Short answer: the AsciLab F6Bs. It ranks #20 of 222 bookshelf speakers by sound quality (rated 4.5/5); the Dynaudio Contour 20i ranks #96 (rated 3.9/5).
The AsciLab F6Bs is the better-sounding pick. A slim, sealed bookshelf speaker that mounts flat on a wall bracket, with accurate sound and wide, even dispersion for a great price. The tradeoff: AsciLab’s own site shows the F6Bs sold out, though it remains in stock through resellers like Audiophonics and Tested Audio.
The Dynaudio Contour 20i is the deeper-bass choice. Beautifully built bookshelf speakers with wide, spacious sound, clean output at high volume, and bass that blends easily near a wall. Its bass reaches about 56Hz before falling 3dB, against 82Hz for the AsciLab F6Bs. The catch: Notably room-dependent: sounds too bright in the lower treble in smaller rooms with close sidewalls, needing sidewall absorption to sound neutral, while performing better in larger or more open rooms without that treatment.
Buy the AsciLab F6Bs. It is rated higher for sound quality than the Dynaudio Contour 20i.
Still deciding? The full Passive Home rankings cover every ranked option.
A slim, sealed bookshelf speaker that mounts flat on a wall bracket, with accurate sound and wide, even dispersion for a great price.
Beautifully built bookshelf speakers with wide, spacious sound, clean output at high volume, and bass that blends easily near a wall.
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
| AsciLab F6Bs | Dynaudio Contour 20i | |
|---|---|---|
| Price | €799 per pair | $5750 per pair |
| Ranked | #20 of 222 in Large Size Bookshelf Speakers | #96 of 222 in Large Size Bookshelf Speakers |
| Enclosure | sealed | - |
| Drivers | 1” aluminum dome tweeter with waveguide and phase plug, 6” fiber cone woofer | 18 cm MSP woofer, 28mm Esotar 2i with Hexis tweeter |
| Dimensions | 14.5”H x 8”W x 6.1”D (368 x 203 x 154 mm) | 17.4”H x 8.5”W x 14.2”D (442 x 215.9 x 360.7 mm) |
| Weight | 12.3 lbs (5.6 kg) each | 30.9 lbs (14 kg) each |
| Sensitivity | 85.2dB @ 2.83V/1m (measured, Audio Science Review) | 82.5dB |
| Impedance | 4 ohms nominal, 3.7 ohms minimum | 4 ohms |
| Bass Extension (-3dB) | 82.0Hz (measured, Audio Science Review) | 56Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-10dB) | 50.1Hz (measured, Audio Science Review) | 32Hz (measured, Erin’s Audio Corner) |
| Crossover Frequency | 1kHz | - |
| Mounting | VESA 100 wall mount compatible | - |
| Warranty | 2 years | - |
| Country | South Korea | - |
| Maximum SPL | 100dB full bandwidth, 102dB above 100Hz (manufacturer specified) | - |
| Spinorama Preference Score | 5.24 | - |
| Spinorama Preference Score with Perfect Sub | 7.90 | - |
| DIY Kit | No | No |
| Woofer Cabinet | - | ported, rear |
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