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 53 party speakers by sound quality at $399.95; the Yeahbox Sonic Boom Ultra ranks #11 of 113 boombox speakers by sound quality at $388.
The case for the JBL Partybox Club 120: A party speaker on wheels with quite neutral sound, a removable battery, and mic and guitar inputs. It links with other speakers (Auracast), which the Yeahbox Sonic Boom Ultra cannot. The catch: High price, and JBL’s wired daisy chain only works with other JBL speakers.
The Yeahbox Sonic Boom Ultra is the longer-running, tougher pick. A massively loud boombox with deep bass, long battery life, and HDMI ARC so it can double as a TV soundbar. It is rated for 24 hours of battery against 12 for the JBL Partybox Club 120. It is rated IPX6 against IPX4 for the JBL Partybox Club 120. The tradeoff: 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 $399.95 for a party speaker, or the Yeahbox Sonic Boom Ultra at $388 for a boombox speaker instead.
Want more options? Browse the full Portable Bluetooth rankings.
Prices on this page were last checked November 7, 2026 at 7:34 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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Specifications Side By Side
| JBL Partybox Club 120 | Yeahbox Sonic Boom Ultra | |
|---|---|---|
| Price | $399.95 | $388.00 |
| Ranked | #6 of 53 in Party Size Portable Bluetooth Speakers | #11 of 113 in Boombox Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Aux Input | Yes | Yes |
| Battery Life | 12 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| 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 |
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