Short answer: the Soundcore Boom 3i for better sound quality, the Tronsmart Mirtune C3 for the lower price. The Soundcore Boom 3i ranks #31 of 182 medium speakers, rated 4.0/5, at $118.99. The Tronsmart Mirtune C3 ranks #102, rated 3.1/5, at $29.99, $89 cheaper.
The Soundcore Boom 3i is the better-sounding, longer-running choice. 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. It supports AAC Bluetooth, which the Tronsmart Mirtune C3 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 Tronsmart Mirtune C3 is the lighter pick. A small, light waterproof speaker at a budget price, with Auracast multi speaker sync, stereo pairing, USB-C audio input and app EQ. At 1.2 lbs (530 g) it weighs noticeably less than the Soundcore Boom 3i at 1.7 lbs (783 g). It links with other speakers (Auracast), which the Soundcore Boom 3i cannot. Watch for: 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 Soundcore Boom 3i if sound quality is the priority over the price, or the Tronsmart Mirtune C3 if the price is the priority over sound quality.
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 | |
|---|---|---|
| Price | $118.99 | $29.99 |
| Ranked | #31 of 182 in Medium Size Portable Bluetooth Speakers | #102 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) | 7.1”H x 2.8”W x 2.8”D (180 x 70 x 72 mm) |
| Drivers | 94mm woofer + tweeter | 1x racetrack woofer + 1x tweeter |
| Weight | 1.7 lbs (783 g) | 1.2 lbs (0.53 kg) |
| Amplifier Power | 50W | 30W |
| Bluetooth Codecs | SBC, AAC | SBC |
| Built-in Microphone | Yes | - |
| Digital Aux Input | No | Yes (USB-C) |
| Lights | Yes | - |
| Strap | Yes (detachable strap) | Yes (lanyard) |
| Battery Capacity | - | 14.8Wh (7.4V, 2000mAh) |
| Charging Time | - | 2 hours |
| Frequency Response | - | 55Hz - 20kHz (Manufacturer specified) |
Where the Ratings Come From
- Soundcore Boom 3i: reviews by Oluv, Mateusz Cholewa and Picky Audio.
- 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.
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