Different classes, so treat this as a step-up-or-not question rather than a head-to-head. The Marshall Middleton II ranks #31 of 82 large speakers by sound quality at $330; the Sony ULT Field 3 ranks #61 of 144 medium speakers by sound quality at $138.
Why pick the Marshall Middleton II: Very deep bass for the size/weight. The catch: Bass boosted which drowns out the midrange.
Why pick the Sony ULT Field 3: IP67 rated, dustproof and water resistant. The tradeoff: Sounds a bit hollow, a bit boosted in the treble.
Buy the Marshall Middleton II at $330 if you want a large speaker. Buy the Sony ULT Field 3 at $138 if you want a medium speaker instead.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| Marshall Middleton II | Sony ULT Field 3 | |
|---|---|---|
| Price | $330 | $138.00 |
| Ranked | #31 of 82 in Large Size Portable Bluetooth Speakers | #61 of 144 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Aux Input | Yes | No |
| Bass Extension (-10dB) | 38Hz | - |
| Battery Life | 30 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Built-in Microphone | Yes | Yes |
| EQ | Yes (5 band) | Yes (App + ULT button) |
| IP Rating | IP67 | IP67 |
| Party Mode | Yes (Marshall Stack) | Yes (Party Connect up to 100 speakers) |
| Power Bank | Yes (USB-C) | Yes (USB-C, 5V/1.5A) |
| Power Input | USB-C | USB-C |
| Weight | 4 lbs (1.8 kg) | 2.6 lbs (1.2 kg) |
| Bluetooth Codecs | SBC | SBC, AAC, LDAC |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Bluetooth Version | 5.3 | 5.2 |
| Dimensions | 9.1” x 3.9” x 4.3” (230 x 98 x 110 mm) | 10.1” x 4.4” x 3.1” (256 x 113 x 79 mm) |
| Drivers | 2x 75mm woofers, 2x 0.625” tweeters + 2x passive radiators | 1x 20mm tweeter + 1x 86mm x 46mm woofer |
| Frequency Response | 50Hz - 20kHz (Manufacturer specified) | - |
| Amplifier Power | 80W | 27W |
| Digital Aux Input | No | No |
| Strap | Yes (detachable strap) | Yes (detachable shoulder strap) |
Related Speaker Comparisons
How Marshall Middleton II compares with other leading options:
- Marshall Middleton II vs Vifa Helsinki
- JBL Xtreme 5 vs Marshall Middleton II
- Tribit Stormbox Lava vs Marshall Middleton II
- Marshall Middleton II vs Brane X
- Marshall Middleton II vs Minirig 4 with subwoofer
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 Middleton II: $330 Amazon eBay
Older model: the Marshall Middleton (rated 4/5).
Pros: Very deep bass for the size/weight. Measured bass extension of 38Hz (-10dB).
Cons: Bass boosted which drowns out the midrange. Dip around 200Hz, peak at 1kHz, dipped at 1.6kHz. Strange frequency response through the mids.
Full Marshall Middleton II review and specifications →
| Amplifier Power | 80W |
|---|---|
| App | Yes |
| Aux Input | Yes |
| Bass Extension (-10dB) | 38Hz |
| Battery Life | 30 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.3 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 9.1” x 3.9” x 4.3” (230 x 98 x 110 mm) |
| Drivers | 2x 75mm woofers, 2x 0.625” tweeters + 2x passive radiators |
| EQ | Yes (5 band) |
| Frequency Response | 50Hz - 20kHz (Manufacturer specified) |
| IP Rating | IP67 |
| Omnidirectional | No |
| Party Mode | Yes (Marshall Stack) |
| Power Bank | Yes (USB-C) |
| Power Input | USB-C |
| Stereo | Yes |
| Strap | Yes (detachable strap) |
| TWS | Yes |
| Weight | 4 lbs (1.8 kg) |
- Links
- Reviews, Comparisons and Sound Samples
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Sony ULT Field 3: $138.00 Amazon eBay
Older models: the Sony XB33 (rated 3.4/5), the Sony SRS-XE300 (rated 2.8/5) and the Sony SRS-XB30 (rated 2.6/5).
Pros: IP67 rated, dustproof and water resistant. 24 hour battery life. App with 10-band EQ. Party Connect with up to 100 speakers. USB-C in/out for charging your phone.
Cons: Sounds a bit hollow, a bit boosted in the treble. Custom EQ and the ULT bass-boost button can’t be used together - turning on ULT disables the EQ. Bass is very weak with ULT off. Lost to the JBL Charge 6 in a side-by-side comparison despite being the larger speaker.
Full Sony ULT Field 3 review and specifications →
| Amplifier Power | 27W |
|---|---|
| App | Yes |
| Aux Input | No |
| Battery Life | 24 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, AAC, LDAC |
| Bluetooth Version | 5.2 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 10.1” x 4.4” x 3.1” (256 x 113 x 79 mm) |
| Drivers | 1x 20mm tweeter + 1x 86mm x 46mm woofer |
| EQ | Yes (App + ULT button) |
| IP Rating | IP67 |
| Omnidirectional | No |
| Party Mode | Yes (Party Connect up to 100 speakers) |
| Power Bank | Yes (USB-C, 5V/1.5A) |
| Power Input | USB-C |
| Stereo | Yes |
| Strap | Yes (detachable shoulder strap) |
| TWS | Yes |
| Weight | 2.6 lbs (1.2 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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