Different classes, so treat this as a step-up-or-not question rather than a head-to-head. The Marshall Willen II ranks #11 of 62 small speakers by sound quality at $129.99; the Sony ULT Field 3 ranks #71 of 179 medium speakers by sound quality at $208.
The Marshall Willen II is the lighter option. 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 Sony ULT Field 3 at 2.6 lbs (1.2 kg). The catch: Not that deep of bass.
The Sony ULT Field 3 is the longer-running choice. A rugged waterproof stereo speaker with long battery life, a detailed app EQ, a shoulder strap and a phone charging port. It is rated for 24 hours of battery against 17 for the Marshall Willen II. It supports LDAC Bluetooth, which the Marshall Willen II lacks. It links with other speakers (Party Connect up to 100 speakers), which the Marshall Willen II cannot. Watch for: Sounds a bit hollow, a bit boosted in the treble.
Buy the Marshall Willen II ($129.99) for a small speaker; the Sony ULT Field 3 ($208) suits a medium speaker instead.
Want more options? Browse the full Portable Bluetooth rankings.
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Specifications Side By Side
| Marshall Willen II | Sony ULT Field 3 | |
|---|---|---|
| Price | $129.99 | $208.00 |
| Ranked | #11 of 62 in Small Size Portable Bluetooth Speakers | #71 of 179 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Bass Extension (-10dB) | 70Hz | - |
| Battery Life | 17 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Built-in Microphone | Yes | Yes |
| EQ | Yes | Yes (App + ULT button) |
| IP Rating | IP67 | IP67 |
| Party Mode | No | Yes (Party Connect up to 100 speakers) |
| Power Bank | No | Yes (USB-C, 5V/1.5A) |
| Power Input | USB-C | USB-C |
| Stereo | No | Yes |
| Omnidirectional | Pointing up | No |
| TWS | No | Yes |
| Weight | 0.8 lbs (360 g) | 2.6 lbs (1.2 kg) |
| Aux Input | No | No |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC, AAC, LDAC |
| Bluetooth Version | 5.3 | 5.2 |
| Frequency Response | 75Hz - 20kHz (Manufacturer specified) | - |
| Charging Time | 2.5 hours | - |
| Drivers | 2” (51mm) full-range with dual passive radiators | 1x 20mm tweeter + 1x 86mm x 46mm woofer |
| Dimensions | 3.9” x 1.7” x 3.9” (99 x 43 x 99 mm) | 10.1” x 4.4” x 3.1” (256 x 113 x 79 mm) |
| Amplifier Power | 10W | 27W |
| Digital Aux Input | No | No |
| Strap | Yes (built-in strap) | Yes (detachable shoulder strap) |
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