Short answer: the KEF Q Concerto Meta. It ranks #11 of 222 bookshelf speakers by sound quality (rated 4.6/5); the AsciLab F6Bs ranks #20 (rated 4.5/5).
The KEF Q Concerto Meta is the more accurate, deeper-bass choice. A neutral three way bookshelf speaker that sounds consistent from seat to seat, with smooth treble that many rivals at its price lack. Its measured preference score, a predictor of how neutral it sounds, is 6.01 against 5.24 for the AsciLab F6Bs. Its bass reaches about 53Hz before falling 3dB, against 82Hz for the AsciLab F6Bs. The catch: Radiation pattern measures about ±50°, narrower than the reviewer’s preferred ±60° for a stronger sense of envelopment.
Why pick the AsciLab F6Bs: A slim, sealed bookshelf speaker that mounts flat on a wall bracket, with accurate sound and wide, even dispersion for a great price. The catch: AsciLab’s own site shows the F6Bs sold out, though it remains in stock through resellers like Audiophonics and Tested Audio.
Buy the KEF Q Concerto Meta. It is rated higher for sound quality than the AsciLab F6Bs.
Looking for alternatives? See the complete Passive Home rankings.
A neutral three way bookshelf speaker that sounds consistent from seat to seat, with smooth treble that many rivals at its price lack.
A slim, sealed bookshelf speaker that mounts flat on a wall bracket, with accurate sound and wide, even dispersion for a great price.
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
| KEF Q Concerto Meta | AsciLab F6Bs | |
|---|---|---|
| Price | $1,399.99 per pair | €799 per pair |
| Ranked | #11 of 222 in Large Size Bookshelf Speakers | #20 of 222 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 35Hz (measured, Erin’s Audio Corner) | 50.1Hz (measured, Audio Science Review) |
| Bass Extension (-3dB) | 53Hz (measured, Erin’s Audio Corner) | 82.0Hz (measured, Audio Science Review) |
| Dimensions | 16.3”H x 8.3”W x 12.4”D (414 x 210.8 x 315 mm) | 14.5”H x 8”W x 6.1”D (368 x 203 x 154 mm) |
| Impedance | 4 ohms nominal (3.3 ohms minimum above 80Hz, measured by Erin’s Audio Corner) | 4 ohms nominal, 3.7 ohms minimum |
| Drivers | 165 mm (6.5 in.) hybrid aluminium cone woofer, 100 mm (4 in.) aluminium cone midrange, 19 mm (0.75 in.) vented aluminium dome with MAT tweeter | 1” aluminum dome tweeter with waveguide and phase plug, 6” fiber cone woofer |
| Sensitivity | 84.2dB (measured average, Erin’s Audio Corner) | 85.2dB @ 2.83V/1m (measured, Audio Science Review) |
| Weight | 20.9 lbs (9.5 kg) each | 12.3 lbs (5.6 kg) each |
| Woofer Cabinet | ported, rear | - |
| Spinorama Preference Score | 6.01 | 5.24 |
| Spinorama Preference Score with Perfect Sub | 7.71 | 7.90 |
| DIY Kit | No | No |
| Enclosure | - | sealed |
| 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) |
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