Short answer: the EarFun Uboom Slim for value and waterproofing, the Soundcore Motion 300 for bass and stereo modes. The Uboom Slim has excellent pricing, a strong IPX7 build, good 16-hour battery and a speakerphone, but its bass is not as deep and it is warm tuned with peaks in the mids and lower treble. The Motion 300 gives pretty deep bass for its size plus stereo or omnidirectional use, though it needs its EQ for rolled-off treble.
Buy the Soundcore Motion 300. It is rated higher for sound quality and still sold new, while the EarFun Uboom Slim is discontinued.
Want more options? Browse the full Portable Bluetooth rankings.
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Specifications Side By Side
| Soundcore Motion 300 | EarFun Uboom Slim | |
|---|---|---|
| Price | $79.99 | $79 Discontinued |
| Ranked | #3 of 179 in Medium Size Portable Bluetooth Speakers | #43 of 179 in Medium Size Portable Bluetooth Speakers |
| App | Yes | No |
| Aux Input | No | Yes |
| Bass Extension (-10dB) | 50Hz | ~63Hz |
| Battery Life | 13 hours (Manufacturer specified) | 16 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | AAC, LDAC, SBC | SBC |
| Built-in Microphone | Yes | Yes |
| EQ | Yes (9 band with adjustable frequency) | No |
| IP Rating | IPX7 | IPX7 |
| Bluetooth Latency | 216ms ldac, 200ms aac, 116ms sbc | - |
| Maximum SPL | 101dB (measured by Alan Ross Reviews) | - |
| Power Bank | No | - |
| Stereo | Yes | Yes |
| Omnidirectional | Pointing up | No |
| TWS | Yes | Yes |
| Weight | 1.7 lbs (772 g) | 1.2 lbs (560 g) |
| Bluetooth Version | 5.3 | 5.2 |
| Dimensions | 7.9” x 3.6” x 2” (200 x 92 x 50 mm) | 2.6”H x 7.1”W x 2.6”D (65 x 180 x 65 mm) |
| Drivers | 2x 50.8mm (2”) full-range drivers + 2x passive radiators | 45mm speaker drivers |
| Frequency Response | 65Hz - 40kHz (Manufacturer specified) | - |
| Power Input | USB-C | USB-C |
| Amplifier Power | 30W | 20W |
| Party Mode | Yes (PartyCast up to 100 speakers) | - |
| Digital Aux Input | No | No |
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