Short answer: the Bose Soundlink Flex 2nd gen on measured sound quality, the Tronsmart Mirtune C3 on price. The Bose Soundlink Flex 2nd gen ranks #37 of 182 medium speakers, rated 3.8/5, at $159. The Tronsmart Mirtune C3 ranks #102, rated 3.1/5, at $29.99, $129.01 cheaper.
The Bose Soundlink Flex 2nd gen is the better-sounding option. A small, rugged waterproof speaker with clear, well balanced mids, app EQ, aptX Adaptive and stereo pairing with a second unit. It supports aptX Adaptive Bluetooth, which the Tronsmart Mirtune C3 lacks. The tradeoff: 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.
Why pick the Tronsmart Mirtune C3: A small, light waterproof speaker at a budget price, with Auracast multi speaker sync, stereo pairing, USB-C audio input and app EQ. The catch: In GiT’s three way blind test it came behind the Creative Muvo Go and Xiaomi Sound Outdoor, sounding good only on sparse tracks, and listeners in AudioPro Reviews’ comparison found the JBL Flip 6 fuller with more bass.
Buy the Bose Soundlink Flex 2nd gen if sound quality matters more than the price. Buy the Tronsmart Mirtune C3 if the price matters more than sound quality.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Prices on this page were last checked November 14, 2026 at 6:17 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.
As an eBay Partner, we may be compensated if you make a purchase.
Specifications Side By Side
| Bose Soundlink Flex 2nd gen | Tronsmart Mirtune C3 | |
|---|---|---|
| Price | $159.00 | $29.99 |
| Ranked | #37 of 182 in Medium Size Portable Bluetooth Speakers | #102 of 182 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes (Tronsmart) |
| Battery Life | 12 hours (Manufacturer specified) | 12 hours at 50% volume (Manufacturer specified) |
| Built-in Microphone | Yes | - |
| EQ | Yes (3 band) | Yes (app) |
| IP Rating | IP67 | IPX7 |
| Party Mode | Yes (Bose Party mode) | Yes (Auracast) |
| Power Input | USB-C | USB-C |
| Stereo | No | No |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 1.3 lbs (586 g) | 1.2 lbs (0.53 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.3 | 6.0 |
| Dimensions | 7.9” x 3.5” x 2” (201 x 90 x 52 mm) | 7.1”H x 2.8”W x 2.8”D (180 x 70 x 72 mm) |
| Aux Input | No | No |
| Drivers | 60mm full-range driver with passive radiators | 1x racetrack woofer + 1x tweeter |
| Bluetooth Codecs | SBC, AAC, aptX Adaptive | SBC |
| Digital Aux Input | No | Yes (USB-C) |
| Strap | Yes (built-in loop) | Yes (lanyard) |
| Amplifier Power | - | 30W |
| Battery Capacity | - | 14.8Wh (7.4V, 2000mAh) |
| Charging Time | - | 2 hours |
| Frequency Response | - | 55Hz - 20kHz (Manufacturer specified) |
Where the Ratings Come From
- Bose Soundlink Flex 2nd gen: reviews by Joy & Oluv’Sone, Oluv and Alan Ross.
- Tronsmart Mirtune C3: reviews by THBOX, GiT and AudioPro.
This comparison is generated from the ratings, specifications and measurements on each product’s own page, and it updates when that data changes. How we rank explains how each rating is decided.
Related Speaker Comparisons
More worthwhile head-to-heads for Bose Soundlink Flex 2nd gen: