Short answer: the Boombox 3, for $119.96 more. It ranks #27 of 113 boombox speakers at $349.95; the X20 ranks #43 at $229.99.
The Boombox 3 wins on real features beyond tuning. IP67 water resistance, a genuine power bank function, and PartyBoost pairing with up to 100 compatible JBL speakers. Its measured weakness is dips in the mid bass and a peak at 700Hz.
The X20 competes on raw specs instead: a 7.5-inch subwoofer and 330W peak power, with cons limited to a rising frequency response and peaks at 700Hz and 1.2kHz.
Buy the Boombox 3 for the water resistance, the power bank, and JBL’s pairing ecosystem. Buy the X20 to save $119.96 if those features don’t matter to you.
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
| JBL Boombox 3 | W-King X20 | |
|---|---|---|
| Price | $349.95 | $229.99 after coupon |
| Ranked | #27 of 113 in Boombox Size Portable Bluetooth Speakers | #43 of 113 in Boombox Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Aux Latency | 25ms | - |
| Bass Extension (-10dB) | 43Hz | ~42Hz |
| Battery Life | 24 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| IP Rating | IP67 | IPX6 |
| Bluetooth Latency | 100ms | - |
| Maximum SPL | 110dB (measured by Alan Ross Reviews) | 112dB (measured by Alan Ross Reviews) |
| Party Mode | Yes (PartyBoost up to 100 speakers) | No |
| Power Input | AC Power cable | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 14.8 lbs (6.7 kg) | 15.9 lbs (7200 g) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| App | No | Yes (W-King app) |
| EQ | No | Yes (App + button modes) |
| Power Bank | Yes (USB-A) | Yes (USB-A) |
| USB Playback | No | Yes |
| Built-in Microphone | No | No |
| FM Tuner | No | - |
| Microphone Input | No | - |
| MicroSD Playback | No | Yes |
| Amplifier Power | 180W AC / 136W battery | 330W peak / 200W RMS |
| Dimensions | 19” x 10.1” x 7.9” (482 x 257 x 200 mm) | 19.9” x 8.5” x 10.6” (506 x 217 x 270 mm) |
| Drivers | 1x 189mm subwoofer + 2x 81mm woofers + 2x 20mm tweeters | 7.5” subwoofer + drivers |
| Digital Aux Input | No | No |
| Bluetooth Version | 5.3 | 5.4 |
| Strap | No | - |
Watch Them Compared
Videos and reviews that test both speakers side by side.
- Jay’s Straight Up Reviews & More: New! W-King X20 vs JBL Boombox 3 🛜 Head to Head 🔋Battery Powered 📊Custom EQ - Links In Description
- Alan Ross Reviews: W-King X20 JBL Boombox 3 killer! this should be illegal! - I was shocked!
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