These sit in different size classes, so this is not a straight ranking comparison. The JBL Partybox Stage 320 ranks #3 of 39 party speakers by sound quality at $499.95; the Marshall Bromley 750 ranks #12 of 12 large party speakers by sound quality at $1299.99.
Short answer: the JBL Partybox Stage 320 comes out ahead here, rated 4.6 versus the Marshall Bromley 750’s 3.6. On the JBL Partybox Stage 320: Handle and wheels are convenient. The Marshall Bromley 750 offers 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.
Where they differ on paper:
- Battery Life: 18 hours (Manufacturer specified) vs 40+ hours (Manufacturer specified)
- IP Rating: IPX4 vs IP54
- Drivers: 2x 6.5” woofers, 2x 25mm tweeters vs 2x 10” woofers, 2x 5.25” mid-ranges, 2x 1” tweeters, 2x 0.8” tweeters
- Amplifier Power: 240W vs 400W
Choose the JBL Partybox Stage 320: Handle and wheels are convenient. Watch for: slightly sibilant in the treble at full blast. It costs less too, $499.95 against $1299.99.
Lean toward the Marshall Bromley 750 for much wider, more consistent off-axis dispersion than the JBL: Watch for: not as deep bass as the JBL Partybox 330 or JBL Partybox 720. It’s also the more expensive option, $1299.99 against $499.95.
Buy the JBL Partybox Stage 320 at $499.95 for a party speaker, or the Marshall Bromley 750 at $1299.99 for a large party speaker instead.
The Marshall Bromley 750 is not a sound-quality pick. It sits near the bottom of the 12 large party speakers; there are better options higher up.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| JBL Partybox Stage 320 | Marshall Bromley 750 | |
|---|---|---|
| Price | $499.95 | $1,299.99 |
| Ranked | #3 of 39 in Party Size Portable Bluetooth Speakers | #12 of 12 in Large Party Size Portable Bluetooth Speakers |
| App | Yes | Yes (Marshall Bluetooth app) |
| Aux Input | Yes | Yes (3.5mm, RCA) |
| Battery Life | 18 hours (Manufacturer specified) | 40+ hours (Manufacturer specified) |
| Bluetooth Codecs | SBC | SBC, AAC, LC3 |
| Bluetooth Version | 5.4 | 5.3 |
| Drivers | 2x 6.5" woofers, 2x 25mm tweeters | 2x 10" woofers, 2x 5.25" mid-ranges, 2x 1" tweeters, 2x 0.8" tweeters |
| EQ | Yes (5 band) | Yes |
| Guitar Input | Yes | Yes |
| IP Rating | IPX4 | IP54 |
| Microphone Input | Yes (Karaoke mode with echo effect) | Yes (2x XLR/6.35mm combo) |
| Party Mode | Yes (Auracast) | Yes (Auracast) |
| Power Bank | Yes (USB-A, 5V/2.1A) | Yes (USB-C) |
| Power Input | AC Power cord | USB-C |
| Removable Battery | Yes | Yes |
| Stereo | Partially | Yes |
| Omnidirectional | No | No |
| TWS | Yes | No |
| USB Playback | Yes | No |
| Weight | 36.4 lbs (16.5 kg) | 52.7 lbs (23.9 kg) |
| Amplifier Power | 240W | 400W |
| Digital Aux Input | No | Yes (USB-C) |
| Lights | Yes | Yes |
| Wheels | Yes | - |
| XLR Input | - | Yes (2x combo) |
| Built-in Microphone | - | No |
| Wi-Fi | - | No |
| Dimensions | - | 16.3" x 25.7" x 14" (413 x 652 x 355 mm) |
| Charging Time | - | 3.5 hours |
| Frequency Response | - | 20Hz - 20kHz (Manufacturer specified) |
| Discontinued | - | No |
Related Speaker Comparisons
How JBL Partybox Stage 320 compares with other leading options:
- Sony ULT Tower 7 vs JBL Partybox Stage 320
- JBL Partybox 330 vs JBL Partybox Stage 320
- JBL Partybox 310 vs JBL Partybox Stage 320
- Sony ULT Tower 5 vs JBL Partybox Stage 320
- JBL Partybox Club 120 vs JBL Partybox Stage 320
Prices on this page were last checked September 17, 2026 at 12:43 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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The Two Speakers In Full
JBL Partybox Stage 320: $499.95 Amazon B&H Photo Video eBay
Pros: Handle and wheels are convenient. Customizable color lighting modes. Keeps more bass than the 310 at high volume. Removable battery.
Cons: Slightly sibilant in the treble at full blast. Very large.
Full JBL Partybox Stage 320 review and specifications →
| Amplifier Power | 240W |
|---|---|
| App | Yes |
| Aux Input | Yes |
| Battery Life | 18 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.4 |
| Digital Aux Input | No |
| Drivers | 2x 6.5" woofers, 2x 25mm tweeters |
| EQ | Yes (5 band) |
| Guitar Input | Yes |
| IP Rating | IPX4 |
| Lights | Yes |
| Microphone Input | Yes (Karaoke mode with echo effect) |
| Omnidirectional | No |
| Party Mode | Yes (Auracast) |
| Power Bank | Yes (USB-A, 5V/2.1A) |
| Power Input | AC Power cord |
| Removable Battery | Yes |
| Stereo | Partially |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 36.4 lbs (16.5 kg) |
| Wheels | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Oluv Patreon: JBL Partybox 320 vs 520 - indoor listening session More from Oluv’Sone →
- Oluv Patreon: JBL Partybox 320 vs 520 - outdoor test
- Jay’s Straight Up Reviews & More: JBL Partybox Stage 320 vs 310 🛜 Defcon 5🚨 Bass Alert! Take Shelter Immediately! 😲 Best Bass Goes To? More from JaysStraightUpReviews →
- Jay’s Straight Up Reviews & More: JBL Partybox Stage 320 vs 310 🥳 A Family Feud! Battery Powered🔋Bluetooth Party Speakers Face-Off🤬
- GYMCADDY: JBL PartyBox Stage 320 Review - Big Upgrades Everywhere, Worth The Upgrade More from GYMCADDY →
- M1MTechChannel: Welche JBL Partybox ist die BESTE ? Alle Partyboxen im Vergleich | 2026 More from M1MTechChannel →
- M1MTechChannel: soundcore Rave 3S mit 200W | LAUTER als die JBL Partybox 320 ?
- Head-to-Head Comparisons
- JBL Partybox Stage 320 vs JBL Partybox 330
- JBL Partybox Stage 320 vs JBL Partybox 310
- JBL Partybox Stage 320 vs Sony ULT Tower 5
- JBL Partybox Stage 320 vs Sony ULT Tower 7
- JBL Partybox Stage 320 vs JBL Partybox Club 120
- JBL Partybox Stage 320 vs JBL Partybox 130
- JBL Partybox Stage 320 vs JBL Partybox 100
- JBL Partybox Stage 320 vs JBL Partybox 110
- See all 66 comparisons
Marshall Bromley 750: $1,299.99 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 15 comparisons