Short answer: the JBL Partybox Ultimate 2. It ranks #7 of 13 large party speakers by sound quality (rated 4.7/5) and is still sold new; the Sony SRS-XV900 ranks #12 (rated 3.7/5) and is discontinued, so it is only an option used.
The JBL Partybox Ultimate 2 is the better-sounding, tougher 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 is rated IPX4, while the Sony SRS-XV900 has no water resistance. It streams over Wi-Fi as well as Bluetooth, which the Sony SRS-XV900 cannot. Watch for: AC-only: there is no battery, so it needs mains power wherever it goes.
The Sony SRS-XV900 is the battery-powered, lighter pick. It can get slightly louder than a JBL Partybox 310. Its battery is rated for 25 hours, while the JBL Partybox Ultimate 2 needs an outlet. At 58.6 lbs (26.6 kg) it weighs much less than the JBL Partybox Ultimate 2 at 105.1 lbs (47.68 kg). It supports LDAC Bluetooth, which the JBL Partybox Ultimate 2 lacks. The tradeoff: Not as deep of bass and loses more bass at high volume compared to the Partybox 310 and every other speaker on this page.
Buy the JBL Partybox Ultimate 2. It is rated higher for sound quality, and the Sony SRS-XV900 is discontinued, so it is only available used.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| JBL Partybox Ultimate 2 | Sony SRS-XV900 | |
|---|---|---|
| Price | £1,399.00 Upcoming | $900 Discontinued |
| Ranked | #7 of 13 in Large Party Size Portable Bluetooth Speakers | #12 of 13 in Large Party Size Portable Bluetooth Speakers |
| Amplifier Power | 1500W RMS | 100W |
| App | JBL One | Yes |
| Aux Input | Yes | Yes |
| Battery Life | No Battery | 25 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC, AAC, LDAC |
| Bluetooth Version | 5.3 | 5.2 |
| Built-in Microphone | No | No |
| Digital Aux Input | No | No |
| Dimensions | 18.4” x 41.4” x 19.4” (466.7 x 1052.5 x 493.3 mm) | 16.1” x 34.6” x 17.3” (410 x 880 x 439 mm) |
| Drivers | 2x 264mm subwoofer, 2x 124mm mid-range, 2x 30mm horn-loaded tweeter | 9 drivers: 1x 12.6”x12.6” woofer, 2x 4.7” midrange, 2x 2” front tweeter, 2x 1.6” side tweeter, 2x 1.6” rear tweeter |
| EQ | Yes (Smart EQ Mode) | Yes |
| Frequency Response | 28Hz - 20kHz (-6dB) | - |
| Guitar Input | Yes | Yes |
| IP Rating | IPX4 | None |
| Lights | Yes | Yes |
| Microphone Input | Yes (EasySing AI vocal removal) | Yes (Karaoke mode with echo effect) |
| Omnidirectional | No | No |
| Optical Input | Yes | - |
| Party Mode | Yes (Auracast) | Yes (Party Connect up to 100 speakers) |
| Power Bank | Yes (USB-C PD, up to 20V/1.5A) | Yes (USB-A) |
| Power Input | AC Power cord | AC Power cord |
| Stereo | Yes | Yes |
| Strap | No | No |
| Streaming Services | AirPlay 2, Chromecast, Spotify Connect | - |
| TWS | Yes | Yes |
| USB Playback | Yes | Yes |
| Weight | 105.1 lbs (47.68 kg) | 58.6 lbs (26.6 kg) |
| Wi-Fi | Yes | No |
| Wheels | Yes | Yes |
| Inputs | - | Optical |
| Removable Battery | - | No |
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
- JBL Partybox Ultimate 2 vs JBL Partybox 710
- JBL Partybox Ultimate 2 vs JBL Partybox 720
- JBL Partybox Ultimate 2 vs Sony ULT Tower 9
- JBL Partybox Ultimate 2 vs Teufel Rockster 2
- 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
Sony SRS-XV900: $900 Discontinued eBay
Newer model: the Sony ULT Tower 9, ranked higher, rated 4.2/5.
Pros: It can get slightly louder than a JBL Partybox 310. Nine drivers, including side and rear tweeters, spread sound around the room, and it adds a battery rated for 25 hours, LDAC and AAC Bluetooth, an optical input, mic and guitar inputs and Party Connect linking. A handle and wheels make the 26.6 kg cabinet easy to move.
Cons: Not as deep of bass and loses more bass at high volume compared to the Partybox 310 and every other speaker on this page. Discontinued; Sony replaced the XV line with the ULT Tower series.
Full Sony SRS-XV900 review and specifications →
| Amplifier Power | 100W |
|---|---|
| App | Yes |
| Aux Input | Yes |
| Battery Life | 25 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC, AAC, LDAC |
| Bluetooth Version | 5.2 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 16.1” x 34.6” x 17.3” (410 x 880 x 439 mm) |
| Drivers | 9 drivers: 1x 12.6”x12.6” woofer, 2x 4.7” midrange, 2x 2” front tweeter, 2x 1.6” side tweeter, 2x 1.6” rear tweeter |
| EQ | Yes |
| Guitar Input | Yes |
| IP Rating | None |
| Inputs | Optical |
| Lights | Yes |
| Microphone Input | Yes (Karaoke mode with echo effect) |
| Omnidirectional | No |
| Party Mode | Yes (Party Connect up to 100 speakers) |
| Power Bank | Yes (USB-A) |
| Power Input | AC Power cord |
| Removable Battery | No |
| Stereo | Yes |
| Strap | No |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 58.6 lbs (26.6 kg) |
| Wheels | Yes |
| Wi-Fi | No |
- Links
- Reviews, Comparisons and Sound Samples
- Jay’s Straight Up Reviews & More: Sony SRS-XV900 vs JBL Partybox 310 - Can the JBL Middleweight 💪🏽 Compete With The Sony Heavyweight? More from JaysStraightUpReviews →
- Jay’s Straight Up Reviews & More: JBL Partybox 710 ☣️ vs Sony SRS XV900 ☢️- Basement Brawl Speaker Comparison. Can XV900 Top the 710❓
- GYMCADDY: Sony XV900 Review - Finally, A Good Speaker From Sony! More from GYMCADDY →
- Head-to-Head Comparisons
- Sony SRS-XV900 vs Sony ULT Tower 10
- Sony SRS-XV900 vs Marshall Bromley 750
- Sony SRS-XV900 vs Sony ULT Tower 9
- Sony SRS-XV900 vs Teufel Rockster
- Sony SRS-XV900 vs JBL Partybox 520
- Sony SRS-XV900 vs JBL Partybox 710
- Sony SRS-XV900 vs JBL Partybox 720
- Sony SRS-XV900 vs Teufel Rockster 2
- See all 17 comparisons