Short answer: the KEF Q Concerto Meta. It ranks #11 of 222 bookshelf speakers by sound quality, rated 4.6/5, at $1,399.99; the Ascend Acoustics Sierra-2EX V2 ranks #41, rated 4.3/5, and costs $1,748, so there is not much of a tradeoff to weigh.
The case for the KEF Q Concerto Meta: A neutral three way bookshelf speaker that sounds consistent from seat to seat, with smooth treble that many rivals at its price lack. The catch: Radiation pattern measures about ±50°, narrower than the reviewer’s preferred ±60° for a stronger sense of envelopment.
The case for the Ascend Acoustics Sierra-2EX V2: A ribbon tweeter bookshelf speaker with hand matched pairs, a frequency response printout for each unit, and a long seven year warranty. The tradeoff: On-axis response is relatively uneven, with an average deviation of about 0.45dB, so a listener sitting dead center may notice more unevenness than with smoother AsciLab or Ascend towers.
Buy the KEF Q Concerto Meta. It is rated higher for sound quality than the Ascend Acoustics Sierra-2EX V2 and costs less, so only choose the other one for a particular feature it does better.
Want more options? Browse the full 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 ribbon tweeter bookshelf speaker with hand matched pairs, a frequency response printout for each unit, and a long seven year warranty.
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 | Ascend Acoustics Sierra-2EX V2 | |
|---|---|---|
| Price | $1,399.99 per pair | $1,748 per pair |
| Ranked | #11 of 222 in Large Size Bookshelf Speakers | #41 of 222 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 35Hz (measured, Erin’s Audio Corner) | 42.4Hz (measured, spinorama.org vendor data) |
| Bass Extension (-3dB) | 53Hz (measured, Erin’s Audio Corner) | 58.6Hz (measured, spinorama.org vendor data) |
| Dimensions | 16.3”H x 8.3”W x 12.4”D (414 x 210.8 x 315 mm) | 14.3”H x 7.5”W x 10.5”D (362 x 190 x 267 mm) |
| 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 | RAAL 10mm true ribbon tweeter, 6” SEAS Excel Curv cone woofer |
| Sensitivity | 84.2dB (measured average, Erin’s Audio Corner) | 85dB @ 2.83V/1m anechoic (manufacturer) |
| Weight | 20.9 lbs (9.5 kg) each | 20.1 lbs (9.1 kg) each |
| Woofer Cabinet | ported, rear | - |
| Spinorama Preference Score | 6.01 | 5.88 |
| Spinorama Preference Score with Perfect Sub | 7.71 | 7.95 |
| DIY Kit | No | No |
| Enclosure | - | ported |
| Power Handling | - | 150W continuous, 300W peak |
| Frequency Response | - | 51-27,000Hz +/-3dB (manufacturer) |
| Bass Extension (-6dB) | - | 51.3Hz (measured, spinorama.org vendor data) |
| Warranty | - | 7 years parts and labor |
| Country | - | United States |
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