Short answer: the Vifa Oslo. It ranks #8 of 82 large speakers by sound quality, rated 4.5/5, at $549. The JBL Xtreme 4 ranks #40, rated 3.8/5, at $309.95, $239.05 cheaper, which does not close the gap in sound quality.
Why pick the Vifa Oslo: Extreme treble details with decent bass. The catch: Dip at 270Hz.
Why pick the JBL Xtreme 4: A rugged 2.1kg portable with IP67 protection, a replaceable battery, USB-C power-bank output, Auracast, stereo pairing and a useful 5-band app EQ. Watch for: It cannot produce the deep rumble of a larger speaker, and bass compression increases near maximum volume.
Buy the Vifa Oslo. It is rated higher for sound quality, and the $239.05 you would save on the JBL Xtreme 4 does not close the gap.
If battery life is a priority, the JBL Xtreme 4 is rated for 24 hours versus 8 hours for the Vifa Oslo.
Water resistance is not close: the JBL Xtreme 4 is rated at IP67 (brief submersion), well ahead of the Vifa Oslo at no water resistance.
Want more options? Browse the full Portable Bluetooth rankings.
Specifications Side By Side
| Vifa Oslo | JBL Xtreme 4 | |
|---|---|---|
| Price | $549.00 | $309.95 |
| Ranked | #8 of 82 in Large Size Portable Bluetooth Speakers | #40 of 82 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 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) |
Related Speaker Comparisons
How Vifa Oslo compares with other leading options:
- Vifa Helsinki vs Vifa Oslo
- JBL Xtreme 5 vs Vifa Oslo
- Tribit Stormbox Lava vs Vifa Oslo
- Brane X vs Vifa Oslo
- Minirig 3 with subwoofer vs Vifa Oslo
Prices on this page were last checked September 26, 2026 at 11:14 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
Vifa Oslo: $549.00 Amazon eBay
Pros: Extreme treble details with decent bass. Full, natural, accurate sound at higher volumes. Rich, full bass from opposing 65mm woofers. Premium Kvadrat wool fabric with aluminum handle. 10 hour battery life. Measured bass extension of 50Hz (-10dB).
Cons: Dip at 270Hz. The Vifa Helsinki is cheaper and generally has a more neutral frequency response, so it is the better buy if you specifically want a Vifa. This one is hard to recommend generally these days: the Uboom L has 95% of the sound quality with more features and a much cheaper price.
Full Vifa Oslo review and specifications →
| Amplifier Power | 50W |
|---|---|
| App | No (official app is broken, 3rd party android app only) |
| Aux Input | Yes |
| Bass Extension (-10dB) | 50Hz |
| Battery Life | 8 hours (Manufacturer specified) |
| Bluetooth Codecs | aptX, SBC |
| Bluetooth Version | 4.1 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 10.6” x 7.1” x 3.5” (268 x 181 x 90 mm) |
| Drivers | 2x 50mm fullrange, 2x 80mm woofers + passive radiators |
| EQ | No |
| Frequency Response | 55Hz - 20kHz (Manufacturer specified) |
| IP Rating | None |
| Omnidirectional | No |
| Party Mode | No |
| Power Bank | No |
| Power Input | AC Power brick |
| Stereo | Partially (1 woofer) |
| TWS | No |
| Weight | 5.3 lbs (2.4 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- No independent measurement review is linked for this model; it is ranked from hands-on listening and comparison against similarly priced speakers.
- Head-to-Head Comparisons
JBL Xtreme 4: $309.95 Amazon B&H Photo Video eBay
Newer model: the JBL Xtreme 5, rated 4.6/5.
Pros: A rugged 2.1kg portable with IP67 protection, a replaceable battery, USB-C power-bank output, Auracast, stereo pairing and a useful 5-band app EQ. Independent reviews find the midrange detailed and the sound clear, punchy and refined for outdoor use; it also reaches a strong 106dB maximum level and has excellent real-world battery life.
Cons: It cannot produce the deep rumble of a larger speaker, and bass compression increases near maximum volume. The front-facing layout has only modest off-axis consistency, Bluetooth latency is high for video, and the default balance benefits from EQ adjustment. There is no aux input, so wired sources are not supported. Out of the box it leans bass-boosted, with a dip between the upper bass and midrange that EQ cannot fix, and it pushes the upper mids and treble at high volume. It is also expensive.
Full JBL Xtreme 4 review and specifications →
| Amplifier Power | 100W |
|---|---|
| App | Yes |
| Aux Input | No |
| Battery Life | 24 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Latency | 220ms |
| Bluetooth Version | 5.3 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 11.7” x 5.9” x 5.6” (297 x 149 x 141 mm) |
| Drivers | 2x 70mm woofers, 2x 19mm tweeters + 2x passive radiators |
| EQ | Yes (5 band) |
| Frequency Response | 44Hz - 20kHz (Manufacturer specified) |
| IP Rating | IP67 |
| Maximum SPL | 106dB (measured by Alan Ross Reviews) |
| Omnidirectional | No |
| Party Mode | Yes (Auracast) |
| Power Bank | Yes (USB-C) |
| Power Input | USB-C |
| Removable Battery | Yes |
| Stereo | Yes |
| Strap | Yes (detachable shoulder strap) |
| TWS | Yes |
| Weight | 4.6 lbs (2.1 kg) |
- Links
- Reviews, Comparisons and Sound Samples
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- Alan Ross Reviews: JBL Xtreme 4 vs Flip 7 vs Charge 6 – The ULTIMATE JBL Speaker Showdown! More from alanrossreviews →
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- Head-to-Head Comparisons