Short answer: the Teufel Boomster 4, if you are buying new. The EarFun Uboom X ranks higher than it (#1 vs #50 of 113 boombox speakers, 4.7/5 vs 3.4/5) but is discontinued, so only consider it used; the Teufel Boomster 4 is still sold new.
The UBoom X is the stronger boombox. It is extremely neutral, reaches deeper than the Tribit Stormbox Blast and measured about 110dB. In a side by side sound test, listeners split: some heard the Boomster 4 as more detailed and cleaner at full volume, others found it boomier with less balance.
Features: the Boomster 4 has DAB+ and FM radio, a treble control with a remote, aptX HD and a claimed 23 hours. The UBoom X is discontinued.
Buy the Teufel Boomster 4 if you want one new; the EarFun Uboom X is discontinued, so only look for it used.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
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Specifications Side By Side
| EarFun Uboom X | Teufel Boomster 4 | |
|---|---|---|
| Price | $159.99 Discontinued | €249.99 |
| Ranked | #1 of 113 in Boombox Size Portable Bluetooth Speakers | #50 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) | 23 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | AAC, SBC | aptX HD, AAC, SBC |
| Built-in Microphone | Yes | - |
| EQ | Yes (App EQ) | Yes (treble control) |
| IP Rating | IP67 | IPX5 |
| 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) | - |
| Power Bank | Yes (USB-C) | No |
| Power Input | USB-C | USB-C |
| TWS | Yes | Yes |
| Weight | 9 lbs (4.1 kg) | 8.3 lbs (3.75 kg) |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| USB Playback | No | - |
| FM Tuner | No | Yes (plus DAB+) |
| Bluetooth Version | 5.3 | 5.0 |
| Amplifier Power | 80W | 42W RMS |
| Dimensions | 15.7” x 5.9” x 8.5” (400 x 150 x 215 mm) | 7.1”H x 14.6”W x 5.8”D (180 x 370 x 148 mm) |
| Drivers | 2x 102mm (4”) woofers + 2x 20mm tweeters | 2x 20mm tweeters + 2x 65mm midrange drivers + 1x 110mm (4.3”) woofer, passive bass radiators |
| Digital Aux Input | No | - |
| Lights | Yes | - |
| Strap | Yes (detachable shoulder strap) | No |
Watch Them Compared
Videos and reviews that test both speakers side by side.
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