Short answer: the Marshall Stockwell III if sound quality matters most, the W-King D9 if price matters most. The Marshall Stockwell III ranks #79 of 115 large speakers, rated 3.0/5, at $249.99. The W-King D9 ranks #93, rated 2.5/5, at $89.98, $160.01 cheaper.
The Marshall Stockwell III is the better-sounding, lighter choice. A stylish, rugged speaker with a very long battery you can swap yourself, a detailed app EQ, and power bank charging. At 2.9 lbs (1.3 kg) it weighs noticeably less than the W-King D9 at 4.4 lbs (2 kg). It supports AAC Bluetooth, which the W-King D9 lacks. It has an adjustable EQ, which the W-King D9 lacks. The catch: Highs are recessed by default and need the treble control maxed to compensate, still lacking detail even then.
What the W-King D9 does well: A compact, punchy boombox with a very long rated battery, water resistance, and power bank output for casual outdoor use. Watch for: Treble rolls off early, limiting air and fine detail, while owner reports note Bluetooth interference and some noise at maximum speaker volume.
Buy the Marshall Stockwell III if sound quality is the priority over the price, or the W-King D9 if the price is the priority over sound quality.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
A stylish, rugged speaker with a very long battery you can swap yourself, a detailed app EQ, and power bank charging.
A compact, punchy boombox with a very long rated battery, water resistance, and power bank output for casual outdoor use.
Prices on this page were last checked October 31, 2026 at 7:11 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
| Marshall Stockwell III | W-King D9 | |
|---|---|---|
| Price | $249.99 | $89.98 |
| Ranked | #79 of 115 in Large Size Portable Bluetooth Speakers | #93 of 115 in Large Size Portable Bluetooth Speakers |
| Drivers | 1x 3” woofer, 2x 1.75” wide-band drivers | 2x 40mm drivers + passive radiators |
| Frequency Response | 54Hz - 20kHz (Manufacturer specified) | 80Hz - 16kHz (Manufacturer specified) |
| Amplifier Power | 44W | 60W RMS |
| Battery Life | 40+ hours (Manufacturer specified) | 40 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.3 | 5.3 |
| Bluetooth Codecs | SBC, AAC, LE Audio with LC3 | SBC |
| IP Rating | IP55 | IPX6 |
| Weight | 2.9 lbs (1.3 kg) | 4.4 lbs (2.0 kg) |
| Dimensions | 7.1” x 6.4” x 2.9” (180 x 162 x 74 mm) | 4.7” x 12.4” x 4.7” (120 x 315 x 120 mm) |
| App | Yes | No |
| EQ | Yes (parametric, via app) | No |
| Aux Input | Yes | Yes |
| Digital Aux Input | No | No |
| Power Bank | Yes | Yes (USB-A) |
| Power Input | USB-C | USB-C |
| Stereo | Partially | Yes |
| Omnidirectional | Yes | No |
| TWS | No | No |
| Strap | Yes (detachable strap) | No |
| Bass Extension (-10dB) | - | 47Hz |
| Maximum SPL | - | 106dB (measured by Alan Ross Reviews) |
| MicroSD Playback | - | Yes |
| Built-in Microphone | - | Yes |
| Party Mode | - | No |
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