Short answer: the Radiant Acoustics Clarity 66. It ranks #11 of 228 floorstanding speakers by sound quality, rated 4.6/5, at $7,998. The Klipsch Heresy IV ranks #222, rated 2.3/5, at $3,599.98, $4,398.02 cheaper, not enough of a saving to outweigh the sound-quality gap.
The Radiant Acoustics Clarity 66 is the more accurate, deeper-bass choice. Highly accurate floorstanding speakers with Purifi woofers and bass deep enough to skip a subwoofer. Its measured preference score, a predictor of how neutral it sounds, is 6.01 against 2.27 for the Klipsch Heresy IV. Its bass reaches about 32.2Hz before falling 3dB, against 77Hz for the Klipsch Heresy IV. The tradeoff: Vertical directivity is narrow and horizontal coverage is uneven, so listening height and placement affect tonal balance.
The case for the Klipsch Heresy IV: A compact horn loaded speaker with a 12 inch woofer and very high sensitivity, giving lively dynamics from modest amplifiers. The tradeoff: Erin measured a 77Hz F3 and response rolling away near 100Hz in-room, so a subwoofer is required for modern full-range reproduction.
Buy the Radiant Acoustics Clarity 66. It is rated higher for sound quality, and the $4,398.02 saving on the Klipsch Heresy IV is not enough to make up the difference.
Want more options? Browse the full Passive Home rankings.
Highly accurate floorstanding speakers with Purifi woofers and bass deep enough to skip a subwoofer.
A compact horn loaded speaker with a 12 inch woofer and very high sensitivity, giving lively dynamics from modest amplifiers.
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Specifications Side By Side
| Radiant Acoustics Clarity 66 | Klipsch Heresy IV | |
|---|---|---|
| Price | $7,998 per pair | $3,599.98 per pair |
| Ranked | #11 of 228 in Large Size Floorstanding Speakers | #222 of 228 in Large Size Floorstanding Speakers |
| Bass Extension (-3dB) | 32.2Hz (measured, Audio Science Review) | 77Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-10dB) | 24.4Hz (measured, Audio Science Review) | 50.0Hz (measured, Erin’s Audio Corner) |
| Sensitivity | 85.9dB (2.83V/1m, measured, Audio Science Review; 86dB manufacturer specified) | 94.5dB/2.83V/1m (measured, Erin’s Audio Corner) |
| Drivers | Custom waveguide-loaded tweeter with beam-expansion fins, 2x 6.5” Purifi USHINDI aluminum-cone woofers | 1” horn-loaded tweeter; 1.75” horn-loaded midrange; 12” woofer |
| Dimensions | 40.4”H x 8.7”W x 14”D (1025 x 222 x 355 mm) | 24.8”H x 15.6”W x 13.3”D |
| Weight | 101.4 lbs (46 kg) each | 45 lbs (20.4 kg) each |
| Impedance | 4 ohms nominal | Approximately 4 ohms minimum (measured, Erin’s Audio Corner) |
| Crossover Frequency | 2.4kHz | - |
| Woofer Cabinet | ported, large rear port | ported, rear |
| Spinorama Preference Score | 6.01 | 2.27 |
| Spinorama Preference Score with Perfect Sub | 7.03 | 5.02 |
| DIY Kit | No | No |
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