Short answer: the Harman Kardon Luna if sound quality matters most, the Tronsmart Mirtune C3 if price matters most. The Harman Kardon Luna ranks #24 of 150 medium speakers, rated 4.0/5, at $290.99. The Tronsmart Mirtune C3 ranks #89, rated 3.1/5, at $29.99, $261 cheaper.
What the Harman Kardon Luna does well: Harman Kardon Luna uses 48mm x 90mm woofer, 20mm tweeter. Watch for: Bass is limited by its 57Hz specification.
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.
Buy the Harman Kardon Luna when sound quality outweighs the price for you, and the Tronsmart Mirtune C3 when the price outweighs sound quality instead.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| Harman Kardon Luna | Tronsmart Mirtune C3 | |
|---|---|---|
| Price | $290.99 | $29.99 |
| Ranked | #24 of 150 in Medium Size Portable Bluetooth Speakers | #89 of 150 in Medium Size Portable Bluetooth Speakers |
| App | No | Yes (Tronsmart) |
| Aux Input | No | - |
| Bass Extension (-10dB) | 57Hz | - |
| Battery Life | 12 hours (Manufacturer specified) | 12 hours at 50% volume (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| EQ | No | Yes (app) |
| IP Rating | IP67 | IPX7 |
| MicroSD Playback | No | - |
| Power Input | USB-C | USB-C |
| Stereo | No | No |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| USB Playback | Yes | - |
| Weight | 2.5 lbs (1.13 kg) | 1.2 lbs (0.53 kg) |
| Bluetooth Version | 5.3 | 6.0 |
| Dimensions | 8.3” x 3.1” x 3.1” (210 x 78 x 80 mm) | 7.1”H x 2.8”W x 2.8”D (180 x 70 x 72 mm) |
| Drivers | 48mm x 90mm woofer, 20mm tweeter | 1x racetrack woofer + 1x tweeter |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) | 55Hz - 20kHz (Manufacturer specified) |
| Amplifier Power | 40W | 30W |
| Digital Aux Input | No | Yes (USB-C) |
| Battery Capacity | - | 14.8Wh (7.4V, 2000mAh) |
| Charging Time | - | 2 hours |
| Party Mode | - | Yes (Auracast) |
| Strap | - | Yes (lanyard) |
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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.
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The Two Speakers In Full
Harman Kardon Luna: $290.99 Amazon eBay
Newer model: the Harman Kardon Luna 2, ranked higher, rated 4.1/5.
Pros: Harman Kardon Luna uses 48mm x 90mm woofer, 20mm tweeter. Its 1.13 kg, claimed 12 hours (Manufacturer specified) battery life, IP67 protection and mono playback make it a practical option for its intended room or portable use. The sound is fairly balanced apart from the boosted bass. Measured bass extension of 57Hz (-10dB).
Cons: Bass is limited by its 57Hz specification. There is no companion app. No EQ adjustment. Boosted bass, and less detailed than higher-ranked speakers.
Full Harman Kardon Luna review and specifications →
| Amplifier Power | 40W |
|---|---|
| App | No |
| Aux Input | No |
| Bass Extension (-10dB) | 57Hz |
| Battery Life | 12 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.3 |
| Digital Aux Input | No |
| Dimensions | 8.3” x 3.1” x 3.1” (210 x 78 x 80 mm) |
| Drivers | 48mm x 90mm woofer, 20mm tweeter |
| EQ | No |
| Frequency Response | 60Hz - 20kHz (Manufacturer specified) |
| IP Rating | IP67 |
| MicroSD Playback | No |
| Omnidirectional | No |
| Power Input | USB-C |
| Stereo | No |
| TWS | Yes |
| USB Playback | Yes |
| Weight | 2.5 lbs (1.13 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Harman Kardon Luna vs Harman Kardon Luna 2
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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
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