Short answer: the Yeahbox Sonic Boom Ultra. It ranks #11 of 112 boombox speakers by sound quality, rated 4.2/5, at $388. The JBL Partybox On the Go ranks #66, rated 3.0/5, at $249.95, $138.05 cheaper, not enough of a saving to outweigh the sound-quality gap.
The Sonic Boom Ultra is the much bigger, louder speaker. A 6x9-inch racetrack woofer, two midranges and two tweeters reach audible bass to around 30Hz and play 106 to 107dB, it claims 24 hours of battery, and HDMI ARC lets it double as a TV speaker. It weighs 24.3 lbs (11 kg) and gets noisy near full volume.
The PartyBox On the Go is built around its wireless mic. A wireless microphone comes in the box, and a 5.1-inch woofer with tweeters reaches about 49Hz before falling 10dB. Its battery is rated for only 6 hours, JBL rates it at 94dB, and it has no EQ. It charges over USB-C and weighs 16.5 lbs (7.5 kg).
Buy the Yeahbox Sonic Boom Ultra. It is rated higher for sound quality, and saving $138.05 with the JBL Partybox On the Go does not make up for the sound-quality gap.
Looking for alternatives? See the complete Portable Bluetooth rankings.
A battery party speaker with an included wireless microphone and a detachable shoulder strap.
A massively loud boombox with deep bass, long battery life, and HDMI ARC so it can double as a TV soundbar.
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Specifications Side By Side
| JBL Partybox On the Go | Yeahbox Sonic Boom Ultra | |
|---|---|---|
| Price | $249.95 | $388.00 |
| Ranked | #66 of 112 in Boombox Size Portable Bluetooth Speakers | #11 of 112 in Boombox Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | 49Hz | - |
| Battery Life | 6 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| IP Rating | IPX4 | IPX6 |
| Power Bank | Yes (USB-A, 5V/2.1A) | - |
| Stereo | Partially | Yes |
| Omnidirectional | No | No |
| USB Playback | Yes | Yes |
| Weight | 16.5 lbs (7.5 kg) | 24.3 lbs (11 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC (inferred; additional codecs unverified) |
| App | Yes (JBL PartyBox app) | Yes |
| EQ | No | Yes (Country, Classic, and custom app EQ; custom settings don’t persist after the app closes) |
| TWS | Yes | Yes |
| Party Mode | No | No (TWS stereo pairing of 2 units only, no Auracast) |
| Built-in Microphone | No | - |
| Power Input | USB-C | USB-C (60W fast charging) |
| Bluetooth Version | 4.2 | 6.0 |
| Amplifier Power | 100W | 320W RMS / 500W Peak |
| Dimensions | 19.3” x 8.8” x 9.6” (489 x 224 x 244.5 mm) | 23.4” x 9.8” x 12.3” (595 x 248 x 313 mm) |
| Drivers | 5.1” woofer + tweeters | 6x9in racetrack woofer (200W) + 2x 4.5in midrange (40W each) + 2x tweeters (20W each), true 3-way |
| Maximum SPL | 94dB (Manufacturer specified) | - |
| Digital Aux Input | No | No |
| Strap | Yes (detachable shoulder strap) | 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 |
| Lights | - | Yes |
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