Short answer: the JBL Charge 5 Wifi if you want Wifi, otherwise it is a wash. The Charge 5 Wifi adds Wifi but still sounds warm. The Bose Soundlink Flex 2nd gen sounds pretty much identical to the 1st gen, though its warm sound with overly boosted bass drowns out midrange detail.
On the Bose Soundlink Flex 2nd gen side: Pretty much identical sounding to the 1st gen. Set against that: Warm sounding with overly boosted bass which drowns out midrange detail.
The case for the JBL Charge 5 Wifi: Has Wifi. Set against that: Warm sound.
Buy the JBL Charge 5 Wifi. It is rated higher for sound quality, and saving $91 with the Bose Soundlink Flex 2nd gen does not make up for the sound-quality gap.
There is a real battery-life gap here: the JBL Charge 5 Wifi is rated for 20 hours, the Bose Soundlink Flex 2nd gen only 12 hours.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| Bose Soundlink Flex 2nd gen | JBL Charge 5 Wifi | |
|---|---|---|
| Price | $159.00 | $250 |
| Ranked | #35 of 142 in Medium Size Portable Bluetooth Speakers | #27 of 142 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Battery Life | 12 hours (Manufacturer specified) | 20 hours (Manufacturer specified) |
| Built-in Microphone | Yes | Yes (dual microphones) |
| EQ | Yes (3 band) | Yes (3 band) |
| IP Rating | IP67 | IP67 |
| Party Mode | Yes (Bose Party mode) | No |
| Power Input | USB-C | USB-C |
| Stereo | No | No |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 1.3 lbs (586 g) | 2.2 lbs (1000 g) |
| Bluetooth Version | 5.3 | 5.3 |
| Dimensions | 7.9" x 3.5" x 2" (201 x 90 x 52 mm) | 8.8" x 3.8" x 3.7" (223 x 97 x 94 mm) |
| Aux Input | No | No |
| Drivers | 60mm full-range driver with passive radiators | 53mm x 93mm woofer, 20mm tweeter |
| Bluetooth Codecs | SBC, AAC, aptX Adaptive | AAC, SBC |
| Digital Aux Input | No | No |
| Bass Extension (-10dB) | - | 53Hz |
| Power Bank | - | Yes (USB-A) |
| Wi-Fi | - | Yes |
| Frequency Response | - | 60Hz - 20kHz (Manufacturer specified) |
| Streaming Services | - | AirPlay, Chromecast, Spotify Connect, Alexa Multi-Room Music |
| Amplifier Power | - | 40W |
| Maximum SPL | - | 99dB (Manufacturer specified) |
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Prices on this page were last checked September 23, 2026 at 11:24 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: A very portable 586g, IP67-rated speaker with a clear, well-balanced midrange that keeps voices and instruments intelligible. The second generation adds a Bose app with 3-band EQ, better-placed controls and stereo pairing with another Bose Soundlink Flex 2nd gen. It supports AAC and aptX Adaptive in addition to SBC, making it a stronger wireless option than most small rivals.
Cons: One Flex remains mono and cannot deliver genuine low-bass rumble; RTINGS also found the elevated treble can turn hi-hats and other high-frequency detail piercing. The claimed battery life is only 12 hours, and some owners report accelerated standby drain after firmware updates. It is expensive for its size, so the added app and codec support, not a transformational sound upgrade over the original, are the main reasons to choose it.
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?? More from CEONTHEMAKING →
- Alan Ross - The Anti Shill!: Small speaker, mighty sound, The Flex gen 2 shatters physics!
- Head-to-Head Comparisons
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- Bose Soundlink Flex 2nd gen vs Soundcore Motion 100
- Bose Soundlink Flex 2nd gen vs JBL Charge 5
- See all 94 comparisons
JBL Charge 5 Wifi: $250 Amazon eBay
Pros: Has Wifi. Sounds exactly the same as the non-Wifi version. Measured bass extension of 53Hz (-10dB).
Cons: Not stereo. Warm sound. Shouty upper mids. Boosted bass. Slightly rolled off treble. Overly expensive. No party mode on the wifi version
Full JBL Charge 5 Wifi review and specifications →
| Amplifier Power | 40W |
|---|---|
| App | Yes |
| Aux Input | No |
| Bass Extension (-10dB) | 53Hz |
| Battery Life | 20 hours (Manufacturer specified) |
| Bluetooth Codecs | AAC, SBC |
| Bluetooth Version | 5.3 |
| Built-in Microphone | Yes (dual microphones) |
| Digital Aux Input | No |
| Dimensions | 8.8" x 3.8" x 3.7" (223 x 97 x 94 mm) |
| Drivers | 53mm x 93mm woofer, 20mm tweeter |
| EQ | Yes (3 band) |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) |
| IP Rating | IP67 |
| Maximum SPL | 99dB (Manufacturer specified) |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | Yes (USB-A) |
| Power Input | USB-C |
| Stereo | No |
| Streaming Services | AirPlay, Chromecast, Spotify Connect, Alexa Multi-Room Music |
| TWS | Yes |
| Weight | 2.2 lbs (1000 g) |
| Wi-Fi | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- JBL Charge 5 Wifi vs Bogasing M4
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- See all 95 comparisons