Short answer: the Yeahbox Sonic Boom Ultra. It ranks #11 of 76 boombox speakers by sound quality, rated 4.2/5, at $388. The W-King X10-1 ranks #64, rated 2.4/5, at $143, $245 cheaper, not enough of a saving to outweigh the sound-quality gap.
Why pick the Yeahbox Sonic Boom Ultra: 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.
Why pick the W-King X10-1: 70W RMS output with 120W peak power, 108dB max volume, exceptional 42-hour battery life with power bank, IPX6 waterproof, Bluetooth 5.0 with 100ft range, EQ with indoor/outdoor modes, dual subwoofers with tweeters and passive radiators, TWS stereo pairing, MicroSD and USB playback, AUX input, built-in microphone. Watch for: Rolled off treble, not much bass.
Buy the Yeahbox Sonic Boom Ultra. It is rated higher for sound quality, and saving $245 with the W-King X10-1 does not make up for the sound-quality gap.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Yeahbox Sonic Boom Ultra | W-King X10-1 | |
|---|---|---|
| Price | $388.00 | $80.37 |
| Ranked | #11 of 76 in Boombox Size Portable Bluetooth Speakers | #64 of 76 in Boombox Size Portable Bluetooth Speakers |
| App | Yes | No |
| Aux Input | Yes | Yes |
| Battery Capacity | 45000mAh (Reviewer estimated) | - |
| Bluetooth Version | 6.0 | 5.0 |
| Dimensions | 23.4” x 9.8” x 12.3” (595 x 248 x 313 mm) | 12.4” x 5.5” x 5.3” (315 x 140 x 135 mm) |
| Drivers | 6x9in racetrack woofer (200W) + 2x 4.5in midrange (40W each) + 2x tweeters (20W each), true 3-way | 2x 3.66” (93mm) subwoofers + 2x 1.2” (31mm) neodymium tweeters + 3x passive radiators |
| EQ | Yes (Country, Classic, and custom app EQ; custom settings don’t persist after the app closes) | Yes (2 modes - Indoor/Outdoor) |
| Inputs | HDMI ARC (in/out, usable as a TV soundbar), AUX in/out, USB drive, microSD, optional wired mic | - |
| IP Rating | IPX6 | IPX6 |
| MicroSD Playback | Yes | Yes |
| Amplifier Power | 320W RMS / 500W Peak | 70W RMS (120W peak) |
| Party Mode | No (TWS stereo pairing of 2 units only, no Auracast) | No |
| Power Input | USB-C (60W fast charging) | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| USB Playback | Yes | Yes |
| Weight | 24.3 lbs (11 kg) | 6.5 lbs (2.95 kg) |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) | SBC |
| Lights | Yes | - |
| Battery Life | 24 hours (Manufacturer specified) | 42 hours (Manufacturer specified) |
| Strap | No | - |
| Bass Extension (-10dB) | - | 63Hz |
| Maximum SPL | - | 108dB (measured by Alan Ross Reviews) |
| Power Bank | - | Yes (USB-A) |
| Built-in Microphone | - | 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
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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- Yeahbox Sonic Boom Ultra vs Harman Kardon Onyx Studio 6
- Yeahbox Sonic Boom Ultra vs JBL Partybox Encore Essential
- Yeahbox Sonic Boom Ultra vs Harman Kardon Onyx Studio 7
- Yeahbox Sonic Boom Ultra vs Harman Kardon Onyx Studio 9
- Yeahbox Sonic Boom Ultra vs JBL Partybox Encore
- Yeahbox Sonic Boom Ultra vs JBL Partybox Encore Essential 2
- See all 58 comparisons
W-King X10-1: $80.37 Amazon AliExpress eBay
Pros: 70W RMS output with 120W peak power, 108dB max volume, exceptional 42-hour battery life with power bank, IPX6 waterproof, Bluetooth 5.0 with 100ft range, EQ with indoor/outdoor modes, dual subwoofers with tweeters and passive radiators, TWS stereo pairing, MicroSD and USB playback, AUX input, built-in microphone. Measured bass extension of 63Hz (-10dB).
Cons: Rolled off treble, not much bass.
Full W-King X10-1 review and specifications →
| Amplifier Power | 70W RMS (120W peak) |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | 63Hz |
| Battery Life | 42 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.0 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 12.4” x 5.5” x 5.3” (315 x 140 x 135 mm) |
| Drivers | 2x 3.66” (93mm) subwoofers + 2x 1.2” (31mm) neodymium tweeters + 3x passive radiators |
| EQ | Yes (2 modes - Indoor/Outdoor) |
| IP Rating | IPX6 |
| Maximum SPL | 108dB (measured by Alan Ross Reviews) |
| MicroSD Playback | Yes |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | Yes (USB-A) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 6.5 lbs (2.95 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons