Short answer: the Tronsmart Mirtune S100. It ranks #79 of 144 medium speakers by sound quality, rated 3.1/5, at $79.99. The Ultimate Ears Wonderboom 4 ranks #89, rated 2.9/5, at $59.99, $20 cheaper, a saving that is not big enough to make up the sound-quality gap.
The case for the Tronsmart Mirtune S100: At 1.36 kg, Tronsmart Mirtune S100 combines 20W drivers with Bluetooth. The tradeoff: Bass is limited by its ~64Hz specification.
What the Ultimate Ears Wonderboom 4 does well: Small size. The catch: Bass isn’t as deep as the top-ranked speakers and is a little thuddy.
Buy the Tronsmart Mirtune S100. It is rated higher for sound quality, and the $20 saving on the Ultimate Ears Wonderboom 4 is not enough to make up the difference.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Tronsmart Mirtune S100 | Ultimate Ears Wonderboom 4 | |
|---|---|---|
| Price | $79.99 | $59.99 |
| Ranked | #79 of 144 in Medium Size Portable Bluetooth Speakers | #89 of 144 in Medium Size Portable Bluetooth Speakers |
| Bass Extension (-10dB) | ~64Hz | - |
| Battery Life | 20 hours (Manufacturer specified) | 14 hours (Manufacturer specified) |
| Built-in Microphone | Yes | No |
| IP Rating | IPX7 | IP67 |
| Stereo | Partially | No |
| Omnidirectional | No | Yes |
| Weight | 3 lbs (1.36 kg) | 0.9 lbs (420 g) |
| Wi-Fi | No | - |
| Bluetooth Version | 5.3 | 5.2 |
| Dimensions | 9.1” x 3.5” x 3.9” (231 x 88 x 100 mm) | 4.1” x 3.8” (104 x 95.3 mm) |
| Frequency Response | 50Hz - 20kHz (Manufacturer specified) | - |
| Amplifier Power | 50W | - |
| Drivers | 20W drivers | 2x 40mm active drivers + 2x passive radiators (46.1 x 65.2mm) |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC | SBC |
| App | Yes | No |
| Aux Input | Yes | No |
| EQ | Yes | No |
| TWS | Yes | Yes |
| Power Input | USB-C | USB-C |
| Maximum SPL | - | 87dB (Manufacturer specified) |
| Party Mode | - | No |
| Power Bank | - | No |
| Strap | - | Yes (built-in loop) |
Related Speaker Comparisons
More worthwhile head-to-heads for Tronsmart Mirtune S100:
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- JBL Charge 6 vs Tronsmart Mirtune S100
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Prices on this page were last checked September 26, 2026 at 11:14 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 S100: $79.99 Tronsmart eBay
Pros: At 1.36 kg, Tronsmart Mirtune S100 combines 20W drivers with Bluetooth. Claimed 20 hours (manufacturer specified) battery life, ipx7 protection and limited-stereo playback make its feature set practical for its intended room or portable use. Measured bass extension of ~64Hz (-10dB).
Cons: Bass is limited by its ~64Hz specification. There is no companion app. No EQ adjustment.
Full Tronsmart Mirtune S100 review and specifications →
| Amplifier Power | 50W |
|---|---|
| App | Yes |
| Aux Input | Yes |
| Bass Extension (-10dB) | ~64Hz |
| Battery Life | 20 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.3 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 9.1” x 3.5” x 3.9” (231 x 88 x 100 mm) |
| Drivers | 20W drivers |
| EQ | Yes |
| Frequency Response | 50Hz - 20kHz (Manufacturer specified) |
| IP Rating | IPX7 |
| Omnidirectional | No |
| Power Input | USB-C |
| Stereo | Partially |
| TWS | Yes |
| Weight | 3 lbs (1.36 kg) |
| Wi-Fi | No |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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Ultimate Ears Wonderboom 4: $59.99 Amazon eBay
Older models: the Ultimate Ears Wonderboom 3 (rated 2.9/5), the Ultimate Ears Wonderboom 2 (rated 2.9/5) and the Ultimate Ears Wonderboom (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 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
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- See all 112 comparisons