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 Ascend Acoustics Sierra Duo V2 Ribbon ranks #53, rated 4.1/5, and costs $1,688, which makes this an easy call rather than a real tradeoff.
Why pick the KEF Q Concerto Meta: 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 Ascend Acoustics Sierra Duo V2 Ribbon: High-quality manufacturer NFS data gives the RAAL version a low 2.09 sound-power directivity-index standard deviation, the most consistent dispersion of the two Duo V2 variants. The catch: Bass measures 79.1Hz at -3dB, 64.5Hz at -6dB, and 43.9Hz at -12dB, and the 0.645dB on-axis average absolute deviation trails the Titan version’s 0.585dB.
Buy the KEF Q Concerto Meta. It is rated higher for sound quality than the Ascend Acoustics Sierra Duo V2 Ribbon and costs less, so only choose the other one for a particular feature it does better.
Looking for alternatives? See the complete Passive Home rankings.
Specifications Side By Side
| KEF Q Concerto Meta | Ascend Acoustics Sierra Duo V2 Ribbon | |
|---|---|---|
| Price | $1,399.99 per pair | $1,688 per pair |
| Ranked | #11 of 131 in Large Size Bookshelf Speakers | #53 of 131 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 35Hz (measured, Erin’s Audio Corner) | approximately 50Hz (measured, spinorama.org) |
| Bass Extension (-3dB) | 53Hz (measured, Erin’s Audio Corner) | 79.1Hz (measured, spinorama.org) |
| Dimensions | 16.3”H x 8.3”W x 12.4”D (414 x 210.8 x 315 mm) | 16.25 x 5.75 x 6 in each |
| Impedance | 4 ohms nominal (3.3 ohms minimum above 80Hz, measured by Erin’s Audio Corner) | 8 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 | Two 4.5-inch glass-fiber woofers; custom RAAL true ribbon tweeter |
| Sensitivity | 84.2dB (measured average, Erin’s Audio Corner) | 86dB at 2.83V/1m anechoic |
| Weight | 20.9 lbs (9.5 kg) each | 12.3 lbs (5.6 kg) each |
| Woofer Cabinet | ported, rear | - |
| Spinorama Preference Score | 6.01 | 4.53 |
| Spinorama Preference Score with Perfect Sub | 7.71 | 7.15 |
| DIY Kit | No | No |
Related Speaker Comparisons
More worthwhile head-to-heads for 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
- KEF Q Concerto Meta vs AsciLab C6B
Prices on this page were last checked September 26, 2026 at 11:14 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.
As an eBay Partner, we may be compensated if you make a purchase.
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
- See all 71 comparisons
Ascend Acoustics Sierra Duo V2 Ribbon: $1,688 per pair Ascend Acoustics eBay
Older model: the Ascend Sierra Luna Duo (rated 1.2/5).
Pros: High-quality manufacturer NFS data gives the RAAL version a low 2.09 sound-power directivity-index standard deviation, the most consistent dispersion of the two Duo V2 variants. Its preference score improves from 4.53 to 7.15 with a subwoofer, while the compact bamboo cabinet, dual front slots, and vertical or horizontal mounting options are unusually flexible. Measured bass extension of 79.1Hz (-3dB).
Cons: Bass measures 79.1Hz at -3dB, 64.5Hz at -6dB, and 43.9Hz at -12dB, and the 0.645dB on-axis average absolute deviation trails the Titan version’s 0.585dB. The 0.410 normalized listening-window deviation and narrow horizontal dispersion when the MTM cabinet is placed horizontally make vertical orientation preferable; a subwoofer is strongly recommended.
Full Ascend Acoustics Sierra Duo V2 Ribbon review and specifications →
| Bass Extension (-10dB) | approximately 50Hz (measured, spinorama.org) |
|---|---|
| Bass Extension (-3dB) | 79.1Hz (measured, spinorama.org) |
| DIY Kit | No |
| Dimensions | 16.25 x 5.75 x 6 in each |
| Drivers | Two 4.5-inch glass-fiber woofers; custom RAAL true ribbon tweeter |
| Impedance | 8 ohms nominal |
| Sensitivity | 86dB at 2.83V/1m anechoic |
| Spinorama Preference Score | 4.53 |
| Spinorama Preference Score with Perfect Sub | 7.15 |
| Weight | 12.3 lbs (5.6 kg) each |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Ascend Acoustics Sierra Duo V2 Ribbon vs ELAC DBR62
- Ascend Acoustics Sierra Duo V2 Ribbon vs ELAC Debut 3.0 DB63
- Ascend Acoustics Sierra Duo V2 Ribbon vs Klipsch RP-600M II
- Ascend Acoustics Sierra Duo V2 Ribbon vs Wharfedale Linton 85
- Ascend Acoustics Sierra Duo V2 Ribbon vs Wharfedale Super Linton
- Ascend Acoustics Sierra Duo V2 Ribbon vs KEF R3
- Ascend Acoustics Sierra Duo V2 Ribbon vs KEF R3 Meta