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 Boombox 3 Wifi ranks #26, rated 3.8/5, and costs $389.95, which makes this an easy call rather than a real tradeoff.
The Yeahbox Sonic Boom Ultra is the better-sounding pick. A massively loud boombox with deep bass, long battery life, and HDMI ARC so it can double as a TV soundbar. It has an adjustable EQ, which the JBL Boombox 3 Wifi lacks. 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.
The JBL Boombox 3 Wifi is the lighter choice. A big, waterproof stereo boombox with Wi-Fi, a long battery and enough volume for any outdoor party. At 14.6 lbs (6.6 kg) it weighs much less than the Yeahbox Sonic Boom Ultra at 24.3 lbs (11 kg). The tradeoff: Bass boosted.
Buy the Yeahbox Sonic Boom Ultra. It is rated higher for sound quality than the JBL Boombox 3 Wifi and costs less, which makes it the one to get unless you need something the other one does better.
Looking for alternatives? See the complete Portable Bluetooth rankings.
A massively loud boombox with deep bass, long battery life, and HDMI ARC so it can double as a TV soundbar.
A big, waterproof stereo boombox with Wi-Fi, a long battery and enough volume for any outdoor party.
Prices on this page were last checked October 31, 2026 at 7:11 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
| Yeahbox Sonic Boom Ultra | JBL Boombox 3 Wifi | |
|---|---|---|
| Price | $388.00 | $389.95 |
| Ranked | #11 of 112 in Boombox Size Portable Bluetooth Speakers | #26 of 112 in Boombox Size Portable Bluetooth Speakers |
| App | Yes | No |
| Aux Input | Yes | Yes |
| Battery Capacity | 45000mAh (Reviewer estimated) | - |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 6.0 | 5.3 |
| Dimensions | 23.4” x 9.8” x 12.3” (595 x 248 x 313 mm) | 19.1” x 10.1” x 7.9” (484 x 256 x 200 mm) |
| Drivers | 6x9in racetrack woofer (200W) + 2x 4.5in midrange (40W each) + 2x tweeters (20W each), true 3-way | 1x 189mm subwoofer + 2x 81mm woofers + 2x 20mm tweeters |
| EQ | Yes (Country, Classic, and custom app EQ; custom settings don’t persist after the app closes) | No |
| Inputs | HDMI ARC (in/out, usable as a TV soundbar), AUX in/out, USB drive, microSD, optional wired mic | - |
| IP Rating | IPX6 | IP67 |
| MicroSD Playback | Yes | - |
| Amplifier Power | 320W RMS / 500W Peak | 200W AC / 140W battery |
| Party Mode | No (TWS stereo pairing of 2 units only, no Auracast) | No |
| Power Input | USB-C (60W fast charging) | AC Power cable |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| USB Playback | Yes | No |
| Weight | 24.3 lbs (11 kg) | 14.6 lbs (6.6 kg) |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) | SBC |
| Lights | Yes | - |
| Battery Life | 24 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Strap | No | No |
| Bass Extension (-10dB) | - | 43Hz |
| Maximum SPL | - | 111dB (measured by Alan Ross Reviews) |
| Power Bank | - | Yes (USB-A, 5V/2A) |
| Wi-Fi | - | Yes |
| Built-in Microphone | - | No |
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