Short answer: the Earfun Uboom Slim. It ranks #41 of 144 medium speakers by sound quality, rated 3.7/5, at $79. The Soundcore 3/Soundcore Select 2 ranks #58, rated 3.4/5, at $49.99, $29.01 cheaper, which does not close the gap in sound quality.
The case for the Earfun Uboom Slim: Excellent pricing, strong waterproof build (IPX7), good battery life (16 hours), smooth sound with volume compensation, speakerphone capability. The tradeoff: Not as deep bass as others.
Why pick the Soundcore 3/Soundcore Select 2: Soundcore 3/Soundcore Select 2 uses 2x 38mm (1.5”) titanium diaphragm full-range drivers + 2x passive radiators. The catch: Bass is limited by its 60Hz specification.
Buy the Earfun Uboom Slim. It is rated higher for sound quality, and saving $29.01 with the Soundcore 3/Soundcore Select 2 does not make up for the sound-quality gap.
If battery life is a priority, the Soundcore 3/Soundcore Select 2 is rated for 24 hours versus 16 hours for the Earfun Uboom Slim.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Earfun Uboom Slim | Soundcore 3/Soundcore Select 2 | |
|---|---|---|
| Price | $79 | $49.99 |
| Ranked | #41 of 144 in Medium Size Portable Bluetooth Speakers | #58 of 144 in Medium Size Portable Bluetooth Speakers |
| Bass Extension (-10dB) | ~63Hz | 60Hz |
| Battery Life | 16 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| Weight | 1.2 lbs (560 g) | 0.8 lbs (372 g) |
| Bluetooth Codecs | SBC | SBC (inferred; additional codecs unverified) |
| Bluetooth Version | 5.2 | 5.0 |
| Built-in Microphone | Yes | - |
| Drivers | 45mm speaker drivers | 2x 38mm (1.5”) titanium diaphragm full-range drivers + 2x passive radiators |
| Amplifier Power | 20W | 16W |
| IP Rating | IPX7 | IPX7 |
| Digital Aux Input | No | No |
| Dimensions | 2.6”H x 7.1”W x 2.6”D (65 x 180 x 65 mm) | 6.9” x 2.2” x 2.3” (174 x 57 x 59 mm) |
| App | No | Yes |
| Aux Input | Yes | No |
| EQ | No | Yes |
| TWS | Yes | Yes |
| Bluetooth Latency | - | 180ms |
| Maximum SPL | - | 99dB (measured by Alan Ross Reviews) |
| Party Mode | - | Yes (PartyCast up to 100 speakers) |
| Strap | - | No |
Related Speaker Comparisons
How Earfun Uboom Slim compares with other leading options:
- Earfun Uboom L vs Earfun Uboom Slim
- Soundcore Motion 300 vs Earfun Uboom Slim
- JBL Charge 6 vs Earfun Uboom Slim
- JBL Flip 6 vs Earfun Uboom Slim
- JBL Flip 7 vs Earfun Uboom Slim
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
Earfun Uboom Slim: $79 eBay
Pros: Excellent pricing, strong waterproof build (IPX7), good battery life (16 hours), smooth sound with volume compensation, speakerphone capability. Measured bass extension of ~63Hz (-10dB).
Cons: Not as deep bass as others. Warm tuned, peaks in the mids and lower treble, rolled off upper treble
Full Earfun Uboom Slim review and specifications →
| Amplifier Power | 20W |
|---|---|
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | ~63Hz |
| Battery Life | 16 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.2 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 2.6”H x 7.1”W x 2.6”D (65 x 180 x 65 mm) |
| Drivers | 45mm speaker drivers |
| EQ | No |
| IP Rating | IPX7 |
| Omnidirectional | No |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| Weight | 1.2 lbs (560 g) |
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Soundcore 3/Soundcore Select 2: $49.99 Amazon eBay
Older model: the Soundcore 2 (rated 3/5).
Pros: Soundcore 3/Soundcore Select 2 uses 2x 38mm (1.5”) titanium diaphragm full-range drivers + 2x passive radiators. Its 372 g, claimed 24 hours (Manufacturer specified) battery life, IPX7 protection, up to 99dB and stereo playback make it a practical option for its intended room or portable use. Measured bass extension of 60Hz (-10dB).
Cons: Bass is limited by its 60Hz specification.
Full Soundcore 3/Soundcore Select 2 review and specifications →
| Amplifier Power | 16W |
|---|---|
| App | Yes |
| Aux Input | No |
| Bass Extension (-10dB) | 60Hz |
| Battery Life | 24 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC (inferred; additional codecs unverified) |
| Bluetooth Latency | 180ms |
| Bluetooth Version | 5.0 |
| Digital Aux Input | No |
| Dimensions | 6.9” x 2.2” x 2.3” (174 x 57 x 59 mm) |
| Drivers | 2x 38mm (1.5”) titanium diaphragm full-range drivers + 2x passive radiators |
| EQ | Yes |
| IP Rating | IPX7 |
| Maximum SPL | 99dB (measured by Alan Ross Reviews) |
| Omnidirectional | No |
| Party Mode | Yes (PartyCast up to 100 speakers) |
| Power Input | USB-C |
| Stereo | Yes |
| Strap | No |
| TWS | Yes |
| Weight | 0.8 lbs (372 g) |
- Links
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