Short answer: the Earfun Uboom Slim. It ranks #41 of 150 medium speakers by sound quality, rated 3.7/5, at $79; the Marshall Emberton II ranks #111, rated 2.7/5, and costs $159.99, so there is not much of a tradeoff to weigh.
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 catch: Not as deep bass as others.
Why pick the Marshall Emberton II: 30 hour battery life: among the best in its class; a 20 min quick-charge gives 4 hours. The catch: Strange unnatural echo-like sound coloration, bass not as deep as competitors.
Buy the Earfun Uboom Slim. It is rated higher for sound quality than the Marshall Emberton II and costs less, so only choose the other one for a particular feature it does better.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| Earfun Uboom Slim | Marshall Emberton II | |
|---|---|---|
| Price | $79 | $159.99 |
| Ranked | #41 of 150 in Medium Size Portable Bluetooth Speakers | #111 of 150 in Medium Size Portable Bluetooth Speakers |
| Bass Extension (-10dB) | ~63Hz | 62Hz |
| Battery Life | 16 hours (Manufacturer specified) | 30 hours (Manufacturer specified) |
| Power Input | USB-C | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | Yes |
| Weight | 1.2 lbs (560 g) | 1.5 lbs (700 g) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| Bluetooth Version | 5.2 | 5.1 |
| Built-in Microphone | Yes | No |
| Drivers | 45mm speaker drivers | 2x 2” full-range drivers + 2x passive radiators |
| Amplifier Power | 20W | 20W |
| IP Rating | IPX7 | IP67 |
| Digital Aux Input | No | No |
| Dimensions | 2.6”H x 7.1”W x 2.6”D (65 x 180 x 65 mm) | 6.3” x 2.7” x 3” (160 x 68 x 76 mm) |
| App | No | Yes |
| Aux Input | Yes | No |
| EQ | No | Yes (3 presets via app) |
| TWS | Yes | No |
| Bluetooth Latency | - | 80ms |
| Maximum SPL | - | 88dB (measured by Alan Ross Reviews) |
| Party Mode | - | Yes (Marshall Stack) |
| Power Bank | - | No |
| 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 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
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 | Yes |
| 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) |
- Reviews, Comparisons and Sound Samples
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Marshall Emberton II: $159.99 Amazon eBay
Newer model: the Marshall Emberton III, ranked higher, rated 2.7/5.
Pros: 30 hour battery life: among the best in its class; a 20 min quick-charge gives 4 hours. IP67 rated, durable rubbery build using 50% recycled plastic. Measured bass extension of 62Hz (-10dB).
Cons: Strange unnatural echo-like sound coloration, bass not as deep as competitors. Not technically a 360 speaker, only front and rear. Not very loud.
Full Marshall Emberton II review and specifications →
| Amplifier Power | 20W |
|---|---|
| App | Yes |
| Aux Input | No |
| Bass Extension (-10dB) | 62Hz |
| Battery Life | 30 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Latency | 80ms |
| Bluetooth Version | 5.1 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 6.3” x 2.7” x 3” (160 x 68 x 76 mm) |
| Drivers | 2x 2” full-range drivers + 2x passive radiators |
| EQ | Yes (3 presets via app) |
| IP Rating | IP67 |
| Maximum SPL | 88dB (measured by Alan Ross Reviews) |
| Omnidirectional | Yes |
| Party Mode | Yes (Marshall Stack) |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | Yes |
| Strap | No |
| TWS | No |
| Weight | 1.5 lbs (700 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: Marshall Emberton vs Marshall Stockwell 2 - little guy goes louder?? 🤓 More from alanrossreviews →
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- Alan Ross Reviews: Marshall Emberton vs JBL Flip 5 & Soundcore Boost - true stereophonic 🤓
- Passione Speaker: Bass Test Marshall Emberton 2 vs Emberton 3
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