Short answer: the KEF Muo gen2 for balance, the Minirig 4 if you want to add a subwoofer. KEF seemed to have fixed the rolled off treble and overall balance on the Muo gen2, though it still lacks deeper bass. The Minirig 4 is modular and can easily attach a subwoofer, but it only calls itself splash resistant and has no official water rating.
The case for the KEF Muo gen2: KEF seemed to have fixed the rolled off treble and overall balance. The tradeoff: Lacking deeper bass.
What the Minirig 4 gets right: Modular, can easily attach a subwoofer. The catch: Calls itself splash resistant and has no official water rating.
Buy the Minirig 4. It ranks higher for sound quality than the KEF Muo gen2 and costs less, which settles it without a real tradeoff to make.
There is a real gap in water resistance: the KEF Muo gen2 at IP67 (brief submersion) against the Minirig 4, which has Splash resistant (splashing).
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| KEF Muo gen2 | Minirig 4 | |
|---|---|---|
| Price | $249.99 | $229.95 |
| Ranked | #76 of 142 in Medium Size Portable Bluetooth Speakers | #6 of 142 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Battery Life | 24 hours (Manufacturer specified) | 30 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, aptX Adaptive up to 48 kHz 24 bit | AAC, SBC |
| IP Rating | IP67 | Splash resistant |
| Party Mode | Yes (Auracast) | - |
| Stereo | Yes | No |
| Omnidirectional | No | Pointing up |
| TWS | Yes | Yes (Bluetooth or cable) |
| Digital Aux Input | Yes (USB-C) | No |
| Weight | 1.6 lbs (740 g) | 1.2 lbs (550 g) |
| Bluetooth Version | 5.4 | 5.0 |
| Drivers | 1x 58x117mm racetrack woofer, 1x 20mm tweeter | 70mm custom driver |
| Dimensions | 8.5" x 3.2" x 2.3" (216 x 82 x 59 mm) | 4" x 2.9" (101.6 x 73 mm) (diameter x height) |
| Frequency Response | 43Hz - 20kHz (Manufacturer specified) | 60Hz - 18kHz (Manufacturer specified) |
| Amplifier Power | 40W | 50W |
| Maximum SPL | 90dB (Manufacturer specified) | 106dB (measured by Alan Ross Reviews) |
| Aux Input | No | Yes |
| EQ | Yes | Yes |
| Power Input | USB-C | USB-C |
| Aux Latency | - | 0ms |
| Bass Extension (-10dB) | - | 56Hz |
| Bluetooth Latency | - | 60ms |
| Power Bank | - | Yes (USB-C) |
| Built-in Microphone | - | Yes |
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Prices on this page were last checked September 22, 2026 at 5:11 AM 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
KEF Muo gen2: $249.99 Amazon eBay
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 →
| Amplifier Power | 40W |
|---|---|
| App | Yes |
| Aux Input | No |
| 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 |
| EQ | Yes |
| Frequency Response | 43Hz - 20kHz (Manufacturer specified) |
| IP Rating | IP67 |
| Maximum SPL | 90dB (Manufacturer specified) |
| Omnidirectional | No |
| Party Mode | Yes (Auracast) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 1.6 lbs (740 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Minirig 4: $229.95 Amazon eBay
Pros: Modular, can easily attach a subwoofer. Finally USB-C charging. Dynamically changes sound based on forward facing or upward facing orientation. Measured bass extension of 56Hz (-10dB).
Cons: Calls itself splash resistant and has no official water rating. App is buggy. A bit expensive. Has reliability issues more often than any other speaker
Full Minirig 4 review and specifications →
| Amplifier Power | 50W |
|---|---|
| App | Yes |
| Aux Input | Yes |
| Aux Latency | 0ms |
| Bass Extension (-10dB) | 56Hz |
| Battery Life | 30 hours (Manufacturer specified) |
| Bluetooth Codecs | AAC, SBC |
| Bluetooth Latency | 60ms |
| Bluetooth Version | 5.0 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 4" x 2.9" (101.6 x 73 mm) (diameter x height) |
| Drivers | 70mm custom driver |
| EQ | Yes |
| Frequency Response | 60Hz - 18kHz (Manufacturer specified) |
| IP Rating | Splash resistant |
| Maximum SPL | 106dB (measured by Alan Ross Reviews) |
| Omnidirectional | Pointing up |
| Power Bank | Yes (USB-C) |
| Power Input | USB-C |
| Stereo | No |
| TWS | Yes (Bluetooth or cable) |
| Weight | 1.2 lbs (550 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons