Short answer: the Radiant Acoustics Clarity 66 for better sound quality, the Klipsch RP-5000F II for the lower price. The Radiant Acoustics Clarity 66 ranks #5 of 71 floorstanding speakers at $7998. The Klipsch RP-5000F II ranks #48 at $1199.98, $6798.02 cheaper.
What the Radiant Acoustics Clarity 66 offers: ASR’s revised Spinorama measurement shows bass reaching 32.2Hz at -3dB and 27.8Hz at -6dB, giving substantial low-end weight without a subwoofer. The response spans 2.3dB from 300Hz to 5kHz, with preference scores of 5.10 standalone and 6.12 with an ideal subwoofer. The review’s exceptionally low bass distortion at ordinary levels complements that extension, while dual 6.5-inch Purifi woofers provide a strong foundation for full-range listening. Watch for: Vertical directivity is narrow and horizontal coverage is uneven, so listening height and placement affect tonal balance. Treble resonances and response irregularities keep it from reference-level neutrality. Spinorama’s modeled EQ improves the scores to 6.09 standalone and 6.99 with an ideal subwoofer, but those are corrected results, not stock performance. Measured sensitivity is 85.9dB at 2.83V/1m with a nominal 4-ohm load; use an amplifier comfortable driving 4 ohms. Distortion rises at very high playback levels.
What the Klipsch RP-5000F II offers: The most tonally coherent of the RP II floorstander line, with a mild baffle-step dip and treble tilt but no additional coloration issues beyond that. Precise imaging thanks to the controlled horn/waveguide directivity. Watch for: Bass extension is underwhelming for a floorstander - F3 at 55Hz, F10 at 41Hz - and needs a subwoofer. Narrow horizontal dispersion (~50-60 degrees) trades soundstage width for imaging precision. A mild high-frequency tilt and a slight lack of detail around 1-1.5kHz.
Buy the Radiant Acoustics Clarity 66 if sound quality is the priority over the price, or the Klipsch RP-5000F II if the price is the priority over sound quality.
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Specifications Side By Side
| Radiant Acoustics Clarity 66 | Klipsch RP-5000F II | |
|---|---|---|
| Price | $7,998 per pair | $1199.98 per pair |
| Ranked | #5 of 71 in Large Size Floorstanding Speakers | #48 of 71 in Large Size Floorstanding Speakers |
| Bass Extension (-3dB) | 32.2Hz (measured, Audio Science Review) | 55Hz (measured, Erin's Audio Corner) |
| Bass Extension (-10dB) | 24.4Hz (measured, Audio Science Review) | 41Hz (measured, Erin's Audio Corner) |
| Sensitivity | 85.9dB (2.83V/1m, measured, Audio Science Review; 86dB manufacturer specified) | 90dB (2.83V/1m, measured by Erin's Audio Corner) |
| Drivers | Custom waveguide-loaded tweeter with beam-expansion fins, 2x 6.5" Purifi USHINDI aluminum-cone woofers | 1" titanium tweeter with Tractrix horn, dual 5.25" cerametallic woofers |
| Dimensions | 40.4"H x 8.7"W x 14"D (1025 x 222 x 355 mm) | 36.1" x 8.1" x 14.8" (917 x 207 x 375 mm) |
| Weight | 101.4 lbs (46 kg) each | 38.6 lbs (17.5 kg) |
| Impedance | 4 ohms nominal | 8 ohms nominal, 3.3 ohms minimum (measured above 80Hz, Erin's Audio Corner) |
| Crossover Frequency | 2.4kHz | 1900Hz |
| Woofer Cabinet | ported, large rear port | ported, rear |
| Spinorama Preference Score | 5.10 | 4.35 |
| Spinorama Preference Score with Perfect Sub | 6.12 | 6.36 |
| Frequency Response | - | 40Hz - 25kHz (+-3dB, Manufacturer specified) |
| Power Handling | - | 100W continuous, 400W peak |
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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.
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The Two Speakers In Full
Radiant Acoustics Clarity 66: $7,998 per pair Radiant Acoustics eBay
Pros: ASR’s revised Spinorama measurement shows bass reaching 32.2Hz at -3dB and 27.8Hz at -6dB, giving substantial low-end weight without a subwoofer. The response spans 2.3dB from 300Hz to 5kHz, with preference scores of 5.10 standalone and 6.12 with an ideal subwoofer. The review’s exceptionally low bass distortion at ordinary levels complements that extension, while dual 6.5-inch Purifi woofers provide a strong foundation for full-range listening. Measured bass extension of 32.2Hz (-3dB), with a measured sensitivity of 85.9dB.
Cons: Vertical directivity is narrow and horizontal coverage is uneven, so listening height and placement affect tonal balance. Treble resonances and response irregularities keep it from reference-level neutrality. Spinorama’s modeled EQ improves the scores to 6.09 standalone and 6.99 with an ideal subwoofer, but those are corrected results, not stock performance. Measured sensitivity is 85.9dB at 2.83V/1m with a nominal 4-ohm load; use an amplifier comfortable driving 4 ohms. Distortion rises at very high playback levels.
Full Radiant Acoustics Clarity 66 review and specifications →
| Bass Extension (-10dB) | 24.4Hz (measured, Audio Science Review) |
|---|---|
| Bass Extension (-3dB) | 32.2Hz (measured, Audio Science Review) |
| Crossover Frequency | 2.4kHz |
| Dimensions | 40.4"H x 8.7"W x 14"D (1025 x 222 x 355 mm) |
| Drivers | Custom waveguide-loaded tweeter with beam-expansion fins, 2x 6.5" Purifi USHINDI aluminum-cone woofers |
| Impedance | 4 ohms nominal |
| Sensitivity | 85.9dB (2.83V/1m, measured, Audio Science Review; 86dB manufacturer specified) |
| Spinorama Preference Score | 5.10 |
| Spinorama Preference Score with Perfect Sub | 6.12 |
| Weight | 101.4 lbs (46 kg) each |
| Woofer Cabinet | ported, large rear port |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Radiant Acoustics Clarity 66 vs Ascend Acoustics ELX Ribbon Tower
- Radiant Acoustics Clarity 66 vs MoFi SourcePoint 888
- Radiant Acoustics Clarity 66 vs MoFi SourcePoint V10 Master Edition
- Radiant Acoustics Clarity 66 vs KEF Blade Two Meta
- Radiant Acoustics Clarity 66 vs Revel F328Be
- Radiant Acoustics Clarity 66 vs Revel F226Be
- Radiant Acoustics Clarity 66 vs JBL 4367
- Radiant Acoustics Clarity 66 vs Revel F228Be
- See all 23 comparisons
Klipsch RP-5000F II: $1199.98 per pair Amazon eBay
Pros: The most tonally coherent of the RP II floorstander line, with a mild baffle-step dip and treble tilt but no additional coloration issues beyond that. Precise imaging thanks to the controlled horn/waveguide directivity. Measured bass extension of 55Hz (-3dB), with a measured sensitivity of 90dB.
Cons: Bass extension is underwhelming for a floorstander - F3 at 55Hz, F10 at 41Hz - and needs a subwoofer. Narrow horizontal dispersion (~50-60 degrees) trades soundstage width for imaging precision. A mild high-frequency tilt and a slight lack of detail around 1-1.5kHz.
Full Klipsch RP-5000F II review and specifications →
| Bass Extension (-10dB) | 41Hz (measured, Erin's Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 55Hz (measured, Erin's Audio Corner) |
| Crossover Frequency | 1900Hz |
| Dimensions | 36.1" x 8.1" x 14.8" (917 x 207 x 375 mm) |
| Drivers | 1" titanium tweeter with Tractrix horn, dual 5.25" cerametallic woofers |
| Frequency Response | 40Hz - 25kHz (+-3dB, Manufacturer specified) |
| Impedance | 8 ohms nominal, 3.3 ohms minimum (measured above 80Hz, Erin's Audio Corner) |
| Power Handling | 100W continuous, 400W peak |
| Sensitivity | 90dB (2.83V/1m, measured by Erin's Audio Corner) |
| Spinorama Preference Score | 4.35 |
| Spinorama Preference Score with Perfect Sub | 6.36 |
| Weight | 38.6 lbs (17.5 kg) |
| Woofer Cabinet | ported, rear |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Klipsch RP-5000F II vs SVS Ultra Evolution Pinnacle
- Klipsch RP-5000F II vs KEF Q11 Meta
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