Short answer: the JBL Flip Essential 2. It ranks #71 of 150 medium speakers by sound quality, rated 3.3/5, at $85.90; the Ultimate Ears Boom 4 ranks #99, rated 2.9/5, and costs $109.99, so there is little reason to consider the other one.
The case for 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. The catch: 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.
Why pick the Ultimate Ears Boom 4: IP67 rated, floats, and finally charges via USB-C instead of the older Booms’ Micro-USB. The catch: Not much improvement over the old ones.
Buy the JBL Flip Essential 2. It is rated higher for sound quality than the Ultimate Ears Boom 4 and costs less, which makes it the one to get unless you need something the other one does better.
Looking for alternatives? See the complete Portable Bluetooth rankings.
Specifications Side By Side
| JBL Flip Essential 2 | Ultimate Ears Boom 4 | |
|---|---|---|
| Price | $85.90 | $109.99 |
| Ranked | #71 of 150 in Medium Size Portable Bluetooth Speakers | #99 of 150 in Medium Size Portable Bluetooth Speakers |
| Drivers | 1x 44x80mm racetrack fullrange + 2x passive radiators | 2x 1.57” (40mm) active drivers + 2x 1.81” x 2.57” (46.1 x 65.2mm) passive radiators |
| Amplifier Power | 20W RMS | - |
| Battery Life | 10 hours (Manufacturer specified) | 15 hours (Manufacturer specified) |
| IP Rating | IPX7 | IP67 |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.1 | 5.1 |
| Bluetooth Codecs | SBC | SBC |
| Party Mode | No | - |
| TWS | No | Yes |
| App | No | Yes |
| EQ | No | Yes (via app) |
| Stereo | No | Yes |
| Omnidirectional | No | No |
| Aux Input | No | No |
| Digital Aux Input | No | No |
| Power Bank | No | No |
| Power Input | USB-C | USB-C |
| Weight | 1.1 lbs (520 g) | 1.4 lbs (620 g) |
| Dimensions | 6.9” x 2.7” x 2.8” (175 x 68 x 70 mm) | 7.2” x 2.9” x 2.9” (184 x 73 x 73 mm) |
| Frequency Response | 65Hz - 20kHz (Manufacturer specified) | - |
| Built-in Microphone | - | No |
| Maximum SPL | - | 85dBC (Manufacturer specified) |
| Strap | - | Yes (built-in loop) |
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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
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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Ultimate Ears Boom 4: $109.99 Amazon eBay
Older model: the Ultimate Ears Boom 3 (ranked lower, rated 2.9/5).
Pros: IP67 rated, floats, and finally charges via USB-C instead of the older Booms’ Micro-USB. 15 hour battery. Customizable EQ and speaker-pairing via the UE app.
Cons: Not much improvement over the old ones. Weak bass extension and thuddy bass. Gets distorted above 90%
Full Ultimate Ears Boom 4 review and specifications →
| App | Yes |
|---|---|
| Aux Input | No |
| Battery Life | 15 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.1 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 7.2” x 2.9” x 2.9” (184 x 73 x 73 mm) |
| Drivers | 2x 1.57” (40mm) active drivers + 2x 1.81” x 2.57” (46.1 x 65.2mm) passive radiators |
| EQ | Yes (via app) |
| IP Rating | IP67 |
| Maximum SPL | 85dBC (Manufacturer specified) |
| Omnidirectional | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | Yes |
| Strap | Yes (built-in loop) |
| TWS | Yes |
| Weight | 1.4 lbs (620 g) |
- Links
- Reviews, Comparisons and Sound Samples
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