Short answer: the JBL Xtreme 4, if you are buying new. The Vifa Oslo ranks higher than it (#8 vs #43 of 120 large speakers, 4.5/5 vs 3.8/5) but is discontinued, so only consider it used; the JBL Xtreme 4 is still sold new at $309.95.
The Vifa Oslo is the better-sounding choice. A premium wool covered portable with full, natural, highly accurate sound and rich bass, now discontinued but worth buying used. It supports aptX Bluetooth, which the JBL Xtreme 4 lacks. It keeps a wired aux input, which the JBL Xtreme 4 lacks. The tradeoff: Dip at 270Hz.
The JBL Xtreme 4 is the longer-running, tougher choice. A rugged, waterproof speaker with clear, punchy sound, a swappable battery, a power bank and excellent real world battery life. It is rated for 24 hours of battery against 8 for the Vifa Oslo. It is rated IP67, while the Vifa Oslo has no water resistance. It links with other speakers (Auracast), which the Vifa Oslo cannot. Watch for: It cannot produce the deep rumble of a larger speaker, and bass compression increases near maximum volume.
Buy the JBL Xtreme 4, since the Vifa Oslo is discontinued and only worth hunting down used.
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Specifications Side By Side
| Vifa Oslo | JBL Xtreme 4 | |
|---|---|---|
| Price | $549.00 Discontinued | $309.95 |
| Ranked | #8 of 120 in Large Size Portable Bluetooth Speakers | #43 of 120 in Large Size Portable Bluetooth Speakers |
| App | No (official app is broken, 3rd party android app only) | Yes |
| Aux Input | Yes | No |
| Bass Extension (-10dB) | 50Hz | - |
| Battery Life | 8 hours (Manufacturer specified) | 24 hours (Manufacturer specified) |
| Bluetooth | Yes | Yes |
| Bluetooth Codecs | aptX, SBC | SBC |
| IP Rating | None | IP67 |
| Power Input | AC Power brick | USB-C |
| Stereo | Partially (1 woofer) | Yes |
| Omnidirectional | No | No |
| TWS | No | Yes |
| Weight | 5.3 lbs (2.4 kg) | 4.6 lbs (2.1 kg) |
| Built-in Microphone | Yes | Yes |
| EQ | No | Yes (5 band) |
| Party Mode | No | Yes (Auracast) |
| Power Bank | No | Yes (USB-C) |
| Bluetooth Version | 4.1 | 5.3 |
| Dimensions | 10.6” x 7.1” x 3.5” (268 x 181 x 90 mm) | 11.7” x 5.9” x 5.6” (297 x 149 x 141 mm) |
| Drivers | 2x 50mm fullrange, 2x 80mm woofers + passive radiators | 2x 70mm woofers, 2x 19mm tweeters + 2x passive radiators |
| Frequency Response | 55Hz - 20kHz (Manufacturer specified) | 44Hz - 20kHz (Manufacturer specified) |
| Digital Aux Input | No | No |
| Amplifier Power | 50W | 100W |
| Bluetooth Latency | - | 220ms |
| Maximum SPL | - | 106dB (measured by Alan Ross Reviews) |
| Removable Battery | - | Yes |
| Strap | - | Yes (detachable shoulder strap) |
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