Short answer: the JBL Charge Essential 2. Both are rated 3.8/5 for sound quality (#37 and #35 of 151 medium speakers), and the JBL Charge Essential 2 costs $130 against $159 for the Bose Soundlink Flex 2nd gen, so with nothing between them on sound quality, price settles it.
Both speakers share the same limitation: neither is stereo. The Flex 2nd gen’s notes describe it as sounding nearly identical to the original Flex, which is a known quantity rather than a step forward. The Charge Essential 2’s notes call it close to Charge 5 performance at a lower price, with slightly less bass than the Charge 5, and its measured bass extension reaches down to around 55Hz with a 60Hz to 20kHz manufacturer-specified frequency response.
What the Charge Essential 2 adds:
- A built-in power bank, letting it charge your phone in a pinch, something the Flex 2nd gen’s notes don’t mention.
- An IP67 rating, called out explicitly in its own notes.
Buy the JBL Charge Essential 2. Both are rated the same for sound quality, and it costs $29 less than the Bose Soundlink Flex 2nd gen.
There is a real battery-life gap here: the JBL Charge Essential 2 is rated for 20 hours, the Bose Soundlink Flex 2nd gen only 12 hours.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Bose Soundlink Flex 2nd gen | JBL Charge Essential 2 | |
|---|---|---|
| Price | $159.00 | $130 |
| Ranked | #35 of 151 in Medium Size Portable Bluetooth Speakers | #37 of 151 in Medium Size Portable Bluetooth Speakers |
| App | Yes | No |
| Battery Life | 12 hours (Manufacturer specified) | 20 hours (Manufacturer specified) |
| Built-in Microphone | Yes | - |
| EQ | Yes (3 band) | No |
| IP Rating | IP67 | IPX7 |
| Party Mode | Yes (Bose Party mode) | No |
| Power Input | USB-C | USB-C |
| Stereo | No | No |
| Omnidirectional | No | No |
| TWS | Yes | No |
| Weight | 1.3 lbs (586 g) | 2.1 lbs (930 g) |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.3 | 5.1 |
| Dimensions | 7.9” x 3.5” x 2” (201 x 90 x 52 mm) | 8.8” x 3.8” x 3.7” (223 x 96.5 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 | SBC (inferred; additional codecs unverified) |
| Digital Aux Input | No | No |
| Strap | Yes (built-in loop) | No |
| Bass Extension (-10dB) | - | ~55Hz |
| Power Bank | - | Yes (USB-A) |
| Frequency Response | - | 60Hz - 20kHz (Manufacturer specified) |
| Amplifier Power | - | 40W |
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Prices on this page were last checked October 2, 2026 at 10:18 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
Older model: the Bose Soundlink Flex (ranked lower, rated 3.8/5).
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 | Yes |
| 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 |
| Strap | Yes (built-in loop) |
| 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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JBL Charge Essential 2: $130 eBay
Newer model: the JBL Charge Essential 3 SE, ranked lower, rated 3.7/5.
Pros: A tough, compact 930g speaker with IPX7 water resistance, USB-C charging, a USB-A power-bank output and a claimed 20-hour battery life. It delivers much of the Charge 5’s familiar punch and volume in a simpler package, with bass that reaches roughly 55Hz for this size. Measured bass extension of ~55Hz (-10dB).
Cons: It is a pared-back Charge: no app EQ, no PartyBoost/party mode and no stereo-pair option. It plays mono, has a little less bass authority than the Charge 5, and its IPX7 rating does not promise dust protection. Choose it for a good sale price, not for extra features.
Full JBL Charge Essential 2 review and specifications →
| Amplifier Power | 40W |
|---|---|
| App | No |
| Aux Input | No |
| Bass Extension (-10dB) | ~55Hz |
| Battery Life | 20 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) |
| Bluetooth Version | 5.1 |
| Digital Aux Input | No |
| Dimensions | 8.8” x 3.8” x 3.7” (223 x 96.5 x 94 mm) |
| Drivers | 53mm x 93mm woofer, 20mm tweeter |
| EQ | No |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) |
| IP Rating | IPX7 |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | Yes (USB-A) |
| Power Input | USB-C |
| Stereo | No |
| Strap | No |
| TWS | No |
| Weight | 2.1 lbs (930 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- JBL Charge Essential 2 vs Bose Soundlink Flex
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- See all 135 comparisons