Short answer: the W-King D9, though neither ranks well in its class. It ranks #98 of 120 large speakers by sound quality, rated 2.5/5, at $89.98. The DOSS Extreme Boom ranks #115, rated 2.1/5, at $75.99, $13.99 cheaper, not enough of a saving to outweigh the sound-quality gap. Both are rated below 3.0/5 among the 120 large speakers, and the Soundcore Boom 2, ranked #10 at $99.99, is a better place to start if sound quality matters.
The W-King D9 is the better-sounding, deeper-bass pick. A compact, punchy boombox with a very long rated battery, water resistance, and power bank output for casual outdoor use. Its bass reaches about 47Hz before falling 10dB, against 65Hz for the DOSS Extreme Boom. It is rated for 40 hours of battery against 30 for the DOSS Extreme Boom. At 4.4 lbs (2 kg) it weighs noticeably less than the DOSS Extreme Boom at 5.6 lbs (2.52 kg). The catch: Treble rolls off early, limiting air and fine detail, while owner reports note Bluetooth interference and some noise at maximum speaker volume.
Why pick the DOSS Extreme Boom: An affordable waterproof outdoor speaker with a long rated battery, power bank output, and bass heavy sound for casual parties. The catch: The measured 65Hz -10dB bass point means it lacks true low bass despite its boomy voicing.
Buy the W-King D9. It is rated higher for sound quality, and the $13.99 saving on the DOSS Extreme Boom is not enough to make up the difference.
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
| W-King D9 | DOSS Extreme Boom | |
|---|---|---|
| Price | $89.98 | $75.99 |
| Ranked | #98 of 120 in Large Size Portable Bluetooth Speakers | #115 of 120 in Large Size Portable Bluetooth Speakers |
| Aux Input | Yes | Yes |
| Bass Extension (-10dB) | 47Hz | 65Hz |
| Battery Life | 40 hours (Manufacturer specified) | 30 hours (Manufacturer specified) |
| IP Rating | IPX6 | IPX7 |
| Maximum SPL | 106dB (measured by Alan Ross Reviews) | - |
| MicroSD Playback | Yes | Yes |
| Power Bank | Yes (USB-A) | Yes (USB-A) |
| TWS | No | Yes |
| Weight | 4.4 lbs (2.0 kg) | 5.6 lbs (2.52 kg) |
| App | No | No |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| Built-in Microphone | Yes | Yes |
| EQ | No | No |
| Party Mode | No | No |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| Bluetooth Version | 5.3 | 5.3 |
| Dimensions | 4.7” x 12.4” x 4.7” (120 x 315 x 120 mm) | 12.7” x 4.7” x 7.2” (323 x 120 x 184 mm) |
| Frequency Response | 80Hz - 16kHz (Manufacturer specified) | - |
| Amplifier Power | 60W RMS | 60W |
| Drivers | 2x 40mm drivers + passive radiators | 60W: Dual drivers + passive radiator |
| Digital Aux Input | No | No |
| Strap | No | Yes (detachable shoulder strap) |
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