Short answer: the KEF Reference 1 Meta on measured sound quality, the Ascend Acoustics Sierra-2EX V2 on price. The KEF Reference 1 Meta ranks #3 of 222 bookshelf speakers, rated 4.8/5, at $9,999.98. The Ascend Acoustics Sierra-2EX V2 ranks #41, rated 4.3/5, at $1,748, $8,251.98 cheaper.
What the Ascend Acoustics Sierra-2EX V2 does well: 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.
The KEF Reference 1 Meta is the more accurate, deeper-bass choice. Extremely accurate bookshelf speakers, with a superb three dimensional soundstage, no harshness, and tightly matched pairs. Its measured preference score, a predictor of how neutral it sounds, is 6.48 against 5.88 for the Ascend Acoustics Sierra-2EX V2. Its bass reaches about 52Hz before falling 3dB, against 58.6Hz for the Ascend Acoustics Sierra-2EX V2. The tradeoff: At roughly $10000/pair, nearly four times the cost of the similarly-sized KEF R3.
Buy the Ascend Acoustics Sierra-2EX V2 when the price outweighs sound quality for you, and the KEF Reference 1 Meta when sound quality outweighs the price instead.
Still deciding? The full Passive Home rankings cover every ranked option.
A ribbon tweeter bookshelf speaker with hand matched pairs, a frequency response printout for each unit, and a long seven year warranty.
Extremely accurate bookshelf speakers, with a superb three dimensional soundstage, no harshness, and tightly matched pairs.
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
| Ascend Acoustics Sierra-2EX V2 | KEF Reference 1 Meta | |
|---|---|---|
| Price | $1,748 per pair | $9999.98 per pair |
| Ranked | #41 of 222 in Large Size Bookshelf Speakers | #3 of 222 in Large Size Bookshelf Speakers |
| Enclosure | ported | - |
| Drivers | RAAL 10mm true ribbon tweeter, 6” SEAS Excel Curv cone woofer | 165 mm (6.5 in.) aluminium cone woofer, 125 mm (5 in.) aluminium cone midrange, 25 mm (1 in.) aluminium dome with MAT tweeter |
| Dimensions | 14.3”H x 7.5”W x 10.5”D (362 x 190 x 267 mm) | 17.3”H x 8.1”W x 16.6”D (439.4 x 205.7 x 421.6 mm) |
| Weight | 20.1 lbs (9.1 kg) each | 40.1 lbs (18.2 kg) each |
| Sensitivity | 85dB @ 2.83V/1m anechoic (manufacturer) | 82.5dB (measured average, Erin’s Audio Corner) |
| Impedance | 8 ohms nominal | 4 ohms nominal, 2.9 ohms minimum (measured, Erin’s Audio Corner) |
| Power Handling | 150W continuous, 300W peak | - |
| Frequency Response | 51-27,000Hz +/-3dB (manufacturer) | - |
| Bass Extension (-6dB) | 51.3Hz (measured, spinorama.org vendor data) | - |
| Bass Extension (-3dB) | 58.6Hz (measured, spinorama.org vendor data) | 52Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-10dB) | 42.4Hz (measured, spinorama.org vendor data) | 32Hz (measured, Erin’s Audio Corner) |
| Warranty | 7 years parts and labor | - |
| Country | United States | - |
| Spinorama Preference Score | 5.88 | 6.48 |
| Spinorama Preference Score with Perfect Sub | 7.95 | 8.29 |
| DIY Kit | No | No |
| Woofer Cabinet | - | ported, rear |
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