Different classes, so treat this as a step-up-or-not question rather than a head-to-head. The Yeahbox Sonic Boom Ultra ranks #11 of 113 boombox speakers by sound quality at $388; the Onn XL Wireless Party Speaker ranks #11 of 53 party speakers by sound quality at $249.
The Yeahbox Sonic Boom Ultra is the longer-running, lighter option. 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 16 for the Onn XL Wireless Party Speaker. At 24.3 lbs (11 kg) it weighs much less than the Onn XL Wireless Party Speaker at 44 lbs (19.96 kg). It is rated IPX6 against IPX4 for the Onn XL Wireless Party Speaker. Watch for: 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 case for the Onn XL Wireless Party Speaker: A loud wheeled karaoke party speaker with punchy bass, two included wireless mics, and guitar inputs at a reasonable price. The catch: Sound favors punch and a forward/bright top end over refinement.
Buy the Yeahbox Sonic Boom Ultra ($388) for a boombox speaker; the Onn XL Wireless Party Speaker ($249) suits a party speaker instead.
Looking for alternatives? See the complete Portable Bluetooth rankings.
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
| Yeahbox Sonic Boom Ultra | Onn XL Wireless Party Speaker | |
|---|---|---|
| Price | $388.00 | $249.00 |
| Ranked | #11 of 113 in Boombox Size Portable Bluetooth Speakers | #11 of 53 in Party Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Aux Input | Yes | Yes |
| Battery Capacity | 45000mAh (Reviewer estimated) | - |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 6.0 | - |
| Dimensions | 23.4” x 9.8” x 12.3” (595 x 248 x 313 mm) | 30.1”H x 15.7”W x 15.5”D (765.0 x 400.0 x 392.9 mm) |
| Drivers | 6x9in racetrack woofer (200W) + 2x 4.5in midrange (40W each) + 2x tweeters (20W each), true 3-way | Dual 8” (203mm) woofers + dual 2” (51mm) tweeters |
| EQ | Yes (Country, Classic, and custom app EQ; custom settings don’t persist after the app closes) | Yes |
| Inputs | HDMI ARC (in/out, usable as a TV soundbar), AUX in/out, USB drive, microSD, optional wired mic | - |
| IP Rating | IPX6 | IPX4 |
| MicroSD Playback | Yes | - |
| Amplifier Power | 320W RMS / 500W Peak | 240W |
| Party Mode | No (TWS stereo pairing of 2 units only, no Auracast) | - |
| Power Input | USB-C (60W fast charging) | AC Power cord |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| USB Playback | Yes | - |
| Weight | 24.3 lbs (11 kg) | 44 lbs (19.96 kg) |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) | SBC (inferred; additional codecs unverified) |
| Lights | Yes | Yes |
| Battery Life | 24 hours (Manufacturer specified) | 16 hours (Manufacturer specified) |
| Strap | No | No |
| Microphone Input | - | Yes (2 inputs, karaoke mode) |
| Wireless Microphones | - | Yes 2 Included |
| Guitar Input | - | Yes |
| Power Bank | - | Yes (USB-A) |
| Removable Battery | - | No |
| Wheels | - | Yes |
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