Short answer: the Radiant Acoustics Clarity 6.2 if sound quality matters most, the Ascend Acoustics Sierra-2EX V2 if price matters most. The Radiant Acoustics Clarity 6.2 ranks #28 of 222 bookshelf speakers, rated 4.4/5, at $4,500. The Ascend Acoustics Sierra-2EX V2 ranks #42, rated 4.3/5, at $1,748, $2,752 cheaper.
What the Ascend Acoustics Sierra-2EX V2 does well: A RAAL true ribbon tweeter is paired with a custom SEAS Excel Curv woofer, with the crossover optimized against Klippel NFS measurement data. Watch for: 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 case for the Radiant Acoustics Clarity 6.2: Custom AMT (Air Motion Transformer) tweeter paired with a 6.5” Purifi Eikona midrange and dual Purifi passive radiators in a passive-radiator enclosure, crossed over at 2.4kHz. The catch: Needs a fairly specific setup to sound its best: about 15-20° of toe-out (per the manufacturer’s own recommendation) and roughly 2 feet from the rear wall; pointed straight on-axis, the treble reads as noticeably elevated.
Buy the Ascend Acoustics Sierra-2EX V2 if the price matters more than sound quality. Buy the Radiant Acoustics Clarity 6.2 if sound quality matters more than the price.
Looking for alternatives? See the complete Passive Home rankings.
A RAAL true ribbon tweeter is paired with a custom SEAS Excel Curv woofer, with the crossover optimized against Klippel NFS measurement data.
Ascend Acoustics $1,748 eBay
Custom AMT (Air Motion Transformer) tweeter paired with a 6.5” Purifi Eikona midrange and dual Purifi passive radiators in a passive-radiator enclosure, crossed over at 2.4kHz.
Radiant Acoustics $4500 eBayPrices on this page were last checked October 16, 2026 at 5:46 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 | Radiant Acoustics Clarity 6.2 | |
|---|---|---|
| Price | $1,748 per pair | $4500 per pair |
| Ranked | #42 of 222 in Large Size Bookshelf Speakers | #28 of 222 in Large Size Bookshelf Speakers |
| Enclosure | ported | - |
| Drivers | RAAL 10mm true ribbon tweeter, 6” SEAS Excel Curv cone woofer | 6.5” PURIFI USHINDI woofer, Custom AMT (Air Motion Transformer) tweeter |
| Dimensions | 14.3”H x 7.5”W x 10.5”D (362 x 190 x 267 mm) | 14.3”H x 8.7”W x 10.5”D (363.2 x 221 x 266.7 mm) |
| Weight | 20.1 lbs (9.1 kg) each | 23.8 lbs (10.8 kg) each |
| Sensitivity | 85dB @ 2.83V/1m anechoic (manufacturer) | 84.3dB (measured, Erin’s Audio Corner) |
| Impedance | 8 ohms nominal | 4 ohms nominal (2.1 ohms minimum above 80Hz, 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) | 55Hz (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 | 5.97 |
| Spinorama Preference Score with Perfect Sub | 7.95 | 7.75 |
| DIY Kit | No | No |
| Woofer Cabinet | - | passive radiator |
Frequency Response Compared
Both speakers’ spinorama measurements, overlaid. A flatter line is more neutral: peaks sound forward or harsh, dips sound recessed. Each curve is shifted so its average from 300 Hz to 3 kHz sits at 0 dB, so loudness differences between the two are removed and only the shape is compared. The two were measured by different sources, so small differences, especially in the bass, can come from the measurement setup rather than the speakers.
Measurement data: Ascend Acoustics Sierra-2EX V2 (measured by the manufacturer) and Radiant Acoustics Clarity 6.2 (measured by Erin’s Audio Corner), via spinorama.org.
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