Short answer: the Bose Soundlink Flex 2nd gen. It ranks #33 of 136 medium speakers by sound quality at $159; the KEF Muo gen2 ranks #73 and costs $249.99, which makes this an easy call rather than a real tradeoff.
What the Bose Soundlink Flex 2nd gen offers: Pretty much identical sounding to the 1st gen Watch for: Not stereo. Warm sounding with overly boosted bass which drowns out midrange detail. Self drains the battery about 10% a week.
What the KEF Muo gen2 offers: KEF seemed to have fixed the rolled off treble and overall balance Watch for: 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.
Buy the Bose Soundlink Flex 2nd gen. It ranks higher for sound quality than the KEF Muo gen2 and costs less, so there is no real case for the other one.
If battery life is a priority, the KEF Muo gen2 is rated for 24 hours versus 12 hours for the Bose Soundlink Flex 2nd gen.
Specifications Side By Side
| Bose Soundlink Flex 2nd gen | KEF Muo gen2 | |
|---|---|---|
| Price | $159.00 | $249.99 |
| Ranked | #33 of 136 in Medium Size Portable Bluetooth Speakers | #73 of 136 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Battery Life | 12 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Built in Microphone | Yes | - |
| EQ | Yes (3 band) | - |
| IP Rating | IP67 | IP67 |
| Party Mode | Yes (Bose Party mode) | Yes (Auracast) |
| Power Input | USB-C | - |
| Stereo | No | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 1.3 lbs / 586 g | 1.6 lbs / 740 g |
| Bluetooth Version | 5.3 | 5.4 |
| Dimensions | 7.9" x 3.5" x 2" (201 x 90 x 52 mm) | 8.5" x 3.2" x 2.3" (216 x 82 x 59 mm) |
| Aux Input | No | - |
| Drivers | 60mm full-range driver with passive radiators | 1x 58x117mm racetrack woofer, 1x 20mm tweeter |
| Bluetooth Codecs | SBC, AAC, aptX Adaptive | SBC, aptX Adaptive up to 48 KHz 24 bit |
| Digital Aux Input | No | Yes (USB-C) |
| Frequency Response | - | 43Hz - 20kHz (Manufacturer specified) |
| Output Power | - | 40W |
| Max Volume | - | 90dB |
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- Harman Kardon Luna vs Bose Soundlink Flex
- B&O Beosound A1 3rd gen vs Tribit Xsound Plus 2
- Bose Soundlink Flex 2nd gen vs JBL Charge 5 Wifi
- Turtlebox Ranger vs Bose Soundlink Flex 2nd gen
Prices on this page were last checked August 27, 2026 at 10:09 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
Bose Soundlink Flex 2nd gen: $159.00 Amazon eBay
Pros: Pretty much identical sounding to the 1st gen
Cons: Not stereo. Warm sounding with overly boosted bass which drowns out midrange detail. Self drains the battery about 10% a week.
Full Bose Soundlink Flex 2nd gen review and specifications →
| App | Yes |
|---|---|
| Aux Input | No |
| Battery Life | 12 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, AAC, aptX Adaptive |
| Bluetooth Version | 5.3 |
| Built in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 7.9" x 3.5" x 2" (201 x 90 x 52 mm) |
| Drivers | 60mm full-range driver with passive radiators |
| EQ | Yes (3 band) |
| IP Rating | IP67 |
| Omnidirectional | No |
| Party Mode | Yes (Bose Party mode) |
| Power Input | USB-C |
| Stereo | No |
| TWS | Yes |
| Weight | 1.3 lbs / 586 g |
- Links
- Reviews, Comparisons and Sound Samples
- Joy & Oluv’Sone: Bose Soundlink Flex 2nd gen vs Flex More from Oluv’Sone →
- Oluv Patreon: Bose Soundlink Flex 2nd gen - sound demo
- Tô Thái Trí Hùng: Unbox & Sound Test - Bose Soundlink Flex 2
- Joy & Oluv’Sone: Bose Soundlink Flex 2nd gen & Soundcore Motion 300 sound test
- Alan Ross: Hall of Fame classic vs latest Bose tech! More from alanrossreviews →
- CEONTHEMAKING: Bose Soundlink Flex 2nd Gen VS Marshall Emberton III - What’s NEW??
- Alan Ross - The Anti Shill!: Small speaker, mighty sound, The Flex gen 2 shatters physics!
- Reddit Search for Bose Soundlink Flex 2nd gen Review
- Head-to-Head Comparisons
- Bose Soundlink Flex 2nd gen vs Bose Soundlink Flex
- Bose Soundlink Flex 2nd gen vs Tribit Xsound Plus 2
- Bose Soundlink Flex 2nd gen vs JBL Charge Essential 2
- Bose Soundlink Flex 2nd gen vs Teufel Rockster XS
- Bose Soundlink Flex 2nd gen vs Soundcore Boom 3i
- Bose Soundlink Flex 2nd gen vs Soundcore Motion 100
- Bose Soundlink Flex 2nd gen vs JBL Charge 5
- Bose Soundlink Flex 2nd gen vs Tribit Stormbox Pro
- See all 82 comparisons
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 →
| 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 |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons