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 Essential 2 ranks #71, rated 3.3/5, and costs $85.90, so there is little reason to consider the other one.
Why pick the Earfun Uboom Slim: Excellent pricing, strong waterproof build (IPX7), good battery life (16 hours), smooth sound with volume compensation, speakerphone capability. Watch for: Not as deep bass as others.
Why pick the JBL Flip Essential 2: Essentially a Flip 5 in a new shell: the same single 44 x 80mm racetrack driver and 20W amplifier, rated down to 65Hz. Watch for: There is no tweeter, and side by side comparisons found it does not sound as good as the Flip 6, with less bass; its bass stops growing above about 70% volume, so turning it up mostly adds loudness, not weight.
Buy the Earfun Uboom Slim. It is rated higher for sound quality than the JBL Flip Essential 2 and costs less, so it is the default pick unless a specific strength of the other one matters more to you.
If battery life is a priority, the Earfun Uboom Slim is rated for 16 hours versus 10 hours for the JBL Flip Essential 2.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Earfun Uboom Slim | JBL Flip Essential 2 | |
|---|---|---|
| Price | $79 | $85.90 |
| Ranked | #41 of 150 in Medium Size Portable Bluetooth Speakers | #71 of 150 in Medium Size Portable Bluetooth Speakers |
| Bass Extension (-10dB) | ~63Hz | - |
| Battery Life | 16 hours (Manufacturer specified) | 10 hours (Manufacturer specified) |
| Power Input | USB-C | USB-C |
| Stereo | Yes | No |
| Omnidirectional | No | No |
| Weight | 1.2 lbs (560 g) | 1.1 lbs (520 g) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | SBC | SBC |
| Bluetooth Version | 5.2 | 5.1 |
| Built-in Microphone | Yes | - |
| Drivers | 45mm speaker drivers | 1x 44x80mm racetrack fullrange + 2x passive radiators |
| 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) | 6.9” x 2.7” x 2.8” (175 x 68 x 70 mm) |
| App | No | No |
| Aux Input | Yes | No |
| EQ | No | No |
| TWS | Yes | No |
| Party Mode | - | No |
| Power Bank | - | No |
| Frequency Response | - | 65Hz - 20kHz (Manufacturer specified) |
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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JBL Flip Essential 2: $85.90 Amazon eBay
Older model: the JBL Flip Essential (ranked lower, rated 3.2/5).
Pros: Essentially a Flip 5 in a new shell: the same single 44 x 80mm racetrack driver and 20W amplifier, rated down to 65Hz. In a side by side loudness test it got louder than the JBL Grip, and listeners comparing it with the Marshall Emberton found it more open sounding and clearer. IPX7 waterproof, 520 g, USB-C charging and Bluetooth 5.1 with two phones connected at once.
Cons: There is no tweeter, and side by side comparisons found it does not sound as good as the Flip 6, with less bass; its bass stops growing above about 70% volume, so turning it up mostly adds loudness, not weight. No app, no EQ, no PartyBoost or stereo pairing, a claimed 10 hours of battery, and IPX7 covers water but not dust.
Full JBL Flip Essential 2 review and specifications →
| Amplifier Power | 20W RMS |
|---|---|
| App | No |
| Aux Input | No |
| Battery Life | 10 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.1 |
| Digital Aux Input | No |
| Dimensions | 6.9” x 2.7” x 2.8” (175 x 68 x 70 mm) |
| Drivers | 1x 44x80mm racetrack fullrange + 2x passive radiators |
| EQ | No |
| Frequency Response | 65Hz - 20kHz (Manufacturer specified) |
| IP Rating | IPX7 |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | No |
| TWS | No |
| Weight | 1.1 lbs (520 g) |
- Links
- Reviews, Comparisons and Sound Samples
- AudioTribe: JBL Flip 6 vs JBL Flip Essential 2 FULL TEARDOWN in Just 15 Minutes!
- Speaker Fan: JBL Flip 6 VS JBL Flip Essential 2 VS JBL Grip Loudness Test - Which Is Louder?
- HQ AUDIO Exchange: JBL Flip Essential 2 vs. Flip 6 | Bass Sound Test!
- Cristian Catalin’s Sound&Video: JBL Flip Essential 2 VS Marshall Emberton - sound comparison
- Angelicaaudio: Mini JBL Flip Essential 2 vs. JBL Charge 5 Bluetooth Speaker Review
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