Short answer: the Devialet Phantom Ultimate 98dB for better sound quality, the Audioengine HD6 for the lower price. The Devialet Phantom II 98 dB ranks higher than the Audioengine HD6 (#11 vs #79 of 108 powered bookshelf speakers) but is discontinued. Its replacement, the Devialet Phantom Ultimate 98dB, is rated 4.4/5 at $3,998; the Audioengine HD6 is rated 3.3/5 at $1,048, $2,950 cheaper.
The Devialet Phantom II 98 dB is the better-sounding choice. A compact wireless streaming speaker with startlingly deep bass for its size and an even, well balanced sound. The tradeoff: Small-enclosure bass extension at the measurement level does not guarantee the same response at high volume.
Why pick the Audioengine HD6: A self-contained powered stereo pair with Bluetooth, analog and optical inputs, and an RCA output, no separate amplifier needed. It supports aptX HD Bluetooth, which the Devialet Phantom II 98 dB lacks. It keeps a wired aux input, which the Devialet Phantom II 98 dB lacks. The tradeoff: Listening impressions describe bass and treble emphasis with a recessed midrange, which may suit casual listening better than neutral monitoring.
Buy the Audioengine HD6 if price matters most. For better sound quality, the Devialet Phantom Ultimate 98dB, the replacement for the discontinued Devialet Phantom II 98 dB, is rated higher but costs $3,998.
Looking for alternatives? See the complete Powered Home rankings.
A compact wireless streaming speaker with startlingly deep bass for its size and an even, well balanced sound.
A self-contained powered stereo pair with Bluetooth, analog and optical inputs, and an RCA output, no separate amplifier needed.
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 | Audioengine HD6 | |
|---|---|---|
| Price | $2,998 per pair Discontinued | $1,048.00 per pair |
| Ranked | #11 of 108 in Medium Size Powered Bookshelf Speakers | #79 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 | 5.5” (140mm) woofer |
| Inputs | Wi-Fi, Ethernet, Bluetooth, AirPlay 2, Spotify Connect, UPnP, Roon Ready, analog/optical combo jack | Bluetooth, Aux, RCA Input, Digital Optical |
| Bluetooth Codecs | SBC, AAC | SBC, AAC, aptX, aptX HD |
| Amplifier Power | 400W RMS each | 50w RMS Per Speaker |
| Dimensions | 6.6 x 6.2 x 8.6 in each | 11.7”H x 7.2”W x 10”D (298.4 x 184.1 x 254 mm) |
| Weight | 9.5 lbs (4.3 kg) each | 17.4 lbs (7.9 kg) |
| Maximum SPL | 98dB at 1m each (manufacturer specified) | - |
| Spinorama Preference Score | 6.87 | - |
| Spinorama Preference Score with Perfect Sub | 7.95 | - |
| 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 | Yes |
| Bluetooth | Yes | Yes |
| Frequency Response | 18Hz - 21kHz (-6dB) (Manufacturer specified) | 45Hz-40kHz (-3dB) (Manufacturer specified) |
| Bluetooth Version | 5.0 | 5.0 |
| Outputs | - | RCA variable output (subwoofer) |
| App | - | No |
| EQ | - | No |
| Subwoofer Output | - | Yes |
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