Yeahbox Sonic Boom Ultra Review: Ranked #11 of 99

Last updated: October 14, 2026

The Yeahbox Sonic Boom Ultra ranks #11 out of 99 total Boombox Size Portable Bluetooth Speakers for sound quality. See all Portable Bluetooth rankings for every top pick.

Brand: Yeahbox

Prices on this page were last checked October 14, 2026 at 2:38 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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Yeahbox Sonic Boom Ultra - ranked #11 of 99 Boombox Size Portable Bluetooth Speakers · Editor's rating 4.2/5
Check price at Amazon ($349.20) →Lowest price tracked since Aug 2026 ↓ price history

#11 Yeahbox Sonic Boom Ultra: $349.20 Amazon $349.20 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 $349. Most of the sound-quality coverage comes from enthusiast listening-test comparisons rather than independent measurement.

ReleasedJun 2026 (4 months ago)
Amplifier Power320W RMS / 500W Peak
AppYes
Aux InputYes
Battery Capacity45000mAh (Reviewer estimated)
Battery Life24 hours (Manufacturer specified)
BluetoothYes
Bluetooth CodecsSBC (inferred; additional codecs unverified)
Bluetooth Version6.0
Digital Aux InputNo
Dimensions23.4” x 9.8” x 12.3” (595 x 248 x 313 mm)
Drivers6x9in racetrack woofer (200W) + 2x 4.5in midrange (40W each) + 2x tweeters (20W each), true 3-way
EQYes (Country, Classic, and custom app EQ; custom settings don’t persist after the app closes)
IP RatingIPX6
InputsHDMI ARC (in/out, usable as a TV soundbar), AUX in/out, USB drive, microSD, optional wired mic
LightsYes
MicroSD PlaybackYes
OmnidirectionalNo
Party ModeNo (TWS stereo pairing of 2 units only, no Auracast)
Power InputUSB-C (60W fast charging)
StereoYes
StrapNo
TWSYes
USB PlaybackYes
Weight24.3 lbs (11 kg)
Check current price at Amazon ($349.20) →Search eBay for Yeahbox Sonic Boom Ultra →

Price history

$349.20$388Aug 30, 2026 to Sep 10, 2026: $388Sep 10, 2026 to Sep 18, 2026: $349.20Sep 18, 2026 to Oct 9, 2026: $388Oct 9, 2026 to Oct 14, 2026: $349.20Aug 2026Today

$349.20 is the lowest price we have tracked since Aug 2026.

Head-to-Head Comparisons

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