These sit in different size classes, so this is not a straight ranking comparison. The Bose Soundlink Flex ranks #38 of 179 medium speakers by sound quality at $79.99; the Bose Soundlink Micro ranks #20 of 62 small speakers by sound quality at $99.99.
The Bose Soundlink Flex is the louder, deeper-bass choice. A small, rugged waterproof speaker that survives drops and floats, with a warm, bass forward sound for casual outdoor use. Its bass reaches about 56Hz before falling 10dB, against 66Hz for the Bose Soundlink Micro. Alan Ross Reviews measured it at 96dB at full volume, against 90dB for the Bose Soundlink Micro. It is rated for 12 hours of battery against 6 for the Bose Soundlink Micro. The catch: Warm sounding with overly boosted bass which drowns out midrange detail.
The Bose Soundlink Micro is the lighter pick. A rugged waterproof pocket speaker with a built in strap, party pairing, and low Bluetooth delay for video. At 0.6 lbs (289 g) it weighs much less than the Bose Soundlink Flex at 1.3 lbs (589 g).
Buy the Bose Soundlink Flex at $79.99 for a medium speaker, or the Bose Soundlink Micro at $99.99 for a small speaker instead.
Want more options? Browse the full Portable Bluetooth rankings.
Prices on this page were last checked November 7, 2026 at 7:34 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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Specifications Side By Side
| Bose Soundlink Flex | Bose Soundlink Micro | |
|---|---|---|
| Price | $79.99 | $99.99 |
| Ranked | #38 of 179 in Medium Size Portable Bluetooth Speakers | #20 of 62 in Small Size Portable Bluetooth Speakers |
| App | Yes | Yes |
| Bass Extension (-10dB) | 56Hz | 66Hz |
| Battery Life | 12 hours (Manufacturer specified) | 6 hours (Manufacturer specified) |
| Built-in Microphone | Yes | Yes |
| EQ | No | No |
| IP Rating | IP67 | IP67 |
| Bluetooth Latency | 33ms | 50ms |
| Maximum SPL | 96dB (measured by Alan Ross Reviews) | 90dB (measured by Alan Ross Reviews) |
| Party Mode | Yes (Bose Party mode) | Yes (Bose Party mode) |
| Power Input | USB-C | Micro USB |
| Stereo | No | No |
| Omnidirectional | No | Pointing up |
| TWS | Yes | Yes |
| Weight | 1.3 lbs (589 g) | 0.6 lbs (289 g) |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 4.2 | 4.2 |
| Dimensions | 7.9” x 3.5” x 2” (201 x 90 x 52 mm) | 3.9” x 3.9” x 1.4” (98 x 98 x 35 mm) |
| Drivers | 1x 60mm full-range driver + 2x passive radiators | 40mm with dual passive radiators |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC | SBC |
| Aux Input | No | No |
| Strap | Yes (built-in loop) | Yes (built-in strap) |
| Power Bank | - | No |
| Charging Time | - | 3 hours |
| Amplifier Power | - | 5W |
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