Short answer: the W-King X20. It ranks #43 out of 113 boombox speakers against the Yeahbox’s #59, and it costs a bit less too, so there is little reason to consider the Yeahbox instead.
On paper the two look similar, but the X20 comes with more independent verification. Both claim 200W RMS output, with the X20 rated at 330W peak against 300W peak for the Yeahbox’s 3-way, 5-driver array. The X20’s cons are specific and measured: a rising frequency response with the upper treble rolled off and peaks around 700Hz and 1.2kHz. The Yeahbox’s cons are more fundamental, noting it’s a budget import brand with limited independent testing where specs are manufacturer-claimed, and its water resistance rating is reported inconsistently across listings, IPX6 on Yeahbox’s own site versus IP66 or IP67 elsewhere.
Feature-wise the two trade blows. The X20 adds a 7.5-inch subwoofer, a USB-A power bank function, and button-based EQ modes alongside app control. The Yeahbox counters with fast 60W USB-C charging for its 111Wh battery and a true 3-way driver layout with dedicated midrange drivers, which the X20’s simpler subwoofer-plus-drivers layout doesn’t specify in the same detail.
Buy the W-King X20. It is rated higher for sound quality, and the $1 saving on the Yeahbox Sonic Boom Max 3 is not enough to make up the difference.
Want more options? Browse the full Portable Bluetooth rankings.
A loud stereo party speaker with a large subwoofer, a 24 hour battery with power bank, and water resistance.
A large party speaker with powerful bass, a big fast charging battery and app EQ for outdoor parties.
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Specifications Side By Side
| W-King X20 | Yeahbox Sonic Boom Max 3 | |
|---|---|---|
| Price | $229.99 after coupon | $228.99 |
| Ranked | #43 of 113 in Boombox Size Portable Bluetooth Speakers | #59 of 113 in Boombox Size Portable Bluetooth Speakers |
| App | Yes (W-King app) | Yes |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | ~42Hz | - |
| EQ | Yes (App + button modes) | Yes |
| IP Rating | IPX6 | IPX6 |
| Maximum SPL | 112dB (measured by Alan Ross Reviews) | - |
| MicroSD Playback | Yes | Yes |
| Power Bank | Yes (USB-A) | - |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| USB Playback | Yes | Yes |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC (inferred; additional codecs unverified) |
| Party Mode | No | - |
| Built-in Microphone | No | - |
| Amplifier Power | 330W peak / 200W RMS | 200W RMS / 300W Peak |
| Dimensions | 19.9” x 8.5” x 10.6” (506 x 217 x 270 mm) | 20.7” x 8.3” x 10.6” (525 x 210 x 268 mm) |
| Drivers | 7.5” subwoofer + drivers | 189x114mm woofer, 2x 89mm midrange, 2x 38mm tweeters |
| Weight | 15.9 lbs (7200 g) | 16.8 lbs (7.64 kg) |
| Digital Aux Input | No | No |
| Battery Life | 24 hours (Manufacturer specified) | 111Wh (14.8V/7,500mAh) (Manufacturer specified) |
| Bluetooth Version | 5.4 | 5.3 |
| Lights | - | Yes |
| Strap | - | No |
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