Short answer: the AsciLab F6Bs. It ranks #20 of 222 bookshelf speakers by sound quality (rated 4.5/5); the Radiant Acoustics Clarity 6.2 ranks #28 (rated 4.4/5).
Why pick the AsciLab F6Bs: A slimmer, sealed, VESA 100 wall mountable variant of the AsciLab F6B, trading the AsciLab F6B’s passive radiator for a shallower 15.4cm deep cabinet that can go straight on a wall bracket. The catch: AsciLab’s own site shows the F6Bs sold out, though it remains in stock through resellers like Audiophonics and Tested Audio.
The Radiant Acoustics Clarity 6.2 is the more accurate, deeper-bass option. 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. Its measured preference score, a predictor of how neutral it sounds, is 5.97 against 5.24 for the AsciLab F6Bs. Its bass reaches about 55Hz before falling 3dB, against 82Hz for the AsciLab F6Bs. Watch for: 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 AsciLab F6Bs. It is rated higher for sound quality than the Radiant Acoustics Clarity 6.2.
Want more options? Browse the full Passive Home rankings.
A slimmer, sealed, VESA 100 wall mountable variant of the AsciLab F6B, trading the AsciLab F6B’s passive radiator for a shallower 15.4cm deep cabinet that can go straight on a wall bracket.
Audiophonics 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
| AsciLab F6Bs | Radiant Acoustics Clarity 6.2 | |
|---|---|---|
| Price | €799 per pair | $4500 per pair |
| Ranked | #20 of 222 in Large Size Bookshelf Speakers | #28 of 222 in Large Size Bookshelf Speakers |
| Enclosure | sealed | - |
| Drivers | 1” aluminum dome tweeter with waveguide and phase plug, 6” fiber cone woofer | 6.5” PURIFI USHINDI woofer, Custom AMT (Air Motion Transformer) tweeter |
| Dimensions | 14.5”H x 8”W x 6.1”D (368 x 203 x 154 mm) | 14.3”H x 8.7”W x 10.5”D (363.2 x 221 x 266.7 mm) |
| Weight | 12.3 lbs (5.6 kg) each | 23.8 lbs (10.8 kg) each |
| Sensitivity | 85.2dB @ 2.83V/1m (measured, Audio Science Review) | 84.3dB (measured, Erin’s Audio Corner) |
| Impedance | 4 ohms nominal, 3.7 ohms minimum | 4 ohms nominal (2.1 ohms minimum above 80Hz, measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 82.0Hz (measured, Audio Science Review) | 55Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-10dB) | 50.1Hz (measured, Audio Science Review) | 32Hz (measured, Erin’s Audio Corner) |
| Crossover Frequency | 1kHz | - |
| Mounting | VESA 100 wall mount compatible | - |
| Warranty | 2 years | - |
| Country | South Korea | - |
| Maximum SPL | 100dB full bandwidth, 102dB above 100Hz (manufacturer specified) | - |
| Spinorama Preference Score | 5.24 | 5.97 |
| Spinorama Preference Score with Perfect Sub | 7.90 | 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: AsciLab F6Bs (measured by Audio Science Review) and Radiant Acoustics Clarity 6.2 (measured by Erin’s Audio Corner), via spinorama.org.
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