Short answer: the AsciLab C6B. It ranks #6 of 222 bookshelf speakers by sound quality, rated 4.7/5, at $1,145; the Dynaudio Contour 20i ranks #96, rated 3.9/5, and costs $5,750, so there is little reason to consider the other one.
The AsciLab C6B is the better-sounding choice. Bookshelf speakers with very accurate sound and an unusually wide, stable soundstage, for any seating position. The tradeoff: Bass rolls off around 50Hz in-room (F3 54Hz, F10 35Hz), so a subwoofer is needed for real extension below that.
The case for the Dynaudio Contour 20i: Beautifully built bookshelf speakers with wide, spacious sound, clean output at high volume, and bass that blends easily near a wall. The tradeoff: 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 C6B. It is rated higher for sound quality than the Dynaudio Contour 20i and costs less, so it is the default pick unless a specific strength of the other one matters more to you.
Still deciding? The full Passive Home rankings cover every ranked option.
Bookshelf speakers with very accurate sound and an unusually wide, stable soundstage, for any seating position.
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 C6B | Dynaudio Contour 20i | |
|---|---|---|
| Price | $1145 per pair | $5750 per pair |
| Ranked | #6 of 222 in Large Size Bookshelf Speakers | #96 of 222 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 35Hz (measured, Erin’s Audio Corner) | 32Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 54Hz (measured, Erin’s Audio Corner) | 56Hz (measured, Erin’s Audio Corner) |
| Dimensions | 15.7”H x 8”W x 10.4”D (398.8 x 203.2 x 264.2 mm) | 17.4”H x 8.5”W x 14.2”D (442 x 215.9 x 360.7 mm) |
| Impedance | 4 ohms nominal, 2.6 ohms minimum (measured, Erin’s Audio Corner) | 4 ohms |
| Sensitivity | 85.6dB (measured, Erin’s Audio Corner) | 82.5dB |
| Drivers | 6” Aluminium Ceramic Cone with cast Aluminium Chassis woofer, 1” Aluminium Ceramic Dome tweeter | 18 cm MSP woofer, 28mm Esotar 2i with Hexis tweeter |
| Weight | 18.5 lbs (8.4 kg) each | 30.9 lbs (14 kg) each |
| Woofer Cabinet | passive radiator | ported, rear |
| Spinorama Preference Score | 6.33 | - |
| Spinorama Preference Score with Perfect Sub | 8.28 | - |
| DIY Kit | No | No |
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