Short answer: the KEF Muo gen2 for better sound quality, the Sony ULT Field 1 for the lower price. The KEF Muo gen2 ranks #73 of 136 medium speakers at $249.99. The Sony ULT Field 1 ranks #76 at $78, $171.99 cheaper.
What the KEF Muo gen2 gets right: KEF seemed to have fixed the rolled off treble and overall balance. The catch: Lacking deeper bass.
What the Sony ULT Field 1 offers: IP67 rated, survives drops and 1m submersion. Watch for: Upper midrange peak, rolled off treble.
Buy the KEF Muo gen2 if sound quality matters more than the price. Buy the Sony ULT Field 1 if the price matters more than sound quality.
If battery life is a priority, the KEF Muo gen2 is rated for 24 hours versus 12 hours for the Sony ULT Field 1.
Specifications Side By Side
| KEF Muo gen2 | Sony ULT Field 1 | |
|---|---|---|
| Price | $249.99 | $78.00 |
| Ranked | #73 of 136 in Medium Size Portable Bluetooth Speakers | #76 of 136 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Battery Life | 24 hours (Manufacturer specified) | 12 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, aptX Adaptive up to 48 KHz 24 bit | AAC, SBC |
| IP Rating | IP67 | IP67 |
| Party Mode | Yes (Auracast) | Yes (Party Connect up to 100 speakers) |
| Stereo | Yes | No |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Digital Aux Input | Yes (USB-C) | No |
| Weight | 1.6 lbs / 740 g | 1.4 lbs / 650 g |
| Bluetooth Version | 5.4 | 5.3 |
| Drivers | 1x 58x117mm racetrack woofer, 1x 20mm tweeter | 83mm x 42mm woofer, 16mm tweeter + passive radiator |
| Dimensions | 8.5" x 3.2" x 2.3" (216 x 82 x 59 mm) | 8.1" x 3" x 3" (206 x 77 x 76 mm) |
| Frequency Response | 43Hz - 20kHz (Manufacturer specified) | - |
| Output Power | 40W | - |
| Max Volume | 90dB | - |
| Aux Input | - | No |
| Built in Microphone | - | Yes |
| EQ | - | Yes |
| Power Bank | - | No |
| Power Input | - | USB-C |
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- JBL Charge 2 vs Sonos Roam
- Sonos Roam vs Sony ULT Field 3
- Sonos Roam 2 vs Sonos Roam
- KEF Muo gen2 vs JBL Grip
- KEF Muo gen2 vs Tribit Stormbox Mini+
The Two Speakers In Full
KEF Muo gen2: $249.99 Amazon
Pros: KEF seemed to have fixed the rolled off treble and overall balance
Cons: Lacking deeper bass. Very thuddy bass. Appears to be the exact same hardware but with updated tuning. Bass distorts as volume increases, and the claimed 43Hz extension is really only audible at low listening volumes, with a few seconds of lag after volume changes. Loses most of its bass off-axis. Customer reviews are mixed, ranging from praise for detail at low volume to complaints of a boxy, hollow sound.
Full KEF Muo gen2 review and specifications →
| App | Yes |
|---|---|
| Battery Life | 24 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, aptX Adaptive up to 48 KHz 24 bit |
| Bluetooth Version | 5.4 |
| Digital Aux Input | Yes (USB-C) |
| Dimensions | 8.5" x 3.2" x 2.3" (216 x 82 x 59 mm) |
| Drivers | 1x 58x117mm racetrack woofer, 1x 20mm tweeter |
| Frequency Response | 43Hz - 20kHz (Manufacturer specified) |
| IP Rating | IP67 |
| Max Volume | 90dB |
| Omnidirectional | No |
| Output Power | 40W |
| Party Mode | Yes (Auracast) |
| Stereo | Yes |
| TWS | Yes |
| Weight | 1.6 lbs / 740 g |
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- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Sony ULT Field 1: $78.00 Amazon
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 |
| TWS | Yes |
| Weight | 1.4 lbs / 650 g |
As an eBay Partner, we may be compensated if you make a purchase.
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Sony ULT Field 1 vs JBL Grip
- Sony ULT Field 1 vs Tribit Xsound Go
- Sony ULT Field 1 vs Tribit Xsound Surf
- Sony ULT Field 1 vs Tribit Stormbox 2
- Sony ULT Field 1 vs Sonos Roam
- Sony ULT Field 1 vs Ultimate Ears Wonderboom 4
- Sony ULT Field 1 vs Sony ULT Field 3
- Sony ULT Field 1 vs Bose Soundlink Flex 2nd gen
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