These are not really the same size class, and that is the honest framing here. The Marshall Willen II ranks #11 of 47 small speakers by sound quality at $129.99; the Sony ULT Field 1 ranks #81 of 144 medium speakers by sound quality at $98.
The case for the Marshall Willen II: More balanced than the first Willen, no sharp treble. The catch: Not that deep of bass.
The case for the Sony ULT Field 1: IP67 rated, survives drops and 1m submersion. Watch for: Upper midrange peak, rolled off treble.
Buy the Marshall Willen II ($129.99) for a small speaker; the Sony ULT Field 1 ($98) suits a medium speaker instead.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Marshall Willen II | Sony ULT Field 1 | |
|---|---|---|
| Price | $129.99 | $98.00 |
| Ranked | #11 of 47 in Small Size Portable Bluetooth Speakers | #81 of 144 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Bass Extension (-10dB) | 70Hz | - |
| Battery Life | 17 hours (Manufacturer specified) | 12 hours (Manufacturer specified) |
| Built-in Microphone | Yes | Yes |
| EQ | Yes | Yes |
| IP Rating | IP67 | IP67 |
| Party Mode | No | Yes (Party Connect up to 100 speakers) |
| Power Bank | No | No |
| Power Input | USB-C | USB-C |
| Stereo | No | No |
| Omnidirectional | Pointing up | No |
| TWS | No | Yes |
| Weight | 0.8 lbs (360 g) | 1.4 lbs (650 g) |
| Aux Input | No | No |
| Bluetooth Codecs | SBC | AAC, SBC |
| Bluetooth Version | 5.3 | 5.3 |
| Frequency Response | 75Hz - 20kHz (Manufacturer specified) | - |
| Charging Time | 2.5 hours | - |
| Drivers | 2” (51mm) full-range with dual passive radiators | 83mm x 42mm woofer, 16mm tweeter + passive radiator |
| Dimensions | 3.9” x 1.7” x 3.9” (99 x 43 x 99 mm) | 8.1” x 3” x 3” (206 x 77 x 76 mm) |
| Amplifier Power | 10W | - |
| Digital Aux Input | No | No |
| Strap | Yes (built-in strap) | Yes (detachable strap) |
Related Speaker Comparisons
More worthwhile head-to-heads for Marshall Willen II:
- Tribit Stormbox Micro 2 vs Marshall Willen II
- Soundcore Boom Go 3i vs Marshall Willen II
- Minirig Mini 2 vs Marshall Willen II
- Tribit Stormbox Micro vs Marshall Willen II
- Marshall Willen II vs Tribit Stormbox Micro 3
Prices on this page were last checked September 26, 2026 at 11:14 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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The Two Speakers In Full
Marshall Willen II: $129.99 Amazon eBay
Older model: the Marshall Willen (rated 3.8/5).
Pros: More balanced than the first Willen, no sharp treble. Measured bass extension of 70Hz (-10dB).
Cons: Not that deep of bass. Fairly low max output vs pricier speakers; midrange can sound a bit congested at volume. No aux input.
Full Marshall Willen II review and specifications →
| Amplifier Power | 10W |
|---|---|
| App | Yes |
| Aux Input | No |
| Bass Extension (-10dB) | 70Hz |
| Battery Life | 17 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.3 |
| Built-in Microphone | Yes |
| Charging Time | 2.5 hours |
| Digital Aux Input | No |
| Dimensions | 3.9” x 1.7” x 3.9” (99 x 43 x 99 mm) |
| Drivers | 2” (51mm) full-range with dual passive radiators |
| EQ | Yes |
| Frequency Response | 75Hz - 20kHz (Manufacturer specified) |
| IP Rating | IP67 |
| Omnidirectional | Pointing up |
| Party Mode | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | No |
| Strap | Yes (built-in strap) |
| TWS | No |
| Weight | 0.8 lbs (360 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Marshall Willen II vs Vifa City
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- Marshall Willen II vs Soundcore Mini 3
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- Marshall Willen II vs Soundcore Mini 3 Pro
- Marshall Willen II vs Marshall Willen
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- See all 47 comparisons
Sony ULT Field 1: $98.00 Amazon eBay
Older models: the Sony XB23 (rated 3.3/5) and the Sony SRS-XB20 (rated 2.8/5).
Pros: IP67 rated, survives drops and 1m submersion. Real-world battery around 28+ hours with ULT (bass boost) mode off. Stereo-pairs with a second ULT Field 1.
Cons: Upper midrange peak, rolled off treble
Full Sony ULT Field 1 review and specifications →
| App | Yes |
|---|---|
| Aux Input | No |
| Battery Life | 12 hours (Manufacturer specified) |
| Bluetooth Codecs | AAC, SBC |
| Bluetooth Version | 5.3 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 8.1” x 3” x 3” (206 x 77 x 76 mm) |
| Drivers | 83mm x 42mm woofer, 16mm tweeter + passive radiator |
| EQ | Yes |
| IP Rating | IP67 |
| Omnidirectional | No |
| Party Mode | Yes (Party Connect up to 100 speakers) |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | No |
| Strap | Yes (detachable strap) |
| TWS | Yes |
| Weight | 1.4 lbs (650 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Sony ULT Field 1 vs JBL Grip
- Sony ULT Field 1 vs Treblab HD77
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- See all 113 comparisons