Short answer: the Soundcore Boom 3i. It ranks #31 of 182 medium speakers by sound quality, rated 4.0/5, at $118.99. The Tronsmart Mirtune C3 Plus ranks #84, rated 3.3/5, at $49.99, $69 cheaper, which does not close the gap in sound quality.
The Soundcore Boom 3i is the better-sounding, longer-running pick. A warm, punchy waterproof speaker that sounds great and is a strong value. It is rated for 16 hours of battery against 12 for the Tronsmart Mirtune C3 Plus. It supports AAC Bluetooth, which the Tronsmart Mirtune C3 Plus lacks. Watch for: Not quite as good as a JBL Charge 5, doesn’t go quite as loud or sound quite as balanced, but very very close.
The case for the Tronsmart Mirtune C3 Plus: An affordable waterproof speaker with a separate tweeter, app EQ, Auracast linking, stereo pairing and USB-C audio input. It links with other speakers (Auracast), which the Soundcore Boom 3i cannot. 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 Soundcore Boom 3i. It is rated higher for sound quality, and saving $69 with the Tronsmart Mirtune C3 Plus does not make up for the sound-quality gap.
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.
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Specifications Side By Side
| Soundcore Boom 3i | Tronsmart Mirtune C3 Plus | |
|---|---|---|
| Price | $118.99 | $49.99 |
| Ranked | #31 of 182 in Medium Size Portable Bluetooth Speakers | #84 of 182 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes (Tronsmart) |
| Aux Input | No | No |
| Bass Extension (-10dB) | 56Hz | - |
| Battery Life | 16 hours (Manufacturer specified) | 12 hours at 50% volume (Manufacturer specified) |
| EQ | Yes | Yes (app) |
| IP Rating | IP68 | IPX7 |
| Party Mode | No | Yes (Auracast) |
| Power Input | USB-C | USB-C |
| Stereo | No | No |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.3 | 6.0 |
| Dimensions | 8.3” x 3.3” x 3.1” (210 x 85 x 78.5 mm) | 8.3”H x 3.1”W x 3.3”D (210 x 80 x 85 mm) |
| Drivers | 94mm woofer + tweeter | 1x racetrack woofer + 1x tweeter |
| Weight | 1.7 lbs (783 g) | 1.8 lbs (0.81 kg) |
| Amplifier Power | 50W | 50W |
| Bluetooth Codecs | SBC, AAC | SBC |
| Built-in Microphone | Yes | - |
| Digital Aux Input | No | Yes (USB-C) |
| Lights | Yes | - |
| Strap | Yes (detachable strap) | Yes (lanyard) |
| Charging Time | - | 4 hours |
| Frequency Response | - | 50Hz - 20kHz (Manufacturer specified) |
Watch Them Compared
Videos and reviews that test both speakers side by side.
- Clinch Audio Bass: Mirtune C3 Plus 50w VS SoundCore Boom 3i 50w
- Mateusz Cholewa: Soundcore Boom 3i vs Tronsmart Mirtune C3 Plus
Where the Ratings Come From
- Soundcore Boom 3i: reviews by Oluv, Mateusz Cholewa and Picky Audio.
- 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.
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