Short answer: the Xiaomi Sound Outdoor. It ranks #46 of 182 medium speakers by sound quality, rated 3.7/5, at $49.99; the Tronsmart Mirtune C3 Plus ranks #84, rated 3.3/5, at $49.99. The price gap is small enough that the sound-quality ranking should decide it.
The Xiaomi Sound Outdoor is the better-sounding, lighter choice. An affordable waterproof outdoor speaker with a separate tweeter, decent battery life and linking to many more speakers. At 1.3 lbs (597 g) it weighs noticeably less than the Tronsmart Mirtune C3 Plus at 1.8 lbs (810 g). The catch: Bass reach is limited for the cabinet size, with a rated lower limit of 60Hz, and the boosted bass gets somewhat uncontrolled at high levels.
What the Tronsmart Mirtune C3 Plus does well: An affordable waterproof speaker with a separate tweeter, app EQ, Auracast linking, stereo pairing and USB-C audio input. It has an adjustable EQ, which the Xiaomi Sound Outdoor lacks. The catch: 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 Xiaomi Sound Outdoor. It is rated higher for sound quality than the Tronsmart Mirtune C3 Plus at the same price, so only choose the other one for a particular feature it does better.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
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
| Xiaomi Sound Outdoor | Tronsmart Mirtune C3 Plus | |
|---|---|---|
| Price | $49.99 | $49.99 |
| Ranked | #46 of 182 in Medium Size Portable Bluetooth Speakers | #84 of 182 in Medium Size Portable Bluetooth Speakers |
| App | No | Yes (Tronsmart) |
| Battery Life | 12 hours (Manufacturer specified) | 12 hours at 50% volume (Manufacturer specified) |
| Built-in Microphone | Yes | - |
| EQ | No | Yes (app) |
| IP Rating | IP67 | IPX7 |
| Party Mode | Yes (Speakersync, up to 100 speakers) | Yes (Auracast) |
| Power Input | USB-C | USB-C |
| Stereo | No | No |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Weight | 1.3 lbs (597 g) | 1.8 lbs (0.81 kg) |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.4 | 6.0 |
| Dimensions | 7.7” x 2.7” x 2.6” (196.6 x 68 x 66 mm) | 8.3”H x 3.1”W x 3.3”D (210 x 80 x 85 mm) |
| Drivers | 20W woofer, 10W tweeter + 2x passive radiators | 1x racetrack woofer + 1x tweeter |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) | 50Hz - 20kHz (Manufacturer specified) |
| Amplifier Power | 30W | 50W |
| Digital Aux Input | No | Yes (USB-C) |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) | SBC |
| Aux Input | No | No |
| Charging Time | - | 4 hours |
| Strap | - | Yes (lanyard) |
Where the Ratings Come From
- Xiaomi Sound Outdoor: reviews by Oluv, Mateusz Cholewa and Techder Audios.
- Tronsmart Mirtune C3 Plus: reviews by Oluv, Mateusz Cholewa and Techder Audios.
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 Xiaomi Sound Outdoor: