker Comparisons
More useful head-to-heads from the same speaker class:
- JBL Partybox 1000 vs Sony SRS-XV900
- JBL Partybox 720 vs Sony SRS-XV900
- Teufel Rockster 2 vs Sony ULT Tower 10
- JBL Partybox 710 vs Marshall Bromley 750
- Sony ULT Tower 10 vs Marshall Bromley 750
The Two Speakers In Full
Sony ULT Tower 9: $800 Amazon
Pros: Slightly better sounding than the ULT Tower 10
Cons: Not as deep of bass and loses more bass at high volume even compared to the lower end Partybox speakers. Bass drops off a lot at higher volumes. Not quite as loud as the ULT Tower 10
Full Sony ULT Tower 9 review and specifications →
| App | Yes |
|---|---|
| Aux Input | Yes |
| Battery Life | 25 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, AAC, LDAC |
| Bluetooth Version | 5.3 |
| Built in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 16.1" x 35.8" x 18" (410 x 910 x 456 mm) |
| Drivers | 7 drivers: 1x 12.6"x12.6" woofer, 2x 4.7" midrange, 2x 2" tweeter, 2x 1.6" rear tweeter |
| EQ | Yes (10 band) |
| Guitar Input | Yes |
| IP Rating | None |
| Microphone Input | Yes (Karaoke mode with echo effect) |
| Omnidirectional | No |
| Output Power | 148W |
| Party Mode | Yes (Auracast up to 100 speakers) |
| Power Bank | Yes (USB-A, 5V/1.5A) |
| Power Input | AC Power cord |
| Removable Battery | No |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 65.3 lbs / 29.6 kg |
| Wifi | No |
As an eBay Partner, we may be compensated if you make a purchase.
- Links
- Reviews, Comparisons and Sound Samples
- Oluv Patreon: Sony ULT Tower 9 vs JBL Partybox 720 - indoor listening test
- Oluv Patreon: Sony ULT Tower 9 vs JBL Partybox 720 - power generator test
- GYMCADDY: Sony ULT Tower 9 Vs Sony ULT Tower 10 - Size Doesn’t Matter
- GYMCADDY: Sony ULT Tower 9 Review - Amazing Instrument Separation
- GYMCADDY: JBL Partybox 720 Vs Sony ULT Tower 9
- Reddit Search for Sony ULT Tower 9 Review
- Head-to-Head Comparisons
- Sony ULT Tower 9 vs Sony ULT Tower 10
- Sony ULT Tower 9 vs Teufel Rockster
- Sony ULT Tower 9 vs JBL Partybox 520
- Sony ULT Tower 9 vs Sony SRS-XV900
- Sony ULT Tower 9 vs JBL Partybox 710
- Sony ULT Tower 9 vs JBL Partybox 720
- Sony ULT Tower 9 vs Teufel Rockster 2
- Sony ULT Tower 9 vs JBL Partybox 1000
- See all 9 comparisons
Marshall Bromley 750: $1,199.99 Amazon
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 →
| 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 |
| Microphone Input | Yes (2x XLR/6.35mm combo) |
| Omnidirectional | No |
| Output Power | 400W |
| 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 |
| Wifi | No |
| XLR Input | Yes (2x combo) |
As an eBay Partner, we may be compensated if you make a purchase.
- Links
- Reviews, Comparisons and Sound Samples
- Joy & Oluv’Sone: Marshall Bromley 750 vs JBL Partybox 720 - outdoor test
- Storytripper HD: W-King T12 vs Marshall Bromley 750
- Danny Pops: I Finally Got The Marshall Bromley 750 Everyone Wanted
- 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
- Reddit Search for Marshall Bromley 750 Review
- Head-to-Head Comparisons
- Marshall Bromley 750 vs Sony SRS-XV900
- Marshall Bromley 750 vs Sony ULT Tower 10
- 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
- Marshall Bromley 750 vs JBL Partybox 1000
- Marshall Bromley 750 vs JBL Partybox Ultimate
- See all 11 comparisons