Short answer: the JBL Flip 6. It ranks #12 of 150 medium speakers by sound quality, rated 4.2/5, at $114.95. The Ultimate Ears Wonderboom 4 ranks #95, rated 2.9/5, at $59.99, $54.96 cheaper, which does not close the gap in sound quality.
The Ultimate Ears Wonderboom 4 is the lighter choice. At 0.9 lbs (420 g) it weighs noticeably less than the JBL Flip 6 at 1.2 lbs (544 g). Watch for: Bass isn’t as deep as the top-ranked speakers and is a little thuddy.
The JBL Flip 6 is the better-sounding option. A very neutral speaker, very small, almost pocket size, a huge sound quality leap over the Flip 5. It supports AAC Bluetooth, which the Ultimate Ears Wonderboom 4 lacks. It links with other speakers (PartyBoost up to 100 speakers), which the Ultimate Ears Wonderboom 4 cannot. It has an adjustable EQ, which the Ultimate Ears Wonderboom 4 lacks. Watch for: Some slight upper mids emphasis.
Buy the JBL Flip 6. It is rated higher for sound quality, and the $54.96 saving on the Ultimate Ears Wonderboom 4 is not enough to make up the difference.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Ultimate Ears Wonderboom 4 | JBL Flip 6 | |
|---|---|---|
| Price | $59.99 | $114.95 |
| Ranked | #95 of 150 in Medium Size Portable Bluetooth Speakers | #12 of 150 in Medium Size Portable Bluetooth Speakers |
| Battery Life | 14 hours (Manufacturer specified) | 12 hours (Manufacturer specified) |
| Maximum SPL | 87dB (Manufacturer specified) | 98dB (measured by Alan Ross Reviews) |
| Power Input | USB-C | USB-C |
| Stereo | No | No |
| Omnidirectional | Yes | No |
| Weight | 0.9 lbs (420 g) | 1.2 lbs (544 g) |
| IP Rating | IP67 | IP67 |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.2 | 5.1 |
| Dimensions | 4.1” x 3.8” (104 x 95.3 mm) | 6.9” x 2.7” x 2.8” (176 x 68 x 72 mm) |
| Drivers | 2x 40mm active drivers + 2x passive radiators (46.1 x 65.2mm) | 44mm x 80mm woofer, 16mm tweeter |
| TWS | Yes | Yes |
| Party Mode | No | Yes (PartyBoost up to 100 speakers) |
| App | No | Yes |
| EQ | No | Yes (3 band) |
| Built-in Microphone | No | No |
| Power Bank | No | No |
| Aux Input | No | No |
| Digital Aux Input | No | No |
| Bluetooth Codecs | SBC | AAC, SBC |
| Strap | Yes (built-in loop) | Yes (built-in loop) |
| Bass Extension (-10dB) | - | 56Hz |
| Bluetooth Latency | - | 116ms |
| Amplifier Power | - | 30W |
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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
Ultimate Ears Wonderboom 4: $59.99 Amazon eBay
Older models: the Ultimate Ears Wonderboom 3 (ranked lower, rated 2.9/5), the Ultimate Ears Wonderboom 2 (ranked lower, rated 2.9/5) and the Ultimate Ears Wonderboom (ranked lower, rated 2.9/5).
Pros: Small size.
Cons: Bass isn’t as deep as the top-ranked speakers and is a little thuddy. Not much improvement over the previous Ultimate Ears Wonderboom 3 besides the USB-C charging port.
Full Ultimate Ears Wonderboom 4 review and specifications →
| App | No |
|---|---|
| Aux Input | No |
| Battery Life | 14 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.2 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 4.1” x 3.8” (104 x 95.3 mm) |
| Drivers | 2x 40mm active drivers + 2x passive radiators (46.1 x 65.2mm) |
| EQ | No |
| IP Rating | IP67 |
| Maximum SPL | 87dB (Manufacturer specified) |
| Omnidirectional | Yes |
| Party Mode | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | No |
| Strap | Yes (built-in loop) |
| TWS | Yes |
| Weight | 0.9 lbs (420 g) |
- Links
- Reviews, Comparisons and Sound Samples
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JBL Flip 6: $114.95 Amazon B&H Photo Video eBay
Newer model: the JBL Flip 7, ranked lower, rated 4.2/5.
Pros: A very neutral speaker, very small, almost pocket size, a huge sound quality leap over the Flip 5. Measured bass extension of 56Hz (-10dB).
Cons: Not stereo. Some slight upper mids emphasis. The TL version (made in Vietnam) tweeter can sound somewhat scratchy and doesn’t sound as good as the GG version (made in China)
Full JBL Flip 6 review and specifications →
| Amplifier Power | 30W |
|---|---|
| App | Yes |
| Aux Input | No |
| Bass Extension (-10dB) | 56Hz |
| Battery Life | 12 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | AAC, SBC |
| Bluetooth Latency | 116ms |
| Bluetooth Version | 5.1 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 6.9” x 2.7” x 2.8” (176 x 68 x 72 mm) |
| Drivers | 44mm x 80mm woofer, 16mm tweeter |
| EQ | Yes (3 band) |
| IP Rating | IP67 |
| Maximum SPL | 98dB (measured by Alan Ross Reviews) |
| Omnidirectional | No |
| Party Mode | Yes (PartyBoost up to 100 speakers) |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | No |
| Strap | Yes (built-in loop) |
| TWS | Yes |
| Weight | 1.2 lbs (544 g) |
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