Short answer: the Tronsmart Mirtune C3. It ranks #89 of 150 medium speakers by sound quality, rated 3.1/5, at $29.99; the Ultimate Ears Wonderboom 4 ranks #95, rated 2.9/5, and costs $59.99, so there is not much of a tradeoff to weigh.
What the Tronsmart Mirtune C3 does well: Small and light at 530 g, with a racetrack driver and a tweeter rated for 30W, IPX7 waterproofing, Bluetooth 6.0, Auracast multi-speaker sync, stereo pairing, USB-C audio input, app EQ and a lanyard. The tradeoff: 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.
The case for the Ultimate Ears Wonderboom 4: Small size. Watch for: Bass isn’t as deep as the top-ranked speakers and is a little thuddy.
Buy the Tronsmart Mirtune C3. It is rated higher for sound quality than the Ultimate Ears Wonderboom 4 and costs less, so it is the default pick unless a specific strength of the other one matters more to you.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Tronsmart Mirtune C3 | Ultimate Ears Wonderboom 4 | |
|---|---|---|
| Price | $29.99 | $59.99 |
| Ranked | #89 of 150 in Medium Size Portable Bluetooth Speakers | #95 of 150 in Medium Size Portable Bluetooth Speakers |
| Amplifier Power | 30W | - |
| App | Yes (Tronsmart) | No |
| Battery Capacity | 14.8Wh (7.4V, 2000mAh) | - |
| Battery Life | 12 hours at 50% volume (Manufacturer specified) | 14 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| Bluetooth Version | 6.0 | 5.2 |
| Charging Time | 2 hours | - |
| Digital Aux Input | Yes (USB-C) | No |
| Dimensions | 7.1”H x 2.8”W x 2.8”D (180 x 70 x 72 mm) | 4.1” x 3.8” (104 x 95.3 mm) |
| Drivers | 1x racetrack woofer + 1x tweeter | 2x 40mm active drivers + 2x passive radiators (46.1 x 65.2mm) |
| EQ | Yes (app) | No |
| Frequency Response | 55Hz - 20kHz (Manufacturer specified) | - |
| IP Rating | IPX7 | IP67 |
| Omnidirectional | No | Yes |
| Party Mode | Yes (Auracast) | No |
| Power Input | USB-C | USB-C |
| Stereo | No | No |
| Strap | Yes (lanyard) | Yes (built-in loop) |
| TWS | Yes | Yes |
| Weight | 1.2 lbs (0.53 kg) | 0.9 lbs (420 g) |
| Maximum SPL | - | 87dB (Manufacturer specified) |
| Built-in Microphone | - | No |
| Power Bank | - | No |
| Aux Input | - | No |
Related Speaker Comparisons
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- Tronsmart Mirtune C3 Plus vs Tronsmart Mirtune C3
- JBL Charge Essential vs Tronsmart Mirtune C3
- Tronsmart Mirtune C3 vs Tronsmart Mirtune S100
- Tronsmart Mirtune C3 vs Tribit Xsound Go
- Tronsmart Mirtune C3 vs Tribit Stormbox 2
Prices on this page were last checked September 29, 2026 at 3:43 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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The Two Speakers In Full
Tronsmart Mirtune C3: $29.99 Tronsmart eBay
Pros: Small and light at 530 g, with a racetrack driver and a tweeter rated for 30W, IPX7 waterproofing, Bluetooth 6.0, Auracast multi-speaker sync, stereo pairing, USB-C audio input, app EQ and a lanyard.
Cons: 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. Tronsmart rates the battery at 12 hours at half volume. It is a mono unit with no aux input.
Full Tronsmart Mirtune C3 review and specifications →
| Amplifier Power | 30W |
|---|---|
| App | Yes (Tronsmart) |
| Battery Capacity | 14.8Wh (7.4V, 2000mAh) |
| Battery Life | 12 hours at 50% volume (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 6.0 |
| Charging Time | 2 hours |
| Digital Aux Input | Yes (USB-C) |
| Dimensions | 7.1”H x 2.8”W x 2.8”D (180 x 70 x 72 mm) |
| Drivers | 1x racetrack woofer + 1x tweeter |
| EQ | Yes (app) |
| Frequency Response | 55Hz - 20kHz (Manufacturer specified) |
| IP Rating | IPX7 |
| Omnidirectional | No |
| Party Mode | Yes (Auracast) |
| Power Input | USB-C |
| Stereo | No |
| Strap | Yes (lanyard) |
| TWS | Yes |
| Weight | 1.2 lbs (0.53 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Tronsmart Mirtune C3 vs Tribit Xsound Go
- Tronsmart Mirtune C3 vs Tribit Stormbox 2
- Tronsmart Mirtune C3 vs Soundcore 2
- Tronsmart Mirtune C3 vs Tronsmart Mirtune S100
- Tronsmart Mirtune C3 vs JBL Charge Essential
- Tronsmart Mirtune C3 vs Tronsmart Mirtune C3 Plus
- Tronsmart Mirtune C3 vs Tribit Stormbox Mini+
Ultimate Ears Wonderboom 4: $59.99 Amazon eBay
Older models: the Ultimate Ears Wonderboom 3 (ranked lower, rated 2.9/5), the Ultimate Ears Wonderboom 2 (ranked lower, rated 2.9/5) and the Ultimate Ears Wonderboom (ranked lower, rated 2.9/5).
Pros: Small size.
Cons: Bass isn’t as deep as the top-ranked speakers and is a little thuddy. Not much improvement over the previous Ultimate Ears Wonderboom 3 besides the USB-C charging port.
Full Ultimate Ears Wonderboom 4 review and specifications →
| App | No |
|---|---|
| Aux Input | No |
| Battery Life | 14 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.2 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 4.1” x 3.8” (104 x 95.3 mm) |
| Drivers | 2x 40mm active drivers + 2x passive radiators (46.1 x 65.2mm) |
| EQ | No |
| IP Rating | IP67 |
| Maximum SPL | 87dB (Manufacturer specified) |
| Omnidirectional | Yes |
| Party Mode | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | No |
| Strap | Yes (built-in loop) |
| TWS | Yes |
| Weight | 0.9 lbs (420 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Ultimate Ears Wonderboom 4 vs Ultimate Ears Wonderboom 3
- Ultimate Ears Wonderboom 4 vs Ultimate Ears Megaboom 3
- Ultimate Ears Wonderboom 4 vs Ultimate Ears Wonderboom 2
- Ultimate Ears Wonderboom 4 vs LG Xboom Grab
- Ultimate Ears Wonderboom 4 vs Ultimate Ears Wonderboom
- Ultimate Ears Wonderboom 4 vs Soundcore 2
- Ultimate Ears Wonderboom 4 vs Ultimate Ears Boom 4
- Ultimate Ears Wonderboom 4 vs Tribit Stormbox 2
- See all 113 comparisons