Short answer: the Earfun Uboom Slim. It ranks #41 of 144 medium speakers by sound quality, rated 3.7/5, at $79; the JBL Grip ranks #80, rated 3.1/5, and costs $99.95, so there is not much of a tradeoff to weigh.
What the Earfun Uboom Slim does well: 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 JBL Grip: Ambient light on the back with settable themes. The tradeoff: Lacking deeper bass, definitely the worst of the JBL line until you get to the smaller clip.
Buy the Earfun Uboom Slim. It is rated higher for sound quality than the JBL Grip and costs less, which makes it the one to get unless you need something the other one does better.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Earfun Uboom Slim | JBL Grip | |
|---|---|---|
| Price | $79 | $99.95 |
| Ranked | #41 of 144 in Medium Size Portable Bluetooth Speakers | #80 of 144 in Medium Size Portable Bluetooth Speakers |
| Bass Extension (-10dB) | ~63Hz | ~68Hz |
| Battery Life | 16 hours (Manufacturer specified) | 14 hours (Manufacturer specified) |
| Power Input | USB-C | USB-C |
| Stereo | Yes | No |
| Omnidirectional | No | No |
| Weight | 1.2 lbs (560 g) | 0.8 lbs (385 g) |
| Bluetooth Codecs | SBC | SBC |
| Bluetooth Version | 5.2 | 5.4 |
| Built-in Microphone | Yes | - |
| Drivers | 45mm speaker drivers | 1x 43x80mm fullrange |
| Amplifier Power | 20W | 16W |
| IP Rating | IPX7 | IP68 |
| Digital Aux Input | No | Yes (USB-C) |
| Dimensions | 2.6”H x 7.1”W x 2.6”D (65 x 180 x 65 mm) | 2.5” x 6” x 2.6” (64 x 152 x 65 mm) |
| App | No | Yes |
| Aux Input | Yes | No |
| EQ | No | Yes (7 band) |
| TWS | Yes | Yes |
| Party Mode | - | Yes (Auracast) |
| Frequency Response | - | 70Hz - 20kHz (Manufacturer specified) |
| Lights | - | Yes |
| Strap | - | Yes (strap) |
Related Speaker Comparisons
More worthwhile head-to-heads for Earfun Uboom Slim:
- 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) |
- Reviews, Comparisons and Sound Samples
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JBL Grip: $99.95 Amazon B&H Photo Video eBay
Pros: Ambient light on the back with settable themes. Measured bass extension of ~68Hz (-10dB).
Cons: Lacking deeper bass, definitely the worst of the JBL line until you get to the smaller clip. Not as much clarity as higher ranked speakers, rolled off highs and wavy midrange
Setup: EQ from Oluv in his post can help it a bit but still isn’t very neutral
Full JBL Grip review and specifications →
| Amplifier Power | 16W |
|---|---|
| App | Yes |
| Aux Input | No |
| Bass Extension (-10dB) | ~68Hz |
| Battery Life | 14 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.4 |
| Digital Aux Input | Yes (USB-C) |
| Dimensions | 2.5” x 6” x 2.6” (64 x 152 x 65 mm) |
| Drivers | 1x 43x80mm fullrange |
| EQ | Yes (7 band) |
| Frequency Response | 70Hz - 20kHz (Manufacturer specified) |
| IP Rating | IP68 |
| Lights | Yes |
| Omnidirectional | No |
| Party Mode | Yes (Auracast) |
| Power Input | USB-C |
| Stereo | No |
| Strap | Yes (strap) |
| TWS | Yes |
| Weight | 0.8 lbs (385 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons