Short answer: the Partybox Ultimate, and its own competitor’s review agrees. It ranks #1 of 11 large party speakers at $1,499.95. The Soundboks 4 ranks #23 of 45 in the larger party class at $1,000, $500 less, and its own cons state it isn’t as neutral or as deep in bass as the above Partyboxes.
The Soundboks 4 is tied for the loudest battery-powered speaker on the site, with a removable 40-hour battery, but it isn’t stereo and charges from an external power brick rather than a standard cable.
The Partybox Ultimate’s claim is specific: the absolute deepest bass of any Bluetooth speaker here, alongside the same handle, wheels, and lightshow convenience the rest of the Partybox line offers.
Buy the Partybox Ultimate if the price gap is acceptable for the top spot. Buy the Soundboks 4 to save $500, understanding our notes rank it below the JBL flagships on bass and neutrality.
Specifications Side By Side
| JBL Partybox Ultimate | Soundboks 4 | |
|---|---|---|
| Price | $1,499.95 | $1000 |
| Ranked | #1 of 10 in Large Party Size Portable Bluetooth Speakers | #23 of 44 in Party Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Aux Input | Yes | Yes |
| Battery Life | No Battery | 40 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC | SBC |
| EQ | Yes (3 band) | Yes |
| Guitar Input | Yes | Yes |
| IP Rating | IPX4 | IP65 |
| Microphone Input | Yes | Yes |
| Power Bank | Yes | No |
| Power Input | AC Power cord | AC Power cord |
| TWS | Yes | Yes |
| USB Playback | Yes | No |
| Weight | 86 lbs / 39 kg | 34 lbs / 15.4 kg |
| Wifi | Yes | - |
| Built in Microphone | No | - |
| Party Mode | Yes | Yes |
| Stereo | Yes | Yes |
| Bluetooth Version | 5.3 | 5.0 |
| Dimensions | 17.9" x 41.3" x 17.3" (455 x 1049 x 440 mm) | 25.6" x 17" x 13" (650.2 x 431.8 x 330.2 mm) |
| Drivers | 2x 9" subwoofer, 2x 4.5" midrange, 2x 2.75" tweeter | 2x 10" woofers, 1" compression driver |
| Output Power | 1100W | 3 x 72W |
| Bass Extension (-10dB) | - | 52Hz |
| Frequency Response | - | 40Hz - 20kHz (Manufacturer specified) |
| Max Volume | - | 126dB |
| Removable Battery | - | Yes |
| SKAA | - | Yes |
The Two Speakers In Full
JBL Partybox Ultimate: $1,499.95 Amazon Bhphotovideo
Pros: Absolute deepest bass of any Bluetooth speaker. Handle and wheels are convenient. Very nice lightshow ability.
Cons: Very large and heavy. No battery. Note, JBL daisychain is not compatible with any other non-JBL speaker and is possibly a fully digital signal.
| App | Yes |
|---|---|
| Aux Input | Yes |
| Battery Life | No Battery |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.3 |
| Built in Microphone | No |
| Dimensions | 17.9" x 41.3" x 17.3" (455 x 1049 x 440 mm) |
| Drivers | 2x 9" subwoofer, 2x 4.5" midrange, 2x 2.75" tweeter |
| EQ | Yes (3 band) |
| Guitar Input | Yes |
| IP Rating | IPX4 |
| Microphone Input | Yes |
| Output Power | 1100W |
| Party Mode | Yes |
| Power Bank | Yes |
| Power Input | AC Power cord |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 86 lbs / 39 kg |
| Wifi | Yes |
- Reviews, Comparisons and Sound Samples
- GYMCADDY: JBL Partybox Ultimate Vs SOUNDBOKS 4 & Sony XV900 - Is It Worth It?
- GYMCADDY: JBL Partybox Ultimate Vs Partybox 710 - They’re Both Crazy, But There Is A Clear Winner
- Flossy Carter: JBL PartyBox Ultimate VS JBL PartyBox 1000 - Which Speaker is The BEST?
- GYMCADDY: JBL Partybox 720 Vs JBL Partybox Ultimate
- GYMCADDY: Sony ULT Tower 10 Vs JBL Partybox Ultimate & JBL Partybox 710
- Head-to-Head Comparisons
- Links
Soundboks 4: $1000 Amazon
Pros: Tied for the loudest battery powered speaker. Removable 40 hour battery.
Cons: Very large. Not as neutral or as deep of bass as the above Partyboxes. Not stereo. External power brick for charging.
| App | Yes |
|---|---|
| Aux Input | Yes |
| Bass Extension (-10dB) | 52Hz |
| Battery Life | 40 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.0 |
| Dimensions | 25.6" x 17" x 13" (650.2 x 431.8 x 330.2 mm) |
| Drivers | 2x 10" woofers, 1" compression driver |
| EQ | Yes |
| Frequency Response | 40Hz - 20kHz (Manufacturer specified) |
| Guitar Input | Yes |
| IP Rating | IP65 |
| Max Volume | 126dB |
| Microphone Input | Yes |
| Output Power | 3 x 72W |
| Party Mode | Yes |
| Power Bank | No |
| Power Input | AC Power cord |
| Removable Battery | Yes |
| SKAA | Yes |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | No |
| Weight | 34 lbs / 15.4 kg |
- Reviews, Comparisons and Sound Samples
- Links
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Product prices and availability were last checked August 9, 2026 at 6:57 AM UTC 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.