Different classes, so treat this as a step-up-or-not question rather than a head-to-head. The JBL Partybox Club 120 ranks #6 of 40 party speakers by sound quality at $449.95; the Yeahbox Sonic Boom Ultra ranks #11 of 76 boombox speakers by sound quality at $388.
The case for the JBL Partybox Club 120: JBL Partybox Club 120 uses 2x 5.25” woofers, 2x 2.25” tweeters. The tradeoff: Its 40Hz - 20kHz (Manufacturer specified) specification points to limited deep-bass reach for the cabinet size.
What the Yeahbox Sonic Boom Ultra does well: By far the loudest boombox tested against it, hitting 106-107dB, roughly 3-5dB louder than the JBL Boombox 4, Zealot ZE41, Tribit Stormbox Blast 2, W-King X20, and Hopestar A90/A95. The catch: The 500W peak-power rating doesn’t fully hold up: it gets noisy above roughly 80-90% volume, and the midrange isn’t fully refined, sometimes sitting a touch too forward.
Buy the JBL Partybox Club 120 at $449.95 for a party speaker, or the Yeahbox Sonic Boom Ultra at $388 for a boombox speaker instead.
If battery life is a priority, the Yeahbox Sonic Boom Ultra is rated for 24 hours versus 12 hours for the JBL Partybox Club 120.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| JBL Partybox Club 120 | Yeahbox Sonic Boom Ultra | |
|---|---|---|
| Price | $449.95 | $388.00 |
| Ranked | #6 of 40 in Party Size Portable Bluetooth Speakers | #11 of 76 in Boombox Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Aux Input | Yes | Yes |
| Battery Life | 12 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC | SBC (inferred; additional codecs unverified) |
| Bluetooth Version | 5.4 | 6.0 |
| Charging Time | 3.5 hours | - |
| Drivers | 2x 5.25” woofers, 2x 2.25” tweeters | 6x9in racetrack woofer (200W) + 2x 4.5in midrange (40W each) + 2x tweeters (20W each), true 3-way |
| EQ | Yes (5 band) | Yes (Country, Classic, and custom app EQ; custom settings don’t persist after the app closes) |
| Frequency Response | 40Hz - 20kHz (Manufacturer specified) | - |
| Guitar Input | Yes | - |
| IP Rating | IPX4 | IPX6 |
| Microphone Input | Yes (Karaoke mode with echo effect) | - |
| Party Mode | Yes (Auracast) | No (TWS stereo pairing of 2 units only, no Auracast) |
| Power Bank | Yes (USB-A, 5V/2.1A) | - |
| Power Input | AC Power cord | USB-C (60W fast charging) |
| Removable Battery | Yes | - |
| Stereo | Partially | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| USB Playback | Yes | Yes |
| Weight | 23.8 lbs (10.8 kg) | 24.3 lbs (11 kg) |
| Amplifier Power | 160W | 320W RMS / 500W Peak |
| Digital Aux Input | No | No |
| Lights | Yes | Yes |
| Dimensions | 22.4”H x 11.4”W x 11.7”D (570 x 288.4 x 297 mm) | 23.4” x 9.8” x 12.3” (595 x 248 x 313 mm) |
| Strap | No | No |
| Battery Capacity | - | 45000mAh (Reviewer estimated) |
| Inputs | - | HDMI ARC (in/out, usable as a TV soundbar), AUX in/out, USB drive, microSD, optional wired mic |
| MicroSD Playback | - | Yes |
Related Speaker Comparisons
How Yeahbox Sonic Boom Ultra compares with other leading options:
- Yeahbox Sonic Boom Ultra vs Tribit Stormbox Blast
- JBL Partybox Encore 2 vs Yeahbox Sonic Boom Ultra
- JBL Partybox Encore Essential 2 vs Yeahbox Sonic Boom Ultra
- Yeahbox Sonic Boom Ultra vs JBL Partybox Encore
- JBL Partybox Encore Essential vs Yeahbox Sonic Boom Ultra
Prices on this page were last checked September 26, 2026 at 11:14 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 Club 120: $449.95 Amazon eBay
Older models: the JBL Partybox 110 (rated 4.4/5) and the JBL Partybox 100 (rated 4.4/5).
Pros: JBL Partybox Club 120 uses 2x 5.25” woofers, 2x 2.25” tweeters. Its 10.8 kg, claimed 12 hours (Manufacturer specified) battery life, IPX4 protection, aux input and limited-stereo playback make it a practical option for its intended room or portable use. Handle and wheels, customizable lighting, and quite neutral sound with deeper bass than the Partybox 100 and 110.
Cons: Its 40Hz - 20kHz (Manufacturer specified) specification points to limited deep-bass reach for the cabinet size. High price, and JBL’s wired daisy chain only works with other JBL speakers.
Full JBL Partybox Club 120 review and specifications →
| Amplifier Power | 160W |
|---|---|
| App | Yes |
| Aux Input | Yes |
| Battery Life | 12 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.4 |
| Charging Time | 3.5 hours |
| Digital Aux Input | No |
| Dimensions | 22.4”H x 11.4”W x 11.7”D (570 x 288.4 x 297 mm) |
| Drivers | 2x 5.25” woofers, 2x 2.25” tweeters |
| EQ | Yes (5 band) |
| Frequency Response | 40Hz - 20kHz (Manufacturer specified) |
| 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 |
| Strap | No |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 23.8 lbs (10.8 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Joy & Oluv’Sone: JBL Partybox Club 120 vs 130 - really worth the upgrade? More from Oluv’Sone →
- HammoTech Reviews: JBL Partybox Club 120 Vs Partybox 110 - Worth the upgrade?
- Jay’s Straight Up Reviews & More: JBL Partybox Club 120 vs 110 🥳 A Family Feud! Battery Powered🔋Bluetooth Party Speakers Face-Off🤬 More from JaysStraightUpReviews →
- Williston Audio Labs: Investigating the JBL PartyBox Club 120 More from Williston Audio Labs →
- M1MTechChannel: Welche JBL Partybox ist die BESTE ? Alle Partyboxen im Vergleich | 2026 More from M1MTechChannel →
- Head-to-Head Comparisons
- JBL Partybox Club 120 vs JBL Partybox 130
- JBL Partybox Club 120 vs Sony ULT Tower 5
- JBL Partybox Club 120 vs JBL Partybox 100
- JBL Partybox Club 120 vs JBL Partybox 310
- JBL Partybox Club 120 vs JBL Partybox 110
- JBL Partybox Club 120 vs JBL Partybox Stage 320
- JBL Partybox Club 120 vs JBL Partybox 330
- JBL Partybox Club 120 vs JBL Partybox 300
- See all 51 comparisons
Yeahbox Sonic Boom Ultra: $388.00 Amazon eBay
Pros: By far the loudest boombox tested against it, hitting 106-107dB, roughly 3-5dB louder than the JBL Boombox 4, Zealot ZE41, Tribit Stormbox Blast 2, W-King X20, and Hopestar A90/A95. The massive 6x9in racetrack woofer reaches audible bass down to around 30Hz on the Country EQ preset, and a teardown confirmed genuinely robust internals: a thick vented voice coil and a dedicated crossover output per driver. HDMI ARC input/output lets it double as a TV soundbar, a feature none of its direct competitors offer.
Cons: The 500W peak-power rating doesn’t fully hold up: it gets noisy above roughly 80-90% volume, and the midrange isn’t fully refined, sometimes sitting a touch too forward. The custom EQ in the app noticeably reduces bass output compared to the factory presets and doesn’t persist after the speaker powers off. No Auracast, no removable battery, a plastic handle with some flex, and heavy at 11kg (24lb) for $388. Most of the sound-quality coverage comes from enthusiast listening-test comparisons rather than independent measurement.
Full Yeahbox Sonic Boom Ultra review and specifications →
| Amplifier Power | 320W RMS / 500W Peak |
|---|---|
| App | Yes |
| Aux Input | Yes |
| Battery Capacity | 45000mAh (Reviewer estimated) |
| Battery Life | 24 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) |
| Bluetooth Version | 6.0 |
| Digital Aux Input | No |
| Dimensions | 23.4” x 9.8” x 12.3” (595 x 248 x 313 mm) |
| Drivers | 6x9in racetrack woofer (200W) + 2x 4.5in midrange (40W each) + 2x tweeters (20W each), true 3-way |
| EQ | Yes (Country, Classic, and custom app EQ; custom settings don’t persist after the app closes) |
| IP Rating | IPX6 |
| Inputs | HDMI ARC (in/out, usable as a TV soundbar), AUX in/out, USB drive, microSD, optional wired mic |
| Lights | Yes |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Party Mode | No (TWS stereo pairing of 2 units only, no Auracast) |
| Power Input | USB-C (60W fast charging) |
| Stereo | Yes |
| Strap | No |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 24.3 lbs (11 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Jagist reviews: Yeahbox Sonic Boom Ultra Vs Zealot Ze41!!! Battle Of Big Boys!!! 😜😜😜 More from Jagistreviews →
- Jagist reviews: Yeahbox Sonic Boom Ultra Vs Zealot Ze21!!! Battle Of The Deep Bass 🥳🥳🥳
- Jagist reviews: Yeahbox Sonic Boom Ultra Vs W-king X20!!! Old Vs New!!! 🫨🫨🫨
- Techder Audios: YEAHBOX Sonic Boom Ultra VS JBL Boombox 4 "IT BEATS THE KING!?😈😱" More from techderaudios →
- Jagist reviews: Yeahbox Sonic Boom Ultra Vs Tribit Stormbox Blast 2 Firmware 11!!! Holy Crap!!! 🤩🤩🤩
- Jagist reviews: Yeahbox Sonic Boom Ultra Vs Hopestar A95!!! Battle Of Big Boys!!!! 😘😘😘
- Jagist reviews: Yeahbox Sonic Boom Ultra!!! 💥 Unboxing And Review!!! Absolutely A Beast 💯 🥵🥵🥵
- Techder Audios: YEAHBOX Sonic Boom Ultra - Soundtest "DEEP SUBWOOFER LIKE PERFORMANCE!🔥"
- Audio y Mas: El Woofer Más GRANDE en un Altavoz, Yeahbox Sonic Boom Ultra
- Jagist reviews: Yeahbox Sonic Boom Ultra Bass Test!!! What A Beast!!! 😍😍😍
- brett levesque: Yeahbox sonic boom ultra hertz test
- Jagist reviews: Yeahbox Sonic Boom Ultra Hertz Test!!! How Low Will She Go??? 😛😛😛
- Head-to-Head Comparisons
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