Short answer: the Earfun Uboom Slim. It ranks #41 of 150 medium speakers by sound quality, rated 3.7/5, at $79. The JBL Flip 5 ranks #70, rated 3.3/5, at $64.97, $14.03 cheaper, which does not close the gap in sound quality.
Why pick 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.
What the JBL Flip 5 does well: Compact and light (1.1 lb) with a carry lanyard. The tradeoff: Not stereo.
One note: the JBL Flip 5 is discontinued, but it still ranks #70 of 150 medium speakers by sound quality, ahead of most of what is still sold new, so it is worth considering used.
Buy the Earfun Uboom Slim. It is rated higher for sound quality, and saving $14.03 with the JBL Flip 5 does not make up for the sound-quality gap.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Earfun Uboom Slim | JBL Flip 5 | |
|---|---|---|
| Price | $79 | $64.97 Discontinued |
| Ranked | #41 of 150 in Medium Size Portable Bluetooth Speakers | #70 of 150 in Medium Size Portable Bluetooth Speakers |
| Bass Extension (-10dB) | ~63Hz | 59Hz |
| Battery Life | 16 hours (Manufacturer specified) | 12 hours (Manufacturer specified) |
| Power Input | USB-C | USB-C |
| Stereo | Yes | No |
| Omnidirectional | No | No |
| Weight | 1.2 lbs (560 g) | 1.2 lbs (540 g) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| Bluetooth Version | 5.2 | 4.2 |
| Built-in Microphone | Yes | No |
| Drivers | 45mm speaker drivers | 1x 44x80mm fullrange |
| Amplifier Power | 20W | 20W RMS |
| 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) | 7.1” x 2.7” x 2.9” (181 x 69 x 74 mm) |
| App | No | Yes |
| Aux Input | Yes | No |
| EQ | No | Yes (via JBL app, sunsetted in 2024) |
| TWS | Yes | Yes |
| Bluetooth Latency | - | 200ms |
| Maximum SPL | - | 92dB (measured by Alan Ross Reviews) |
| Party Mode | - | Yes (PartyBoost up to 100 speakers) |
| Frequency Response | - | 65Hz - 20kHz (Manufacturer specified) |
| Strap | - | Yes (lanyard) |
Related Speaker Comparisons
More top alternatives to 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 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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- Earfun Uboom Slim vs Bose Soundlink Flex 2nd gen
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- See all 33 comparisons
JBL Flip 5: $64.97 Discontinued Amazon eBay
Newer model: the JBL Flip 7, ranked higher, rated 4.2/5.
Pros: Compact and light (1.1 lb) with a carry lanyard. Charges via USB-C, topping off in about 2.5 hours. IP67 rated. Measured bass extension of 59Hz (-10dB).
Cons: Not stereo. Boosted upper bass. Piercing sound when turned up. Peaky lower treble at higher volumes. Discontinued.
Full JBL Flip 5 review and specifications →
| Amplifier Power | 20W RMS |
|---|---|
| App | Yes |
| Aux Input | No |
| Bass Extension (-10dB) | 59Hz |
| Battery Life | 12 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Latency | 200ms |
| Bluetooth Version | 4.2 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 7.1” x 2.7” x 2.9” (181 x 69 x 74 mm) |
| Drivers | 1x 44x80mm fullrange |
| EQ | Yes (via JBL app, sunsetted in 2024) |
| Frequency Response | 65Hz - 20kHz (Manufacturer specified) |
| IP Rating | IPX7 |
| Maximum SPL | 92dB (measured by Alan Ross Reviews) |
| Omnidirectional | No |
| Party Mode | Yes (PartyBoost up to 100 speakers) |
| Power Input | USB-C |
| Stereo | No |
| Strap | Yes (lanyard) |
| TWS | Yes |
| Weight | 1.2 lbs (540 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: Beoplay A1 Denon 250bt JBL Flip 5 Anker Flare 2 More from alanrossreviews →
- DLX Willington: JBL Flip 5 vs Flip 4 :Sound Battle: Almost to the size of the JBL Charge 3? More from DLXWillington →
- Alan Ross Reviews: Sony XB23 vs JBL Flip 5 v Tribit Maxsound Plus
- Techder Audios: #JBL Flip 5 VS #JBL Flip Essential "IMPRESSIVE COMPARISON!?" More from techderaudios →
- Alan Ross Reviews: Marshall Emberton vs JBL Flip 5 & Soundcore Boost - true stereophonic 🤓
- Head-to-Head Comparisons