Short answer: the Bose Soundlink Flex 2nd gen. It ranks #37 of 179 medium speakers by sound quality, rated 3.8/5, at $159. The Treblab HD77 ranks #100, rated 3.1/5, at $69.97, $89.03 cheaper, a saving that is not big enough to make up the sound-quality gap.
The Bose Soundlink Flex 2nd gen is the better-sounding choice. A small, rugged waterproof speaker with clear, well balanced mids, app EQ, aptX Adaptive and stereo pairing with a second unit. It has an adjustable EQ, which the Treblab HD77 lacks. The catch: 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 Treblab HD77 is the longer-running pick. 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 2nd gen. It keeps a wired aux input, which the Bose Soundlink Flex 2nd gen lacks. The tradeoff: Lacking quite a bit of bass compared to higher ranked speakers.
Buy the Bose Soundlink Flex 2nd gen. It is rated higher for sound quality, and saving $89.03 with the Treblab HD77 does not make up for the sound-quality gap.
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Specifications Side By Side
| Bose Soundlink Flex 2nd gen | Treblab HD77 | |
|---|---|---|
| Price | $159.00 | $69.97 |
| Ranked | #37 of 179 in Medium Size Portable Bluetooth Speakers | #100 of 179 in Medium Size Portable Bluetooth Speakers |
| App | Yes | No |
| Battery Life | 12 hours (Manufacturer specified) | 20 hours (Manufacturer specified) |
| Built-in Microphone | Yes | Yes |
| EQ | Yes (3 band) | No |
| IP Rating | IP67 | IPX7 |
| 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 (586 g) | 1.4 lbs (637 g) |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.3 | 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) |
| Aux Input | No | Yes |
| Drivers | 60mm full-range driver with passive radiators | 2x 48mm fullrange |
| Bluetooth Codecs | SBC, AAC, aptX Adaptive | SBC (additional codecs unverified) |
| Digital Aux Input | No | No |
| Strap | Yes (built-in loop) | - |
| Bass Extension (-10dB) | - | ~66Hz |
| Wi-Fi | - | No |
| Frequency Response | - | 50Hz - 20kHz (Manufacturer specified) |
| Amplifier Power | - | 25W RMS |
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