Short answer: the Sony ULT Field 3. It ranks #57 of 134 medium speakers at $148; the KEF Muo gen2 ranks #72 and costs $249.99, so there is not much of a tradeoff to weigh.
What the KEF Muo gen2 gets right: KEF seemed to have fixed the rolled off treble and overall balance. The catch: Lacking deeper bass.
On the Sony ULT Field 3 side: IP67 rated, dustproof and water resistant. The tradeoff: Sounds a bit hollow, a bit boosted in the treble.
Buy the KEF Muo gen2 if the price matters more than the ranking. Buy the Sony ULT Field 3 if the ranking matters more than the price.
Specifications Side By Side
| KEF Muo gen2 | Sony ULT Field 3 | |
|---|---|---|
| Price | $249.99 | $148 |
| Ranked | #72 of 134 in Medium Size Portable Bluetooth Speakers | #57 of 134 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Battery Life | 24 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, aptX Adaptive up to 48 KHz 24 bit | SBC, AAC, LDAC |
| IP Rating | IP67 | IP67 |
| Party Mode | Auracast | Yes (Party Connect up to 100 speakers) |
| Stereo | Yes | Yes |
| TWS | Yes | Yes |
| USB Audio | Yes | - |
| Weight | 1.6 lbs / 740 g | 2.6 lbs / 1.2 kg |
| Bluetooth Version | 5.4 | 5.2 |
| Drivers | 1x 58x117mm racetrack woofer, 1x 20mm tweeter | 1x 20mm tweeter + 1x 86mm x 46mm woofer |
| Dimensions | 8.5" x 3.2" x 2.3" (216 x 82 x 59 mm) | 10.1" x 4.5" x 3.1" (256 x 113 x 79 mm) |
| Frequency Response | 43Hz - 20kHz (Manufacturer specified) | - |
| Output Power | 40W | 27W |
| Max Volume | 90dB | - |
| Aux Input | - | No |
| Built in Microphone | - | Yes |
| EQ | - | Yes (App + ULT button) |
| Power Bank | - | Yes |
| Power Input | - | USB-C |
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
| App | Yes |
|---|---|
| Battery Life | 24 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, aptX Adaptive up to 48 KHz 24 bit |
| Bluetooth Version | 5.4 |
| 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 |
| Output Power | 40W |
| Party Mode | Auracast |
| Stereo | Yes |
| TWS | Yes |
| USB Audio | Yes |
| Weight | 1.6 lbs / 740 g |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- KEF Muo gen2 vs B&O Beosound A1
- KEF Muo gen2 vs B&O Beosound Explore
- KEF Muo gen2 vs Bose Soundlink Revolve+ II
- KEF Muo gen2 vs Denon Envaya DSB-250BT
- KEF Muo gen2 vs JBL Charge 5 Wifi
- KEF Muo gen2 vs Tribit Stormbox Mini+
- KEF Muo gen2 vs Turtlebox Ranger
- KEF Muo gen2 vs B&O Beosound A1 2nd gen
- KEF Muo gen2 vs Huawei Sound Joy
- KEF Muo gen2 vs JBL Pulse 5
- KEF Muo gen2 vs Minirig 4
- KEF Muo gen2 vs Sony SRS-XB30
- KEF Muo gen2 vs Ultimate Ears Megaboom 4
- KEF Muo gen2 vs B&O Beosound A1 3rd gen
- KEF Muo gen2 vs Harman Kardon Luna
- KEF Muo gen2 vs JBL Charge 5
- KEF Muo gen2 vs Marshall Emberton II
- KEF Muo gen2 vs Sonos Roam 2
- KEF Muo gen2 vs Ultimate Ears Megaboom 3
- Links
Sony ULT Field 3: $148 Amazon
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.
| App | Yes |
|---|---|
| Aux Input | No |
| Battery Life | 24 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, AAC, LDAC |
| Bluetooth Version | 5.2 |
| Built in Microphone | Yes |
| Dimensions | 10.1" x 4.5" 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 |
| Output Power | 27W |
| Party Mode | Yes (Party Connect up to 100 speakers) |
| Power Bank | Yes |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 2.6 lbs / 1.2 kg |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Sony ULT Field 3 vs JBL Charge 6
- Sony ULT Field 3 vs Sony ULT Field 1
- Sony ULT Field 3 vs Marshall Emberton II
- Sony ULT Field 3 vs Minirig 2
- Sony ULT Field 3 vs Minirig 3
- Sony ULT Field 3 vs Sony SRS-XE300
- Sony ULT Field 3 vs Tribit Stormbox Mini+
- Sony ULT Field 3 vs Turtlebox Ranger
- Sony ULT Field 3 vs Yamaha True X Speaker 1A
- Sony ULT Field 3 vs JBL Charge Essential 2
- Sony ULT Field 3 vs JBL Flip 7
- Sony ULT Field 3 vs JBL Flip Essential
- Sony ULT Field 3 vs Marshall Emberton III
- Sony ULT Field 3 vs Ultimate Ears Megaboom 3
- Sony ULT Field 3 vs Xiaomi Sound Party
- Sony ULT Field 3 vs Bose Soundlink Flex 2nd gen
- Sony ULT Field 3 vs Harman Kardon Luna
- Sony ULT Field 3 vs Huawei Sound Joy
- Sony ULT Field 3 vs JBL Charge 5
- Sony ULT Field 3 vs JBL Flip 6
- Sony ULT Field 3 vs Sonos Roam
- Sony ULT Field 3 vs Sonos Roam 2
- Sony ULT Field 3 vs Sony SRS-XB20
- Sony ULT Field 3 vs Sony XB33
- Sony ULT Field 3 vs Soundcore Boom 3i
- Sony ULT Field 3 vs Ultimate Ears Boom 3
- Links
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Product prices and availability were last checked August 9, 2026 at 6:57 AM UTC 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.