Short answer: the KEF Q Concerto Meta. It ranks #11 of 131 bookshelf speakers by sound quality, rated 4.6/5, at $1,399.99; the AsciLab A6B Passive ranks #18, rated 4.5/5, and costs $3,790, so there is not much of a tradeoff to weigh.
What the KEF Q Concerto Meta does well: 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.
Why pick the AsciLab A6B Passive: A Purifi 6.5 inch aluminum cone woofer works with two side mounted passive radiators and a Klippel NFS optimized crossover to reach a measured 41.0Hz extension point with an on axis slope of just -0.10dB per octave, essentially flat. Watch for: 4 ohm nominal impedance and 82dB sensitivity call for a robust amplifier.
Buy the KEF Q Concerto Meta. It is rated higher for sound quality than the AsciLab A6B Passive and costs less, which makes it the one to get unless you need something the other one does better.
Still deciding? The full Passive Home rankings cover every ranked option.
Specifications Side By Side
| KEF Q Concerto Meta | AsciLab A6B Passive | |
|---|---|---|
| Price | $1,399.99 per pair | €3,790 per pair |
| Ranked | #11 of 131 in Large Size Bookshelf Speakers | #18 of 131 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 35Hz (measured, Erin’s Audio Corner) | 34.7Hz (measured, Audio Science Review) |
| Bass Extension (-3dB) | 53Hz (measured, Erin’s Audio Corner) | 41.0Hz (measured, Audio Science Review) |
| Dimensions | 16.3”H x 8.3”W x 12.4”D (414 x 210.8 x 315 mm) | 15.9”H x 8.7”W x 11.8”D (405 x 220 x 300 mm) |
| Impedance | 4 ohms nominal (3.3 ohms minimum above 80Hz, measured by Erin’s Audio Corner) | 4 ohms nominal |
| 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” dome tweeter, 6.5” Purifi aluminum cone woofer, 2x 6.5” Purifi passive radiators |
| Sensitivity | 84.2dB (measured average, Erin’s Audio Corner) | 82dB @ 2.83V/1m |
| Weight | 20.9 lbs (9.5 kg) each | 27.1 lbs (12.3 kg) each |
| Woofer Cabinet | ported, rear | - |
| Spinorama Preference Score | 6.01 | 6.50 |
| Spinorama Preference Score with Perfect Sub | 7.71 | 8.24 |
| DIY Kit | No | No |
| Enclosure | - | sealed with passive radiators |
| Crossover Frequency | - | 1kHz |
| Warranty | - | 2 years |
| Country | - | South Korea |
| Maximum SPL | - | 102dB full bandwidth, 106dB above 100Hz (manufacturer specified) |
Related Speaker Comparisons
How KEF Q Concerto Meta compares with other leading options:
- TAD Compact Reference One (CR1TX) vs KEF Q Concerto Meta
- KEF Q Concerto Meta vs Perlisten S4b
- KEF Reference 1 Meta vs KEF Q Concerto Meta
- KEF Q Concerto Meta vs GR-Research NX-Studio
- KEF Q Concerto Meta vs March Audio Sointuva AWG
Prices on this page were last checked September 30, 2026 at 2:57 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 AsciLab C6B
- KEF Q Concerto Meta vs Buchardt Audio E50
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AsciLab A6B Passive: €3,790 per pair Audiophonics eBay
Pros: A Purifi 6.5 inch aluminum cone woofer works with two side mounted passive radiators and a Klippel NFS optimized crossover to reach a measured 41.0Hz extension point with an on axis slope of just -0.10dB per octave, essentially flat. On axis deviation measures 0.071dB average, the tightest figure of any speaker added to this catalog from spinorama.org’s current measurement set. Listening window smoothness (0.60) sits in line with AsciLab’s other highly rated bookshelf models already in this catalog. Measured bass extension of 41.0Hz (-3dB).
Cons: 4 ohm nominal impedance and 82dB sensitivity call for a robust amplifier. AsciLab and its resellers frequently list the A6B as sold out or preorder only, and reported prices vary widely by source and region, from roughly $2,900 to over $3,900 per pair, so confirm the current listing before buying. Tweeter material is described inconsistently between sources (alumina ceramic dome versus an SB Acoustics unit), worth verifying directly with a reseller if that detail matters to you.
Full AsciLab A6B Passive review and specifications →
| Bass Extension (-10dB) | 34.7Hz (measured, Audio Science Review) |
|---|---|
| Bass Extension (-3dB) | 41.0Hz (measured, Audio Science Review) |
| Country | South Korea |
| Crossover Frequency | 1kHz |
| DIY Kit | No |
| Dimensions | 15.9”H x 8.7”W x 11.8”D (405 x 220 x 300 mm) |
| Drivers | 1” dome tweeter, 6.5” Purifi aluminum cone woofer, 2x 6.5” Purifi passive radiators |
| Enclosure | sealed with passive radiators |
| Impedance | 4 ohms nominal |
| Maximum SPL | 102dB full bandwidth, 106dB above 100Hz (manufacturer specified) |
| Sensitivity | 82dB @ 2.83V/1m |
| Spinorama Preference Score | 6.50 |
| Spinorama Preference Score with Perfect Sub | 8.24 |
| Warranty | 2 years |
| Weight | 27.1 lbs (12.3 kg) each |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons