Short answer: the AsciLab C6B. It ranks #11 of 131 large bookshelf speakers by sound quality, ahead of the KEF at #6, and it costs $254.99 less.
The AsciLab’s dispersion behaves in a way most two-way speakers don’t. Its horizontal radiation actually widens at higher frequencies instead of narrowing, keeping image focus and soundstage depth consistent whether the speakers are toed in or out, with a 5-10 degree sweet spot found in testing. Vertical radiation stays wide straight through the 2kHz crossover region too, so the sound doesn’t collapse when you stand up, unusual at this price. The KEF, by contrast, measures a narrower ±50° radiation pattern, tighter than the reviewer’s preferred ±60° for a strong sense of envelopment, and needs to be aimed closer to on-axis or its rolled-off top end starts to sound dark.
Distortion and value both favor the AsciLab. Its midrange and tweeter distortion stay very low even at 96dB, holding up against speakers several times its price in that regard, and reviewers have called it the best-value bookshelf speaker in its class. The KEF’s real strength is that its directivity holds remarkably steady from lower treble into upper treble, a range where many similarly priced speakers narrow sharply, and it was one of the reviewer’s top 10 picks under $1,500 in its own right.
Bass extension is essentially tied. Both roll off around the same point in-room, so neither has an edge that would justify choosing on bass alone. The AsciLab does dip to a lower minimum impedance (2.6 ohms versus the KEF’s 3.3 ohms), so it wants a solid 4-ohm-capable amplifier, ideally 100W or more.
Buy the AsciLab C6B. It ranks higher, costs less, and its dispersion characteristics are more forgiving of real-room placement.
Buy the KEF Q Concerto Meta only if you specifically prefer its brand ecosystem or the Crutchfield support and warranty path that comes with buying from an established retailer.
Still deciding? The full Passive Home rankings cover every ranked option.
Specifications Side By Side
| KEF Q Concerto Meta | AsciLab C6B | |
|---|---|---|
| Price | $1,399.99 per pair | $1145 per pair |
| Ranked | #11 of 131 in Large Size Bookshelf Speakers | #6 of 131 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 |
| Spinorama Preference Score | 6.01 | 6.33 |
| Spinorama Preference Score with Perfect Sub | 7.71 | 8.28 |
| DIY Kit | No | No |
Related Speaker Comparisons
More worthwhile head-to-heads for AsciLab C6B:
- AsciLab C6B vs Perlisten S4b
- AsciLab C6B vs KEF Reference 1 Meta
- AsciLab C6B vs GR-Research NX-Studio
- AsciLab C6B vs March Audio Sointuva AWG
- AsciLab C6B vs Audio First Cadentia 3
Prices on this page were last checked September 29, 2026 at 3:43 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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The Two Speakers In Full
KEF Q Concerto Meta: $1,399.99 per pair Amazon Crutchfield eBay
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. Measured bass extension of 53Hz (-3dB), with a measured sensitivity of 84.2dB.
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) |
| DIY Kit | No |
| 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) |
| Spinorama Preference Score | 6.01 |
| Spinorama Preference Score with Perfect Sub | 7.71 |
| Weight | 20.9 lbs (9.5 kg) each |
| Woofer Cabinet | ported, rear |
- Links
- Reviews, Comparisons and Sound Samples
- Erin’s Audio Corner: HiFi Perfection? KEF CONCERTO META Delivers! More from Erin’s Audio Corner →
- 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
- Erin’s Audio Corner Measurements (spinorama.org)
- Head-to-Head Comparisons
- KEF Q Concerto Meta vs KEF R3 Meta
- KEF Q Concerto Meta vs AsciLab F6B
- KEF Q Concerto Meta vs Wharfedale Aura 2
- KEF Q Concerto Meta vs Revel M106
- KEF Q Concerto Meta vs KEF R3
- KEF Q Concerto Meta vs Audio First Cadentia 3
- KEF Q Concerto Meta vs Buchardt Audio E50
- KEF Q Concerto Meta vs MoFi SourcePoint 8
- See all 72 comparisons
AsciLab C6B: $1145 per pair Ascilab eBay
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 $1145 shipped to the US, the reviewer calls it the best-value bookshelf speaker he’s tested, rivaling speakers 2-5x the price. Measured bass extension of 54Hz (-3dB), with a measured sensitivity of 85.6dB.
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 AsciLab’s list 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) |
| DIY Kit | No |
| 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) |
| Spinorama Preference Score | 6.33 |
| Spinorama Preference Score with Perfect Sub | 8.28 |
| Weight | 18.5 lbs (8.4 kg) each |
| Woofer Cabinet | passive radiator |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons