Short answer: the Yeahbox Sonic Boom Ultra on measured sound quality, the W-King T11 on price. The Yeahbox Sonic Boom Ultra ranks #11 of 113 boombox speakers, rated 4.2/5, at $388. The W-King T11 ranks #55, rated 3.3/5, at $116.57, $271.43 cheaper.
The Yeahbox Sonic Boom Ultra is the better-sounding, longer-running pick. 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 10 for the W-King T11. 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.
The W-King T11 is the lighter option. A weather resistant party speaker with deep bass, high volume and a karaoke mic input. At 11.2 lbs (5.1 kg) it weighs much less than the Yeahbox Sonic Boom Ultra at 24.3 lbs (11 kg). The tradeoff: The tuning can sound hollow through the mids, so deep bass does not always translate to natural vocals or instruments.
Buy the Yeahbox Sonic Boom Ultra when sound quality outweighs the price for you, and the W-King T11 when the price outweighs sound quality 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
| Yeahbox Sonic Boom Ultra | W-King T11 | |
|---|---|---|
| Price | $388.00 | $116.57 |
| Ranked | #11 of 113 in Boombox Size Portable Bluetooth Speakers | #55 of 113 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) | 8.1”D x 8.6”W x 17.4” (205.7 x 219.5 x 442 mm) tall |
| Drivers | 6x9in racetrack woofer (200W) + 2x 4.5in midrange (40W each) + 2x tweeters (20W each), true 3-way | 2x 133mm (5.25”) woofers + 2x ~30mm (1.2”) tweeters + 2x passive radiators |
| EQ | Yes (Country, Classic, and custom app EQ; custom settings don’t persist after the app closes) | Yes (multiple modes) |
| 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 | 100W RMS / 240W peak |
| Party Mode | No (TWS stereo pairing of 2 units only, no Auracast) | No |
| Power Input | USB-C (60W fast charging) | AC Power brick |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| USB Playback | Yes | Yes |
| Weight | 24.3 lbs (11 kg) | 11.2 lbs (5.1 kg) |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) | SBC |
| Lights | Yes | - |
| Battery Life | 24 hours (Manufacturer specified) | 10 hours (Manufacturer specified) |
| Strap | No | - |
| Aux Latency | - | 0ms |
| Bass Extension (-10dB) | - | 43Hz |
| Bluetooth Latency | - | 66ms |
| Maximum SPL | - | 112dB (measured by Alan Ross Reviews) |
| Power Bank | - | Yes (USB-A) |
| Built-in Microphone | - | No |
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