These are not really the same size class, and that is the honest framing here. The JBL Xtreme 3 ranks #18 of 120 large speakers by sound quality at $269.95; the Yeahbox Sonic Boom Ultra ranks #11 of 113 boombox speakers by sound quality at $388.
The JBL Xtreme 3 is the lighter choice. A loud, waterproof stereo speaker with deep bass, balanced sound and a power bank for charging devices. At 4 lbs (1.83 kg) it weighs much less than the Yeahbox Sonic Boom Ultra at 24.3 lbs (11 kg). It links with other speakers (PartyBoost up to 100 speakers), which the Yeahbox Sonic Boom Ultra cannot. Watch for: Boosted bass.
The Yeahbox Sonic Boom Ultra is the longer-running choice. 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 15 for the JBL Xtreme 3. It has an adjustable EQ, which the JBL Xtreme 3 lacks. 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 Xtreme 3 ($269.95) for a large speaker; the Yeahbox Sonic Boom Ultra ($388) suits a boombox speaker instead.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
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 Xtreme 3 | Yeahbox Sonic Boom Ultra | |
|---|---|---|
| Price | $269.95 | $388.00 |
| Ranked | #18 of 120 in Large Size Portable Bluetooth Speakers | #11 of 113 in Boombox Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | 53Hz | - |
| Battery Life | 15 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Bluetooth Latency | 133ms | - |
| Maximum SPL | 105dB (measured by Alan Ross Reviews) | - |
| Party Mode | Yes (PartyBoost up to 100 speakers) | No (TWS stereo pairing of 2 units only, no Auracast) |
| Power Bank | Yes (USB-A + USB-C) | - |
| Power Input | USB-C | USB-C (60W fast charging) |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 4 lbs (1.83 kg) | 24.3 lbs (11 kg) |
| App | No | Yes |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC (inferred; additional codecs unverified) |
| Built-in Microphone | Yes | - |
| EQ | No | Yes (Country, Classic, and custom app EQ; custom settings don’t persist after the app closes) |
| IP Rating | IPX7 | IPX6 |
| Bluetooth Version | 4.1 | 6.0 |
| Dimensions | 11.7” x 5.4” x 5.3” (298 x 136 x 134 mm) | 23.4” x 9.8” x 12.3” (595 x 248 x 313 mm) |
| Drivers | 2x 70mm woofers, 2x 20mm tweeters | 6x9in racetrack woofer (200W) + 2x 4.5in midrange (40W each) + 2x tweeters (20W each), true 3-way |
| Frequency Response | 53.5Hz - 20kHz (Manufacturer specified) | - |
| Amplifier Power | 100W | 320W RMS / 500W Peak |
| 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 |
| USB Playback | - | Yes |
| Lights | - | Yes |
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