Short answer: the Radiant Acoustics Clarity 6.2. It ranks #28 of 222 bookshelf speakers by sound quality, rated 4.4/5, at $4,500. The ATC SCM19 ranks #209, rated 2.4/5, at $3,750, $750 cheaper, not enough of a saving to outweigh the sound-quality gap.
The Radiant Acoustics Clarity 6.2 is the more accurate option. A Purifi driver bookshelf speaker with an AMT tweeter, rigid cabinet, non-fatiguing sound, and precise, well focused imaging. Its measured preference score, a predictor of how neutral it sounds, is 5.97 against 4.61 for the ATC SCM19. The tradeoff: 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.
Why pick the ATC SCM19: A heavy, sealed pro style ATC bookshelf speaker with a very dense cabinet and low distortion at high volume. The catch: Some stored energy resonance around 500-700Hz, 4dB bump around 700Hz.
Buy the Radiant Acoustics Clarity 6.2. It is rated higher for sound quality, and the $750 saving on the ATC SCM19 is not enough to make up the difference.
Looking for alternatives? See the complete Passive Home rankings.
A Purifi driver bookshelf speaker with an AMT tweeter, rigid cabinet, non-fatiguing sound, and precise, well focused imaging.
A heavy, sealed pro style ATC bookshelf speaker with a very dense cabinet and low distortion at high volume.
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Specifications Side By Side
| Radiant Acoustics Clarity 6.2 | ATC SCM19 | |
|---|---|---|
| Price | $4500 per pair | $3750 per pair |
| Ranked | #28 of 222 in Large Size Bookshelf Speakers | #209 of 222 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 32Hz (measured, Erin’s Audio Corner) | 34Hz (measured, Audio Science Review) |
| Bass Extension (-3dB) | 55Hz (measured, Erin’s Audio Corner) | 60Hz (measured, Audio Science Review) |
| Dimensions | 14.3”H x 8.7”W x 10.5”D (363.2 x 221 x 266.7 mm) | 17.2”H x 10.4”W x 11.8”D (436.9 x 264.2 x 299.7 mm) |
| Impedance | 4 ohms nominal (2.1 ohms minimum above 80Hz, measured, Erin’s Audio Corner) | 6 ohms |
| Sensitivity | 84.3dB (measured, Erin’s Audio Corner) | 85dB (measured, Audio Science Review) |
| Drivers | 6.5” PURIFI USHINDI woofer, Custom AMT (Air Motion Transformer) tweeter | 5.9” Super Linear Magnet cone woofer, 1” soft dome tweeter |
| Weight | 23.8 lbs (10.8 kg) each | 39.2 lbs (17.8 kg) each |
| Woofer Cabinet | passive radiator | sealed |
| Spinorama Preference Score | 5.97 | 4.61 |
| Spinorama Preference Score with Perfect Sub | 7.75 | 7.03 |
| DIY Kit | No | No |
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