Short answer: the W-King X20. It ranks #43 of 113 boombox speakers by sound quality (rated 3.5/5); the Teufel Boomster 4 ranks #50 (rated 3.4/5).
Why pick the W-King X20: A loud stereo party speaker with a large subwoofer, a 24 hour battery with power bank, and water resistance. The tradeoff: Rising frequency response but upper treble rolled off, 700Hz and 1.2kHz peaks.
The Teufel Boomster 4 is the lighter choice. A stereo boombox with DAB+ and FM radio, a long battery, splash resistance and a remote with treble control. At 8.3 lbs (3.75 kg) it weighs much less than the W-King X20 at 15.9 lbs (7.2 kg). It supports aptX HD Bluetooth, which the W-King X20 lacks. The catch: Side by side with the Teufel Boomster 2021 the sound barely changed, and it has a little less deep bass.
Buy the W-King X20. It is rated higher for sound quality than the Teufel Boomster 4.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Prices on this page were last checked November 14, 2026 at 6:17 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
| W-King X20 | Teufel Boomster 4 | |
|---|---|---|
| Price | $229.99 after coupon | €249.99 |
| Ranked | #43 of 113 in Boombox Size Portable Bluetooth Speakers | #50 of 113 in Boombox Size Portable Bluetooth Speakers |
| App | Yes (W-King app) | No |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | ~42Hz | - |
| EQ | Yes (App + button modes) | Yes (treble control) |
| IP Rating | IPX6 | IPX5 |
| Maximum SPL | 112dB (measured by Alan Ross Reviews) | - |
| MicroSD Playback | Yes | - |
| Power Bank | Yes (USB-A) | No |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| USB Playback | Yes | - |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | aptX HD, AAC, SBC |
| Party Mode | No | - |
| Built-in Microphone | No | - |
| Amplifier Power | 330W peak / 200W RMS | 42W RMS |
| Dimensions | 19.9” x 8.5” x 10.6” (506 x 217 x 270 mm) | 7.1”H x 14.6”W x 5.8”D (180 x 370 x 148 mm) |
| Drivers | 7.5” subwoofer + drivers | 2x 20mm tweeters + 2x 65mm midrange drivers + 1x 110mm (4.3”) woofer, passive bass radiators |
| Weight | 15.9 lbs (7200 g) | 8.3 lbs (3.75 kg) |
| Digital Aux Input | No | - |
| Battery Life | 24 hours (Manufacturer specified) | 23 hours (Manufacturer specified) |
| Bluetooth Version | 5.4 | 5.0 |
| FM Tuner | - | Yes (plus DAB+) |
| Strap | - | No |
Where the Ratings Come From
- W-King X20: reviews by Alan Ross, Mateusz Cholewa and Techder Audios.
- Teufel Boomster 4: reviews by Dominik and Mateusz Cholewa.
This comparison is generated from the ratings, specifications and measurements on each product’s own page, and it updates when that data changes. How we rank explains how each rating is decided.
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