These are not really the same size class, and that is the honest framing here. The JBL Partybox Stage 320 ranks #3 of 39 party speakers by sound quality at $499.95; the Sony ULT Tower Max ranks #1 of 12 large party speakers by sound quality at $1499.99.
Short answer: reviews favor the Sony ULT Tower Max, 4.8 versus 4.6 for the JBL Partybox Stage 320. Worth noting on the JBL Partybox Stage 320: Handle and wheels are convenient. What stands out on the Sony ULT Tower Max is 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.
Where they differ on paper:
- Battery Life: 18 hours (Manufacturer specified) vs No Battery
- IP Rating: IPX4 vs Splashproof top surface
- Drivers: 2x 6.5” woofers, 2x 25mm tweeters vs 9 drivers: 3x 11” woofer (2 front, 1 rear), 2x 4.7” midrange, 2x 1” tweeter, 2x 1.6” rear tweeter
- Amplifier Power: 240W vs 2,150W (manufacturer specified)
Choose the JBL Partybox Stage 320: Handle and wheels are convenient. Watch for: slightly sibilant in the treble at full blast. It’s the lower-priced option too, $499.95 against $1499.99.
Choose the Sony ULT Tower Max for AudioTribe measured 110.6dBC at roughly 6m outdoors with Flat EQ and: Watch for: the same comparison found it 1.2dB behind the JBL in A-weighted loudness and weaker below 40Hz. It’s the pricier of the two, $1499.99 versus $499.95.
Buy the JBL Partybox Stage 320 at $499.95 if you want a party speaker. Buy the Sony ULT Tower Max at $1499.99 if you want a large party speaker instead.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| JBL Partybox Stage 320 | Sony ULT Tower Max | |
|---|---|---|
| Price | $499.95 | $1,499.99 |
| Ranked | #3 of 39 in Party Size Portable Bluetooth Speakers | #1 of 12 in Large Party Size Portable Bluetooth Speakers |
| App | Yes | Yes (Sony Sound Connect) |
| Aux Input | Yes | RCA input |
| Battery Life | 18 hours (Manufacturer specified) | No Battery |
| Bluetooth Codecs | SBC | SBC, AAC, LDAC |
| Bluetooth Version | 5.4 | 5.3 |
| Drivers | 2x 6.5" woofers, 2x 25mm tweeters | 9 drivers: 3x 11" woofer (2 front, 1 rear), 2x 4.7" midrange, 2x 1" tweeter, 2x 1.6" rear tweeter |
| EQ | Yes (5 band) | Yes (10 band; ULT1 / ULT2 / Flat / Live) |
| Guitar Input | Yes | No |
| IP Rating | IPX4 | Splashproof top surface |
| Microphone Input | Yes (Karaoke mode with echo effect) | Yes (6.3mm) |
| Party Mode | Yes (Auracast) | Yes (Party Chain) |
| Power Bank | Yes (USB-A, 5V/2.1A) | Yes (USB charging) |
| Power Input | AC Power cord | AC 120-240V, 50/60Hz |
| Removable Battery | Yes | No |
| Stereo | Partially | Yes |
| Omnidirectional | No | Yes (360 degree Party Sound) |
| TWS | Yes | Yes (Stereo Pair) |
| USB Playback | Yes | Yes (USB-A) |
| Weight | 36.4 lbs (16.5 kg) | 124.1 lbs (56.3 kg) |
| Amplifier Power | 240W | 2,150W (manufacturer specified) |
| Digital Aux Input | No | No |
| Lights | Yes | Yes |
| Wheels | Yes | Yes |
| Built-in Microphone | - | No |
| Dimensions | - | 21" x 41.8" x 18.6" (534 x 1062 x 472 mm) |
| Wi-Fi | - | No |
Related Speaker Comparisons
More top alternatives to JBL Partybox Stage 320:
- 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
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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 |
| 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
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