Short answer: it depends on what you’re optimizing for. The JBL Boombox 4 ranks #20 of 113 boombox speakers at $549.95; the W-King X20 ranks #43 at $229.99, $319.96 less. Neither speaker is a clean win.
The Boombox 4’s own cons are unusually blunt. They call it pretty overpriced for the category and state it sounds worse out of the box than the Boombox 3 it replaced, with the gain coming mainly from having 7 EQ bands instead of 3 so it can be tuned to compensate. Multiple reviewers, including JOY’s 3D Audio-Show and Alan Ross Reviews, published direct Boombox 4 vs Boombox 3 comparisons asking whether it’s actually an improvement. Its pros do note pretty insane output capability for the size, backed by a 41Hz bass extension and 115dB max volume.
The W-King X20 packs a lot of feature for the price. Its pros list 200W RMS output with 330W peak, a 112dB max volume, a 7.5 inch subwoofer, MicroSD and USB playback, an AUX input, and 24-hour battery life with a power bank function. Its one noted flaw is a rising frequency response with the upper treble rolled off and peaks around 700Hz and 1.2kHz.
What the Boombox 4 offers that the X20 does not: a higher IP68 rating against IPX6, Auracast multi-speaker pairing, and a removable battery. The X20 counters with an AUX input, MicroSD and USB playback, and a lower weight relative to its bass output despite being physically heavier overall.
Buy the JBL Boombox 4 if you want the higher-ranked speaker and are willing to spend time in the EQ app to get it sounding its best.
Buy the W-King X20 if you want more raw output, an AUX input, and local file playback for $319.96 less.
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
| JBL Boombox 4 | W-King X20 | |
|---|---|---|
| Price | $549.95 | $229.99 after coupon |
| Ranked | #20 of 113 in Boombox Size Portable Bluetooth Speakers | #43 of 113 in Boombox Size Portable Bluetooth Speakers |
| App | Yes | Yes (W-King app) |
| Aux Input | No | Yes |
| Bass Extension (-10dB) | 41Hz | ~42Hz |
| Battery Life | 28 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| EQ | Yes (7 band) | Yes (App + button modes) |
| IP Rating | IP68 | IPX6 |
| Bluetooth Latency | AAC 144ms, SBC 48ms | - |
| Maximum SPL | 115dB (measured by Alan Ross Reviews) | 112dB (measured by Alan Ross Reviews) |
| Party Mode | Yes (Auracast) | No |
| Power Input | AC Power cord | USB-C |
| Removable Battery | Yes | - |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| Weight | 13.2 lbs (5.98 kg) | 15.9 lbs (7200 g) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC, LC3, AAC | SBC |
| Bluetooth Version | 5.4 | 5.4 |
| Built-in Microphone | No | No |
| Power Bank | Yes (USB-C, up to 30W) | Yes (USB-A) |
| TWS | Yes | Yes |
| Digital Aux Input | Yes (USB-C) | No |
| USB Playback | No | Yes |
| FM Tuner | No | - |
| Microphone Input | No | - |
| MicroSD Playback | No | Yes |
| Amplifier Power | 210W AC / 200W battery | 330W peak / 200W RMS |
| Dimensions | 20.1” x 10.2” x 8.3” (510 x 260 x 210 mm) | 19.9” x 8.5” x 10.6” (506 x 217 x 270 mm) |
| Drivers | 2x 123mm woofers + 2x 20mm tweeters with passive radiators | 7.5” subwoofer + drivers |
| Strap | No | - |
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