Short answer: the Radiant Acoustics Clarity 6.2 for better sound quality, the ATC SCM19 for the lower price. The Radiant Acoustics Clarity 6.2 ranks #27 of 130 bookshelf speakers at $4500. The ATC SCM19 ranks #119 at $3750, $750 cheaper.
What the Radiant Acoustics Clarity 6.2 offers: 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. Rigid cabinet construction (21mm MDF with a 15mm aluminum front baffle, extensive internal bracing) helps keep resonance in check. A deliberately rising on-axis response paired with narrowing directivity above about 2kHz yields a genuinely linear, non-fatiguing in-room sound rather than the “fake detail” of speakers with a straight treble boost. Excellent pair matching between units (within about 1dB), contributing to precise, well-focused imaging that clearly separated fine details in test tracks. In-room bass extension reaches a solid 40Hz with real kick-drum authority, not just sub-bass rumble. Class-leading dynamic range and compression performance - among the best the reviewer has measured at this price point. 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. Low impedance (2.1-ohm minimum, about 1-ohm minimum EPDR) demands an amplifier genuinely comfortable with 4-ohm-and-below loads. Soundstage width narrows above about 5kHz, even though the AMT tweeter itself is capable of wider dispersion. An unexplained resonance appears in harmonic distortion measurements on both units tested (though not on the reviewer’s reference speaker) - possibly a basket resonance, and not something the reviewer could hear. A minor bump around 500Hz in the estimated in-room response could add a touch of boxiness for some listeners, though the reviewer didn’t personally notice it. F3 of 55Hz and F10 of 32Hz mean a subwoofer is still needed for home-theater rumble or bass-heavy genres like rap.
What the ATC SCM19 offers: Harmonic distortion at 96dB SPL/1m stays generally low across the range aside from the spike tied to the 700-800Hz resonance. Sealed (unported) cabinet avoids port noise and resonance, and the extremely dense, heavy-duty enclosure (17.8kg/39lb each) reflects ATC’s pro-audio build standards. Watch for: Some stored energy resonance around 500-700hz, 4dB bump around 700hz. Not recommended for the price. CEA2034 spinorama and predicted in-room response both show a very uneven overall balance - a broad accentuation from midrange to treble paired with too little bass - along with directivity error. At 96dB SPL/1m, harmonic distortion tied to the 500-700Hz resonance rises to a level the reviewer says “should not be there.”
Buy the Radiant Acoustics Clarity 6.2 if sound quality matters more than the price. Buy the ATC SCM19 if the price matters more than sound quality.
Skip the ATC SCM19 if sound quality matters to you. It ranks near the bottom of the 130 bookshelf speakers.
Looking for alternatives? See the complete Passive Home rankings.
Specifications Side By Side
| Radiant Acoustics Clarity 6.2 | ATC SCM19 | |
|---|---|---|
| Price | $4500 per pair | $3750 per pair |
| Ranked | #27 of 130 in Large Size Bookshelf Speakers | #119 of 130 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 | 5.13 | 3.79 |
| Spinorama Preference Score with Perfect Sub | 6.90 | 6.21 |
Related Speaker Comparisons
More top alternatives to Radiant Acoustics Clarity 6.2:
- Radiant Acoustics Clarity 6.2 vs Perlisten S4b
- KEF Reference 1 Meta vs Radiant Acoustics Clarity 6.2
- Radiant Acoustics Clarity 6.2 vs GR-Research NX-Studio
- AsciLab C6B vs Radiant Acoustics Clarity 6.2
- Audio First Cadentia 3 vs Radiant Acoustics Clarity 6.2
Prices on this page were last checked September 16, 2026 at 12:41 AM 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.
As an eBay Partner, we may be compensated if you make a purchase.
The Two Speakers In Full
Radiant Acoustics Clarity 6.2: $4500 per pair Radiantacoustics eBay
Pros: 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. Rigid cabinet construction (21mm MDF with a 15mm aluminum front baffle, extensive internal bracing) helps keep resonance in check. A deliberately rising on-axis response paired with narrowing directivity above about 2kHz yields a genuinely linear, non-fatiguing in-room sound rather than the “fake detail” of speakers with a straight treble boost. Excellent pair matching between units (within about 1dB), contributing to precise, well-focused imaging that clearly separated fine details in test tracks. In-room bass extension reaches a solid 40Hz with real kick-drum authority, not just sub-bass rumble. Class-leading dynamic range and compression performance - among the best the reviewer has measured at this price point. Measured bass extension of 55Hz (-3dB), with a measured sensitivity of 84.3dB.
Cons: 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. Low impedance (2.1-ohm minimum, about 1-ohm minimum EPDR) demands an amplifier genuinely comfortable with 4-ohm-and-below loads. Soundstage width narrows above about 5kHz, even though the AMT tweeter itself is capable of wider dispersion. An unexplained resonance appears in harmonic distortion measurements on both units tested (though not on the reviewer’s reference speaker) - possibly a basket resonance, and not something the reviewer could hear. A minor bump around 500Hz in the estimated in-room response could add a touch of boxiness for some listeners, though the reviewer didn’t personally notice it. F3 of 55Hz and F10 of 32Hz mean a subwoofer is still needed for home-theater rumble or bass-heavy genres like rap.
Full Radiant Acoustics Clarity 6.2 review and specifications →
| Bass Extension (-10dB) | 32Hz (measured, Erin's Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 55Hz (measured, Erin's Audio Corner) |
| Dimensions | 14.3"H x 8.7"W x 10.5"D (363.2 x 221 x 266.7 mm) |
| Drivers | 6.5" PURIFI USHINDI woofer, Custom AMT (Air Motion Transformer) tweeter |
| Impedance | 4 ohms nominal (2.1 ohms minimum above 80Hz, measured, Erin's Audio Corner) |
| Sensitivity | 84.3dB (measured, Erin's Audio Corner) |
| Spinorama Preference Score | 5.13 |
| Spinorama Preference Score with Perfect Sub | 6.90 |
| Weight | 23.8 lbs (10.8 kg) each |
| Woofer Cabinet | passive radiator |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Radiant Acoustics Clarity 6.2 vs MoFi SourcePoint 10
- Radiant Acoustics Clarity 6.2 vs Dynaudio Heritage Special
- Radiant Acoustics Clarity 6.2 vs Wharfedale Super Linton
- Radiant Acoustics Clarity 6.2 vs Ascend Acoustics CMT-340 SE2
- Radiant Acoustics Clarity 6.2 vs Wharfedale Linton 85
- Radiant Acoustics Clarity 6.2 vs Arendal 1528 Monitor 8
- Radiant Acoustics Clarity 6.2 vs Ascend Acoustics Sierra-LX
- Radiant Acoustics Clarity 6.2 vs Revel M126Be
- See all 45 comparisons
ATC SCM19: $3750 per pair Tmraudio eBay
Pros: Harmonic distortion at 96dB SPL/1m stays generally low across the range aside from the spike tied to the 700-800Hz resonance. Sealed (unported) cabinet avoids port noise and resonance, and the extremely dense, heavy-duty enclosure (17.8kg/39lb each) reflects ATC’s pro-audio build standards. Measured bass extension of 60Hz (-3dB), with a measured sensitivity of 85dB.
Cons: Some stored energy resonance around 500-700hz, 4dB bump around 700hz. Not recommended for the price. CEA2034 spinorama and predicted in-room response both show a very uneven overall balance - a broad accentuation from midrange to treble paired with too little bass - along with directivity error. At 96dB SPL/1m, harmonic distortion tied to the 500-700Hz resonance rises to a level the reviewer says “should not be there.”
Full ATC SCM19 review and specifications →
| Bass Extension (-10dB) | 34Hz (measured, Audio Science Review) |
|---|---|
| Bass Extension (-3dB) | 60Hz (measured, Audio Science Review) |
| Dimensions | 17.2"H x 10.4"W x 11.8"D (436.9 x 264.2 x 299.7 mm) |
| Drivers | 5.9" Super Linear Magnet cone woofer, 1" soft dome tweeter |
| Impedance | 6 ohms |
| Sensitivity | 85dB (measured, Audio Science Review) |
| Spinorama Preference Score | 3.79 |
| Spinorama Preference Score with Perfect Sub | 6.21 |
| Weight | 39.2 lbs (17.8 kg) each |
| Woofer Cabinet | sealed |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons