Short answer: the Vifa Copenhagen 2.0 for better sound quality, the Harman Kardon Onyx Studio 9 for the lower price. The Vifa Copenhagen 2.0 ranks #9 of 70 boombox speakers at $800. The Harman Kardon Onyx Studio 9 ranks #13 at $186.99, $613.01 cheaper.
What the Onyx Studio 9 gets right: Auracast multi-speaker connection, USB-C charging, and an EQ-capable app, at less than a quarter of the price. The catch: slightly recessed mids and rolled-off upper treble.
On the Vifa Copenhagen 2.0 side: An easy-to-clean fabric finish, Wi-Fi/AirPlay support, and real durability (survived a 2m drop with only minor scratches). The tradeoff: peaks at 350Hz and 2-3kHz, and our notes say the cheaper Vifa Helsinki is the more neutral pick if you want a Vifa at all.
Buy the Harman Kardon Onyx Studio 9 if the price matters more than sound quality. Buy the Vifa Copenhagen 2.0 if sound quality matters more than the price.
Specifications Side By Side
| Harman Kardon Onyx Studio 9 | Vifa Copenhagen 2.0 | |
|---|---|---|
| Price | $186.99 | $800 |
| Ranked | #13 of 70 in Boombox Size Portable Bluetooth Speakers | #9 of 70 in Boombox Size Portable Bluetooth Speakers |
| Bass Extension (-10dB) | 41Hz | 46Hz |
| Max Volume | 101dB | - |
| IP Rating | None | None |
| Power Input | USB-C | AC Power brick |
| Stereo | Yes | Yes |
| TWS | Yes | No |
| Weight | 9.3 lbs / 4.2 kg | 10.3 lbs / 4.65 kg |
| App | Yes (Harman Kardon One app) | No |
| Bluetooth Codecs | SBC | aptX HD |
| EQ | Yes (App EQ) | No |
| Party Mode | Yes (Auracast) | No |
| USB Playback | No | Yes |
| Bluetooth Version | 5.3 | 4.1 |
| Battery Life | 8 hours (Manufacturer specified) | 8 hours (Manufacturer specified) |
| Output Power | 50W RMS | 100W |
| Dimensions | 11.4" x 11.3" x 5.1" (289.2 x 287.5 x 130 mm) | 10.6" x 3.5" x 14.3" (268 x 90 x 362 mm) |
| Drivers | 120mm woofer + 3x 20mm tweeters | 2x 94mm woofers + 2x 50mm midrange + 2x 28mm tweeters + 4 passive radiators |
| Aux Input | - | Yes |
| Built in Microphone | - | No |
| Power Bank | - | No |
The Two Speakers In Full
Harman Kardon Onyx Studio 9: $186.99 Amazon
Pros: Auracast multi-speaker connection alongside classic stereo pairing. Harman Kardon One app with EQ. USB-C charging, up from the previous generation’s AC power brick.
Cons: Slight recessed mids, boost in the upper mids, rolled off upper treble. Not as deep bass as previous Onyx Studio speakers.
| App | Yes (Harman Kardon One app) |
|---|---|
| Bass Extension (-10dB) | 41Hz |
| Battery Life | 8 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.3 |
| Dimensions | 11.4" x 11.3" x 5.1" (289.2 x 287.5 x 130 mm) |
| Drivers | 120mm woofer + 3x 20mm tweeters |
| EQ | Yes (App EQ) |
| IP Rating | None |
| Max Volume | 101dB |
| Output Power | 50W RMS |
| Party Mode | Yes (Auracast) |
| Power Input | USB-C |
| Stereo | Yes |
| TWS | Yes |
| USB Playback | No |
| Weight | 9.3 lbs / 4.2 kg |
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- Links
- Reviews, Comparisons and Sound Samples
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Vifa Copenhagen 2.0: $800 Amazon
Pros: Fabric finish is easy to clean and cozy to touch. Durable - dropped from 2m with only minor scratches. Wi-Fi/AirPlay/wired (optical, aux, USB) in addition to Bluetooth. ~5 hour battery at full volume.
Cons: 350hz and 2-3khz peak. The Vifa Helsinki is cheaper and generally has a more neutral frequency response, I’d highly recommend getting one of those instead if you specifically want a Vifa. Not sure I can recommend this one generally these days, the Uboom L has 95% of the sound quality with more features and a way cheaper price. No water rating.
| App | No |
|---|---|
| Aux Input | Yes |
| Bass Extension (-10dB) | 46Hz |
| Battery Life | 8 hours (Manufacturer specified) |
| Bluetooth Codecs | aptX HD |
| Bluetooth Version | 4.1 |
| Built in Microphone | No |
| Dimensions | 10.6" x 3.5" x 14.3" (268 x 90 x 362 mm) |
| Drivers | 2x 94mm woofers + 2x 50mm midrange + 2x 28mm tweeters + 4 passive radiators |
| EQ | No |
| IP Rating | None |
| Output Power | 100W |
| Party Mode | No |
| Power Bank | No |
| Power Input | AC Power brick |
| Stereo | Yes |
| TWS | No |
| USB Playback | Yes |
| Weight | 10.3 lbs / 4.65 kg |
As an eBay Partner, I may be compensated if you make a purchase.
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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Product prices and availability were last checked August 10, 2026 at 7:14 AM UTC 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.