Short answer: the Perlisten S4b on measured sound quality, the Radiant Acoustics Clarity 6.2 on price. The Perlisten S4b ranks #2 of 130 bookshelf speakers at $8000. The Radiant Acoustics Clarity 6.2 ranks #27 at $4500, $3500 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 Perlisten S4b offers: Reference-grade directivity and output from a compact sealed monitor. Erin called its radiation behavior the smoothest he had measured: Perlisten’s DPC array (beryllium tweeter between two midrange domes) shapes vertical output while transitioning cleanly to the 7-inch woofer. Harmonic distortion remains below 1% at 86dB and, above 100Hz, also below 1% at 96dB; compression is exceptionally low. The response is highly linear, the midrange was a listening highlight, and the sealed F10 of 40Hz provides a predictable slope for subwoofer integration. Watch for: Erin measured only 84.5dB sensitivity and an impedance minimum just under 4 ohms, a difficult efficiency/load combination that deserves substantial clean amplification. Its 78Hz F3 means a subwoofer is effectively mandatory for full-range listening despite the 40Hz F10. A roughly +3dB feature around 10kHz appears on-axis, though Erin did not find it objectionable. Price is extreme for a stand-mount and the tightly managed vertical radiation makes correct stand height important.
Buy the Radiant Acoustics Clarity 6.2 if the price matters more than sound quality. Buy the Perlisten S4b if sound quality matters more than the price.
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Specifications Side By Side
| Radiant Acoustics Clarity 6.2 | Perlisten S4b | |
|---|---|---|
| Price | $4500 per pair | $8,000 per pair |
| Ranked | #27 of 130 in Large Size Bookshelf Speakers | #2 of 130 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 32Hz (measured, Erin's Audio Corner) | 40Hz (measured, Erin's Audio Corner) |
| Bass Extension (-3dB) | 55Hz (measured, Erin's Audio Corner) | 78Hz (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) | 16.5"H x 9.4"W x 7.3"D |
| Impedance | 4 ohms nominal (2.1 ohms minimum above 80Hz, measured, Erin's Audio Corner) | Just under 4 ohms minimum (measured, Erin's Audio Corner) |
| Sensitivity | 84.3dB (measured, Erin's Audio Corner) | 84.5dB/2.83V/1m (measured, Erin's Audio Corner) |
| Drivers | 6.5" PURIFI USHINDI woofer, Custom AMT (Air Motion Transformer) tweeter | DPC array with 28mm beryllium tweeter and dual 28mm midrange domes; 7" woofer |
| Weight | 23.8 lbs (10.8 kg) each | 24.3 lbs (11 kg) each |
| Woofer Cabinet | passive radiator | sealed |
| Spinorama Preference Score | 5.13 | 4.58 |
| Spinorama Preference Score with Perfect Sub | 6.90 | 7.24 |
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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 |
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Perlisten S4b: $8,000 per pair Perlisten Dealer Locator eBay
Pros: Reference-grade directivity and output from a compact sealed monitor. Erin called its radiation behavior the smoothest he had measured: Perlisten’s DPC array (beryllium tweeter between two midrange domes) shapes vertical output while transitioning cleanly to the 7-inch woofer. Harmonic distortion remains below 1% at 86dB and, above 100Hz, also below 1% at 96dB; compression is exceptionally low. The response is highly linear, the midrange was a listening highlight, and the sealed F10 of 40Hz provides a predictable slope for subwoofer integration. Measured bass extension of 78Hz (-3dB), with a measured sensitivity of 84.5dB.
Cons: Erin measured only 84.5dB sensitivity and an impedance minimum just under 4 ohms, a difficult efficiency/load combination that deserves substantial clean amplification. Its 78Hz F3 means a subwoofer is effectively mandatory for full-range listening despite the 40Hz F10. A roughly +3dB feature around 10kHz appears on-axis, though Erin did not find it objectionable. Price is extreme for a stand-mount and the tightly managed vertical radiation makes correct stand height important.
Full Perlisten S4b review and specifications →
| Bass Extension (-10dB) | 40Hz (measured, Erin's Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 78Hz (measured, Erin's Audio Corner) |
| Dimensions | 16.5"H x 9.4"W x 7.3"D |
| Drivers | DPC array with 28mm beryllium tweeter and dual 28mm midrange domes; 7" woofer |
| Impedance | Just under 4 ohms minimum (measured, Erin's Audio Corner) |
| Sensitivity | 84.5dB/2.83V/1m (measured, Erin's Audio Corner) |
| Spinorama Preference Score | 4.58 |
| Spinorama Preference Score with Perfect Sub | 7.24 |
| Weight | 24.3 lbs (11 kg) each |
| Woofer Cabinet | sealed |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons