Short answer: the Bose Soundlink Flex 2nd gen for better sound quality, the Tronsmart Mirtune C3 Plus for the lower price. The Bose Soundlink Flex 2nd gen ranks #35 of 150 medium speakers, rated 3.8/5, at $159. The Tronsmart Mirtune C3 Plus ranks #75, rated 3.3/5, at $49.99, $109.01 cheaper.
The case for the Bose Soundlink Flex 2nd gen: A very portable 586g, IP67-rated speaker with a clear, well-balanced midrange that keeps voices and instruments intelligible. 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.
Why pick the Tronsmart Mirtune C3 Plus: A racetrack woofer and a tweeter rated for 50W, with IPX7 waterproofing, Bluetooth 6.0, Auracast multi-speaker sync, stereo pairing, USB-C audio input, app EQ and a detachable lanyard, at 0.81 kg. The tradeoff: In side by side tests by Clinch Audio Bass and Mateusz Cholewa, the Xiaomi Sound Party and Soundcore Boom 3i sounded more refined and fuller, and listeners described the C3 Plus’s treble as dull.
Buy the Bose Soundlink Flex 2nd gen if sound quality matters more than the price. Buy the Tronsmart Mirtune C3 Plus if the price matters more than sound quality.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Bose Soundlink Flex 2nd gen | Tronsmart Mirtune C3 Plus | |
|---|---|---|
| Price | $159.00 | $49.99 |
| Ranked | #35 of 150 in Medium Size Portable Bluetooth Speakers | #75 of 150 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) | 1.8 lbs (0.81 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.3 | 6.0 |
| Dimensions | 7.9” x 3.5” x 2” (201 x 90 x 52 mm) | 8.3”H x 3.1”W x 3.3”D (210 x 80 x 85 mm) |
| Aux Input | 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 | - | 50W |
| Charging Time | - | 4 hours |
| Frequency Response | - | 50Hz - 20kHz (Manufacturer specified) |
Related Speaker Comparisons
More top alternatives to Bose Soundlink Flex 2nd gen:
- Bose Soundlink Flex 2nd gen vs Earfun Uboom L
- Bose Soundlink Flex 2nd gen vs Soundcore Motion 300
- Bose Soundlink Flex 2nd gen vs Soundcore Motion+
- Bose Soundlink Flex 2nd gen vs Soundcore Boost “upgraded” 2021
- Bose Soundlink Flex 2nd gen vs Minirig 4
Prices on this page were last checked September 30, 2026 at 2:57 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.
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
- Bose Soundlink Flex 2nd gen vs Bose Soundlink Flex
- Bose Soundlink Flex 2nd gen vs Tribit Xsound Plus 2
- Bose Soundlink Flex 2nd gen vs JBL Charge Essential 2
- Bose Soundlink Flex 2nd gen vs Teufel Rockster XS
- Bose Soundlink Flex 2nd gen vs Huawei Sound Joy
- Bose Soundlink Flex 2nd gen vs Cleer Audio Scene
- Bose Soundlink Flex 2nd gen vs JBL Charge Essential 3 SE
- Bose Soundlink Flex 2nd gen vs Soundcore Boom 3i
- See all 141 comparisons
Tronsmart Mirtune C3 Plus: $49.99 Tronsmart Best Buy eBay
Pros: A racetrack woofer and a tweeter rated for 50W, with IPX7 waterproofing, Bluetooth 6.0, Auracast multi-speaker sync, stereo pairing, USB-C audio input, app EQ and a detachable lanyard, at 0.81 kg.
Cons: In side by side tests by Clinch Audio Bass and Mateusz Cholewa, the Xiaomi Sound Party and Soundcore Boom 3i sounded more refined and fuller, and listeners described the C3 Plus’s treble as dull. Tronsmart rates the battery at only 12 hours at half volume. It is a mono unit with no aux input.
Full Tronsmart Mirtune C3 Plus review and specifications →
| Amplifier Power | 50W |
|---|---|
| App | Yes (Tronsmart) |
| Battery Life | 12 hours at 50% volume (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 6.0 |
| Charging Time | 4 hours |
| Digital Aux Input | Yes (USB-C) |
| Dimensions | 8.3”H x 3.1”W x 3.3”D (210 x 80 x 85 mm) |
| Drivers | 1x racetrack woofer + 1x tweeter |
| EQ | Yes (app) |
| Frequency Response | 50Hz - 20kHz (Manufacturer specified) |
| IP Rating | IPX7 |
| Omnidirectional | No |
| Party Mode | Yes (Auracast) |
| Power Input | USB-C |
| Stereo | No |
| Strap | Yes (lanyard) |
| TWS | Yes |
| Weight | 1.8 lbs (0.81 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Clinch Audio Bass: Mirtune C3 Plus 50w VS Xioami Sound Party 50w
- Clinch Audio Bass: Mirtune C3 Plus 50w VS SoundCore Boom 3i 50w
- Techder Audios: Xiaomi Sound Party vs Tronsmart Mirtune C3 Plus - Real Sound & Bass Test! More from techderaudios →
- Mateusz Cholewa: Soundcore Boom 3i vs Tronsmart Mirtune C3 Plus More from Mateusz Cholewa →
- Importados Neto Rocha: Vale a pena pagar o dobro? Tronsmart C3 Plus vs JBL Flip 7
- GiT: Tronsmart Mirtune C3 vs C3+ blind test
- Head-to-Head Comparisons
- Tronsmart Mirtune C3 Plus vs Klipsch Nashville
- Tronsmart Mirtune C3 Plus vs JBL Charge 3
- Tronsmart Mirtune C3 Plus vs JBL Charge Essential
- Tronsmart Mirtune C3 Plus vs JBL Flip Essential 2
- Tronsmart Mirtune C3 Plus vs JBL Flip 5
- Tronsmart Mirtune C3 Plus vs Tronsmart Mirtune S100
- Tronsmart Mirtune C3 Plus vs JBL Grip
- Tronsmart Mirtune C3 Plus vs Sony ULT Field 1
- See all 33 comparisons