Short answer: both are discontinued, so this only matters if you are buying used. Used, the Devialet Phantom II 98 dB is the better pick: it ranks #11 of 108 powered bookshelf speakers by sound quality (rated 4.4/5), against #41 (rated 3.9/5) for the Kanto YU6. If you want one new, the Devialet Phantom Ultimate 98dB replaces the Devialet Phantom II 98 dB and is rated 4.4/5 at $3,998.
The Devialet Phantom II 98 dB is the more accurate pick. A compact wireless streaming speaker with startlingly deep bass for its size and an even, well balanced sound. Its measured preference score, a predictor of how neutral it sounds, is 6.87 against 4.28 for the Kanto YU6. The catch: Small-enclosure bass extension at the measurement level does not guarantee the same response at high volume.
The case for the Kanto YU6: A powered bookshelf pair with a phono input, optical, Bluetooth and a remote, a simple multi source system. It supports aptX Bluetooth, which the Devialet Phantom II 98 dB lacks. Watch for: Local response variation remains despite the mild overall tilt: the midrange span is 3.8dB and listening-window narrow-band deviation is 0.419.
Buy the Devialet Phantom II 98 dB only if you find one used in good condition; both are discontinued, and it is the better rated of the two. For a new speaker, buy the Devialet Phantom Ultimate 98dB, which replaces the Devialet Phantom II 98 dB.
Still deciding? The full Powered Home rankings cover every ranked option.
A compact wireless streaming speaker with startlingly deep bass for its size and an even, well balanced sound.
A powered bookshelf pair with a phono input, optical, Bluetooth and a remote, a simple multi source system.
Prices on this page were last checked October 31, 2026 at 7:11 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
| Devialet Phantom II 98 dB | Kanto YU6 | |
|---|---|---|
| Price | $2,998 per pair Discontinued | $380.00 per pair Discontinued |
| Ranked | #11 of 108 in Medium Size Powered Bookshelf Speakers | #41 of 108 in Medium Size Powered Bookshelf Speakers |
| Bass Extension (-3dB) | 30Hz (measured, spinorama.org) | - |
| Bass Extension (-10dB) | approximately 22.6Hz (measured, spinorama.org) | - |
| Drivers | One aluminum full-range driver; two aluminum bass drivers | 1” silk dome tweeter, 5.25” Kevlar woofer |
| Inputs | Wi-Fi, Ethernet, Bluetooth, AirPlay 2, Spotify Connect, UPnP, Roon Ready, analog/optical combo jack | Bluetooth aptX, RCA phono preamp, 2x optical |
| Bluetooth Codecs | SBC, AAC | SBC, aptX |
| Amplifier Power | 400W RMS each | 200W peak Class D (100W RMS total) |
| Dimensions | 6.6 x 6.2 x 8.6 in each | 6.9W x 8.1D x 10.7H in each |
| Weight | 9.5 lbs (4.3 kg) each | 11.5 lbs (5.2 kg) (active), 8.6 lbs (3.9 kg) (passive) |
| Maximum SPL | 98dB at 1m each (manufacturer specified) | - |
| Spinorama Preference Score | 6.87 | 4.28 |
| Spinorama Preference Score with Perfect Sub | 7.95 | 6.89 |
| XLR Input | No | No |
| RCA Input | No | Yes |
| TRS Input | No | No |
| Optical Input | Yes | Yes |
| Coaxial Input | No | No |
| USB Input | No | No |
| HDMI Input | No | No |
| AES Input | No | No |
| Aux Input | No | No |
| Bluetooth | Yes | Yes |
| Frequency Response | 18Hz - 21kHz (-6dB) (Manufacturer specified) | 50Hz - 20kHz (Manufacturer specified) |
| Bluetooth Version | 5.0 | 4.0 |
| Enclosure | - | 2-way active, MDF cabinet |
| Country | - | Canada (design) |
| Subwoofer Output | - | Yes |
| Outputs | - | Subwoofer |
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