Short answer: the Bose Soundlink Flex. It ranks #38 of 179 medium speakers by sound quality, rated 3.8/5, at $79.99. The Treblab HD77 ranks #100, rated 3.1/5, at $69.97, $10.02 cheaper, not enough of a saving to outweigh the sound-quality gap.
The Bose Soundlink Flex is the better-sounding, 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 Treblab HD77. The catch: Warm sounding with overly boosted bass which drowns out midrange detail.
The Treblab HD77 is the longer-running choice. An affordable speaker with an aux input, long battery life, a speakerphone mic and pairing with a second unit. It is rated for 20 hours of battery against 12 for the Bose Soundlink Flex. It keeps a wired aux input, which the Bose Soundlink Flex lacks. Watch for: Lacking quite a bit of bass compared to higher ranked speakers.
Buy the Bose Soundlink Flex. It is rated higher for sound quality, and the $10.02 saving on the Treblab HD77 is not enough to make up the difference.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
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 | Treblab HD77 | |
|---|---|---|
| Price | $79.99 | $69.97 |
| Ranked | #38 of 179 in Medium Size Portable Bluetooth Speakers | #100 of 179 in Medium Size Portable Bluetooth Speakers |
| App | Yes | No |
| Bass Extension (-10dB) | 56Hz | ~66Hz |
| Battery Life | 12 hours (Manufacturer specified) | 20 hours (Manufacturer specified) |
| Built-in Microphone | Yes | Yes |
| EQ | No | No |
| IP Rating | IP67 | IPX7 |
| Bluetooth Latency | 33ms | - |
| Maximum SPL | 96dB (measured by Alan Ross Reviews) | - |
| Party Mode | Yes (Bose Party mode) | - |
| Power Input | USB-C | USB-C |
| Stereo | No | No (front/rear drivers) |
| Omnidirectional | No | Yes |
| TWS | Yes | Yes |
| Weight | 1.3 lbs (589 g) | 1.4 lbs (637 g) |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 4.2 | 5.0 |
| Dimensions | 7.9” x 3.5” x 2” (201 x 90 x 52 mm) | 7.4” x 3” x 3” (187 x 76 x 76 mm) |
| Drivers | 1x 60mm full-range driver + 2x passive radiators | 2x 48mm fullrange |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC | SBC (additional codecs unverified) |
| Aux Input | No | Yes |
| Strap | Yes (built-in loop) | - |
| Wi-Fi | - | No |
| Frequency Response | - | 50Hz - 20kHz (Manufacturer specified) |
| Amplifier Power | - | 25W RMS |
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