Different classes, so treat this as a step-up-or-not question rather than a head-to-head. The Xiaomi Sound Party ranks #20 of 179 medium speakers by sound quality at $135.84; the Marshall Willen II ranks #11 of 62 small speakers by sound quality at $129.99.
The Xiaomi Sound Party is the deeper-bass, longer-running choice. A versatile outdoor speaker with warm, balanced sound, fully waterproof build, long battery life, a phone charging port and a handy retractable handle. Its bass reaches about 54Hz before falling 10dB, against 70Hz for the Marshall Willen II. It is rated for 26 hours of battery against 17 for the Marshall Willen II. It links with other speakers (Party Connect, up to 100 speakers), which the Marshall Willen II cannot. The tradeoff: The sound evidence is mixed rather than universally glowing.
The Marshall Willen II is the lighter pick. A tiny waterproof strap on speaker with balanced sound, a long battery, and app EQ that clips easily onto a bag. At 0.8 lbs (360 g) it weighs much less than the Xiaomi Sound Party at 2.6 lbs (1.2 kg). The tradeoff: Not that deep of bass.
Buy the Xiaomi Sound Party ($135.84) for a medium speaker; the Marshall Willen II ($129.99) suits a small speaker instead.
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
| Xiaomi Sound Party | Marshall Willen II | |
|---|---|---|
| Price | $135.84 | $129.99 |
| Ranked | #20 of 179 in Medium Size Portable Bluetooth Speakers | #11 of 62 in Small Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Aux Input | No | No |
| Bass Extension (-10dB) | 54Hz | 70Hz |
| Battery Life | 26 hours (Manufacturer specified) | 17 hours (Manufacturer specified) |
| Built-in Microphone | Yes | Yes |
| EQ | Yes | Yes |
| IP Rating | IP67 | IP67 |
| Party Mode | Yes (Party Connect, up to 100 speakers) | No |
| Power Bank | Yes (USB-C, 5V/3A) | No |
| Stereo | No | No |
| Omnidirectional | No | Pointing up |
| TWS | Yes | No |
| Digital Aux Input | No | No |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| Bluetooth Version | 5.4 | 5.3 |
| Dimensions | 10” x 3.6” x 3.6” (255 x 92 x 92 mm) | 3.9” x 1.7” x 3.9” (99 x 43 x 99 mm) |
| Drivers | 2x 40mm woofers (35W total) + 2x 15mm tweeters | 2” (51mm) full-range with dual passive radiators |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) | 75Hz - 20kHz (Manufacturer specified) |
| Maximum SPL | 102dB (measured by Alan Ross Reviews) | - |
| Weight | 2.6 lbs (1200 g) | 0.8 lbs (360 g) |
| Amplifier Power | 50W | 10W |
| Power Input | USB-C (5V/3A, 9V/2A, 12V/2A) | USB-C |
| Lights | Yes | - |
| Strap | Yes (detachable strap) | Yes (built-in strap) |
| Charging Time | - | 2.5 hours |
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