Short answer: the ZZA K8 is the budget pick; the EarFun Uboom X is the tuned one. The K8 is completely insane value at $40, but its very V curve frequency response can be harsh in the treble. The Oluv-tuned Uboom X costs $159.99, a $119.99 gap, and its own catch is the horrible out-of-the-box 0.33 firmware and EQ.
Buy the EarFun Uboom X only if you find one used in good condition; both are discontinued, and it is the better rated of the two.
Want more options? Browse the full Portable Bluetooth rankings.
An extremely neutral Bluetooth speaker, with deep bass and tuning that sounds right at every volume; now discontinued but worth buying used.
Prices on this page were last checked November 7, 2026 at 7:34 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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Specifications Side By Side
| EarFun Uboom X | ZZA K8 | |
|---|---|---|
| Price | $159.99 Discontinued | $40 after clipped coupon, Discontinued |
| Ranked | #1 of 113 in Boombox Size Portable Bluetooth Speakers | #73 of 113 in Boombox Size Portable Bluetooth Speakers |
| App | Yes (Earfun Audio app) | No |
| Aux Input | Yes | Yes |
| Aux Latency | 16ms | - |
| Bass Extension (-10dB) | ~38Hz | - |
| Battery Life | 30 hours (Manufacturer specified) | ~30 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | AAC, SBC | SBC |
| Built-in Microphone | Yes | No |
| EQ | Yes (App EQ) | No |
| IP Rating | IP67 | IPX6 |
| Bluetooth Latency | SBC Video mode 48ms, AAC Video mode 128ms, SBC 112ms, AAC 176ms | - |
| Maximum SPL | 110dB (measured by Alan Ross Reviews) | - |
| Party Mode | Yes (Party Connect mode, up to 50 speakers) | No |
| Power Bank | Yes (USB-C) | Yes (USB-A) |
| Power Input | USB-C | USB-C |
| TWS | Yes | Yes |
| Weight | 9 lbs (4.1 kg) | 6.8 lbs (3.1 kg) |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| USB Playback | No | No |
| FM Tuner | No | No |
| Bluetooth Version | 5.3 | - |
| Amplifier Power | 80W | - |
| Dimensions | 15.7” x 5.9” x 8.5” (400 x 150 x 215 mm) | - |
| Drivers | 2x 102mm (4”) woofers + 2x 20mm tweeters | 8” woofer + tweeters |
| Digital Aux Input | No | No |
| Lights | Yes | - |
| Strap | Yes (detachable shoulder strap) | - |
| Outputs | - | Aux |
| Microphone Input | - | Yes |
| Wireless Microphones | - | Yes 2 Included |
Watch Them Compared
Videos and reviews that test both speakers side by side.
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