Short answer: the AsciLab C6B. It ranks #7 of 84 bookshelf speakers by sound quality at $1145; the KEF Q Concerto Meta ranks #11 and costs $1399.99, so there is not much of a tradeoff to weigh.
What the KEF Q Concerto Meta offers: Really good in-room neutrality with consistent horizontal directivity from seat to seat. Watch for: Radiation pattern measures about ±50°, narrower than the reviewer’s preferred ±60° for a stronger sense of envelopment.
What the AsciLab C6B offers: Two-way design pairing a 1” aluminum ceramic dome tweeter on a large waveguide with a 6” aluminum ceramic cone woofer, crossed over at 1.1kHz, plus a rear passive radiator. Watch for: Bass rolls off around 50Hz in-room (F3 54Hz, F10 35Hz), so a subwoofer is needed for real extension below that.
Buy the AsciLab C6B. It ranks higher for sound quality than the KEF Q Concerto Meta and costs less, so there is no real case for the other one.
Specifications Side By Side
| KEF Q Concerto Meta | AsciLab C6B | |
|---|---|---|
| Price | $1,399.99 | $1145 |
| Ranked | #11 of 84 in Large Size Bookshelf Speakers | #7 of 84 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 35Hz (measured, Erin’s Audio Corner) | 35Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 53Hz (measured, Erin’s Audio Corner) | 54Hz (measured, Erin’s Audio Corner) |
| Dimensions | 16.3"H x 8.3"W x 12.4"D (414 x 210.8 x 315 mm) | 15.7"H x 8"W x 10.4"D (398.8 x 203.2 x 264.2 mm) |
| Impedance | 4 ohms nominal (3.3 ohms minimum above 80Hz, measured by Erin’s Audio Corner) | 4 ohms nominal, 2.6 ohms minimum (measured, Erin’s Audio Corner) |
| 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 | 6" Aluminium Ceramic Cone with cast Aluminium Chassis woofer, 1" Aluminium Ceramic Dome tweeter |
| Sensitivity | 84.2dB (measured average, Erin’s Audio Corner) | 85.6dB (measured, Erin’s Audio Corner) |
| Weight | 20.9 lbs / 9.5 kg each | 18.5 lbs / 8.4 kg each |
| Woofer Cabinet | ported, rear | passive radiator |
Related Speaker Comparisons
More useful head-to-heads from the same speaker class:
- AsciLab F6B vs Sonus Faber Lumina II
- KEF R3 Meta vs Klipsch RP-600M II
- KEF R3 Meta vs SVS Prime Bookshelf
- AsciLab C6B vs GR-Research X-LS Encore
- AsciLab C6B vs GR-Research NX-Bravo
The Two Speakers In Full
KEF Q Concerto Meta: $1,399.99 Amazon Crutchfield
Pros: Really good in-room neutrality with consistent horizontal directivity from seat to seat. Directivity holds remarkably steady from lower treble into upper treble, where many similarly-priced speakers narrow sharply as frequency rises - one of the reviewer’s top 10 picks under $1,500.
Cons: Radiation pattern measures about ±50°, narrower than the reviewer’s preferred ±60° for a stronger sense of envelopment. Needs to be pointed closer to on-axis rather than heavily toed out - combined with its rolled-off, shelved-down top end, too much toe-out makes it sound noticeably dark.
Full KEF Q Concerto Meta review and specifications →
| Bass Extension (-10dB) | 35Hz (measured, Erin's Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 53Hz (measured, Erin's Audio Corner) |
| Dimensions | 16.3"H x 8.3"W x 12.4"D (414 x 210.8 x 315 mm) |
| 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 |
| Impedance | 4 ohms nominal (3.3 ohms minimum above 80Hz, measured by Erin's Audio Corner) |
| Sensitivity | 84.2dB (measured average, Erin's Audio Corner) |
| Weight | 20.9 lbs / 9.5 kg each |
| Woofer Cabinet | ported, rear |
As an eBay Partner, we may be compensated if you make a purchase.
- Links
- Reviews, Comparisons and Sound Samples
- Erin’s Audio Corner: HiFi Perfection? KEF CONCERTO META Delivers!
- Erin’s Audio Corner Website KEF Q Concerto Meta
- Erin’s Audio Corner: I Tested 250 Speakers So You Don’t Have To!
- Erin’s Audio Corner: HiFi Perfection? KEF CONCERTO META Delivers!
- Erin’s Audio Corner: My Absolute Favorite Products of 2024 Revealed
- Reddit Search for KEF Q Concerto Meta Review
- Head-to-Head Comparisons
- KEF Q Concerto Meta vs KEF R3 Meta
- KEF Q Concerto Meta vs Wharfedale Aura 2
- KEF Q Concerto Meta vs MoFi SourcePoint 8
- KEF Q Concerto Meta vs March Audio Sointuva AWG
- KEF Q Concerto Meta vs Wharfedale Super Linton
- KEF Q Concerto Meta vs GR-Research NX-Bravo
- KEF Q Concerto Meta vs MoFi SourcePoint 10
- KEF Q Concerto Meta vs Wharfedale Linton 85
- See all 14 comparisons
AsciLab C6B: $1145 Ascilab
Pros: Two-way design pairing a 1” aluminum ceramic dome tweeter on a large waveguide with a 6” aluminum ceramic cone woofer, crossed over at 1.1kHz, plus a rear passive radiator. Unusual trait: horizontal radiation actually widens at higher frequencies instead of narrowing like most two-way designs, which keeps image focus and soundstage depth consistent whether you toe the speakers in or out (5-10° off-axis was the sweet spot in testing). Vertical radiation also stays wide straight through the 2kHz crossover region, so the sound doesn’t collapse when standing up - unusual at this price. CA2034 measurements show strong on-axis linearity, listening window, early reflections, and directivity. Midrange and tweeter distortion stay very low even at 96dB, holding up against a $5,900 Arendal speaker in that regard despite roughly a 5x price gap. At $935 (about $1,135 shipped to the US), the reviewer calls it the best-value bookshelf speaker he’s tested, rivaling speakers 2-5x the price.
Cons: Bass rolls off around 50Hz in-room (F3 54Hz, F10 35Hz), so a subwoofer is needed for real extension below that. Low-frequency harmonic distortion increases substantially at 96dB versus 86dB, though it’s second-order and less audible than it looks on paper. Minimum impedance dips to 2.6 ohms (EPDR as low as 1.2 ohms), so it wants an amplifier comfortable driving 4-ohm loads, ideally 100W or more. At 102dB, compression noticeably eats into midrange, bass, and some treble output. Shipping to the US adds roughly $200 on top of the $935 price. Against the reviewer’s reference Audiofirst Fidelia at a similar price, has slightly less lower-midrange body (about 1dB difference) and a smaller perceived soundstage size.
Full AsciLab C6B review and specifications →
| Bass Extension (-10dB) | 35Hz (measured, Erin's Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 54Hz (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) |
| Drivers | 6" Aluminium Ceramic Cone with cast Aluminium Chassis woofer, 1" Aluminium Ceramic Dome tweeter |
| Impedance | 4 ohms nominal, 2.6 ohms minimum (measured, Erin's Audio Corner) |
| Sensitivity | 85.6dB (measured, Erin's Audio Corner) |
| Weight | 18.5 lbs / 8.4 kg each |
| Woofer Cabinet | passive radiator |
As an eBay Partner, we may be compensated if you make a purchase.
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- AsciLab C6B vs March Audio Sointuva AWG
- AsciLab C6B vs KEF R3 Meta
- AsciLab C6B vs GR-Research NX-Studio
- AsciLab C6B vs KEF Reference 1 Meta
- AsciLab C6B vs MoFi SourcePoint 8
- AsciLab C6B vs GR-Research NX-Bravo
- AsciLab C6B vs MoFi SourcePoint 10
- AsciLab C6B vs Wharfedale Linton 85
- See all 15 comparisons