Short answer: the KEF LS LUXE. It ranks #42 of 118 powered bookshelf speakers by sound quality (rated 4.4/5) at $3,999.99 and is still sold new; the Devialet Phantom I ranks #83 (rated 4.0/5) and is discontinued, so it is only an option used. The Devialet Phantom I’s replacement, the Devialet Phantom Ultimate 108dB, is rated 4.4/5 at $7,998.
The KEF LS LUXE is the better-sounding choice. Flagship active wireless bookshelf created with Ross Lovegrove, featuring a 6.5-inch 12th-generation Uni-Q driver array with Metamaterial Absorption Technology (MAT). It keeps a wired aux input, which the Devialet Phantom I lacks. The catch: Premium $3,999.99 pricing and a sculptural 44.1 lbs (20 kg) system weight place it well above conventional desktop monitors, and the organic curved enclosure cannot be wall mounted.
The case for the Devialet Phantom I: Devialet’s spherical all-in-one wireless speaker with opposed woofers and a coaxial mid and tweeter. The catch: The measurements are Devialet’s own and stop at about 22Hz, so the true bass extension is not shown.
Buy the KEF LS LUXE. It is rated higher for sound quality; the Devialet Phantom I is no longer sold new.
About the ratings: the KEF LS LUXE’s rating is estimated from measured siblings and predecessors rather than its own measurements, with a likely range of 4.2 to 4.6, so this verdict could change once it is measured.
Still deciding? The full Powered Home rankings cover every ranked option.
Specifications Side By Side
| KEF LS LUXE | Devialet Phantom I | |
|---|---|---|
| Price | $3,999.99 per pair | $4,800 per pair Discontinued |
| Ranked | #42 of 118 in Large Size Powered Bookshelf Speakers Estimated | #83 of 118 in Large Size Powered Bookshelf Speakers |
| Amplifier Power | 380W (280W LF + 100W HF) | - |
| Enclosure | ported | - |
| Drivers | 1” vented aluminum dome with MAT tweeter, 6.5” aluminum cone woofer | Coaxial aluminium tweeter and midrange, 2x opposed woofers |
| Frequency Response | 42Hz - 28kHz (±3dB) (manufacturer specified) | - |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.3 | - |
| Wi-Fi | Yes | - |
| HDMI Input | Yes | No |
| Optical Input | Yes | Yes |
| Coaxial Input | Yes | No |
| Aux Input | Yes | No |
| Ethernet | Yes | - |
| Subwoofer Output | Yes | - |
| Stereo | pair | - |
| Dimensions | 13.2”H x 8.8”W x 11.7”D (336 x 223 x 298 mm) | 10”H x 9.9”W x 13.5”D (255 x 252 x 342 mm) |
| Weight | 44.1 lbs (20.0 kg) | 25.1 lbs (11.4 kg) each |
| Cabinet Color | Dusk Titanium, Eclipse Black, Mineral White | - |
| Country | United Kingdom | - |
| XLR Input | - | No |
| RCA Input | - | No |
| TRS Input | - | No |
| USB Input | - | No |
| AES Input | - | No |
| Spinorama Preference Score | - | 5.76 |
| Spinorama Preference Score with Perfect Sub | - | 6.57 |
| DIY Kit | - | No |
Related Speaker Comparisons
More worthwhile head-to-heads for KEF LS LUXE:
- PSI Audio A21-M vs KEF LS LUXE
- ADAM Audio S3H vs KEF LS LUXE
- Devialet Phantom Ultimate 108dB vs KEF LS LUXE
- KEF LS60 vs Devialet Phantom I
- Kali Audio LP-6 V2 vs Devialet Phantom Ultimate 108dB
Prices on this page were last checked October 11, 2026 at 4:59 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
KEF LS LUXE: $3,999.99 per pair Estimated Amazon KEF eBay
Pros: Flagship active wireless bookshelf created with Ross Lovegrove, featuring a 6.5-inch 12th-generation Uni-Q driver array with Metamaterial Absorption Technology (MAT). Bi-amplified with Class D on the woofer and Class AB on the 1-inch vented aluminum dome tweeter. Features KEF Velocity Control Technology (VECO), current-drive amplification, dual-band Wi-Fi (AirPlay 2, Chromecast, Roon Ready), Bluetooth 5.3, HDMI eARC, optical, coaxial, 3.5mm aux, and twin subwoofer outputs with high-pass filtering.
Cons: Premium $3,999.99 pricing and a sculptural 20 kg system weight place it well above conventional desktop monitors, and the organic curved enclosure cannot be wall mounted.
Full KEF LS LUXE review and specifications →
| Amplifier Power | 380W (280W LF + 100W HF) |
|---|---|
| Aux Input | Yes |
| Bluetooth | Yes |
| Bluetooth Version | 5.3 |
| Cabinet Color | Dusk Titanium, Eclipse Black, Mineral White |
| Coaxial Input | Yes |
| Country | United Kingdom |
| Dimensions | 13.2”H x 8.8”W x 11.7”D (336 x 223 x 298 mm) |
| Drivers | 1” vented aluminum dome with MAT tweeter, 6.5” aluminum cone woofer |
| Enclosure | ported |
| Ethernet | Yes |
| Frequency Response | 42Hz - 28kHz (±3dB) (manufacturer specified) |
| HDMI Input | Yes |
| Optical Input | Yes |
| Stereo | pair |
| Subwoofer Output | Yes |
| Weight | 44.1 lbs (20.0 kg) |
| Wi-Fi | Yes |
- 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
Devialet Phantom I: $4,800 per pair Discontinued eBay
Newer model: the Devialet Phantom Ultimate 108dB, ranked higher, rated 4.4/5, released Apr 2026. See every Devialet Phantom generation.
Pros: Devialet’s spherical all-in-one wireless speaker with opposed woofers and a coaxial mid and tweeter. Devialet’s measurements show bass holding up to the lowest frequency in the data (about 22Hz) and a preference score of 5.76 without a subwoofer, with consistent directivity (2.86dB directivity index deviation).
Cons: The measurements are Devialet’s own and stop at about 22Hz, so the true bass extension is not shown. The listening window spans 4.5dB from 300Hz to 5kHz. Replaced by the Phantom Ultimate. Discontinued.
Full Devialet Phantom I review and specifications →
| Released | Feb 2021 (5 years ago) |
|---|---|
| AES Input | No |
| Aux Input | No |
| Bluetooth | Yes |
| Coaxial Input | No |
| DIY Kit | No |
| Dimensions | 10”H x 9.9”W x 13.5”D (255 x 252 x 342 mm) |
| Drivers | Coaxial aluminium tweeter and midrange, 2x opposed woofers |
| HDMI Input | No |
| Optical Input | Yes |
| RCA Input | No |
| Spinorama Preference Score | 5.76 |
| Spinorama Preference Score with Perfect Sub | 6.57 |
| TRS Input | No |
| USB Input | No |
| Weight | 25.1 lbs (11.4 kg) each |
| XLR Input | No |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons