Short answer: the Radiant Acoustics Clarity 66 on measured sound quality, the Klipsch RP-6000F II on price. The Radiant Acoustics Clarity 66 ranks #5 of 71 floorstanding speakers at $7998. The Klipsch RP-6000F II ranks #54 at $1500, $6498 cheaper.
What the Klipsch RP-6000F II offers: Highest power handling and clean, well-behaved compression at typical volumes. Precise imaging from the controlled horn directivity. Watch for: Worse baffle-step coloration than the smaller RP-5000F II (3-4dB swing vs 2dB), plus a sibilance issue the 5000F doesn’t have - a real regression in tonal balance despite the higher price. Bass extension is mixed - less deep at -3dB (67Hz) than the 5000F - and needs a subwoofer regardless. Narrow horizontal dispersion (~50-60 degrees).
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.
Buy the Klipsch RP-6000F II if the price is the priority over sound quality, or the Radiant Acoustics Clarity 66 if sound quality is the priority over the price.
Skip the Klipsch RP-6000F II if sound quality matters to you. It ranks near the bottom of the 71 floorstanding speakers.
Want more options? Browse the full Passive Home rankings.
Specifications Side By Side
| Klipsch RP-6000F II | Radiant Acoustics Clarity 66 | |
|---|---|---|
| Price | $1500 per pair | $7,998 per pair |
| Ranked | #54 of 71 in Large Size Floorstanding Speakers | #5 of 71 in Large Size Floorstanding Speakers |
| Bass Extension (-10dB) | 33Hz (measured, Erin's Audio Corner) | 24.4Hz (measured, Audio Science Review) |
| Bass Extension (-3dB) | 67Hz (measured, Erin's Audio Corner) | 32.2Hz (measured, Audio Science Review) |
| Sensitivity | 90dB (2.83V/1m, measured by Erin's Audio Corner) | 85.9dB (2.83V/1m, measured, Audio Science Review; 86dB manufacturer specified) |
| Drivers | 1" titanium tweeter with Tractrix horn, dual 6.5" cerametallic woofers | Custom waveguide-loaded tweeter with beam-expansion fins, 2x 6.5" Purifi USHINDI aluminum-cone woofers |
| Weight | 49.4 lbs (22.4 kg) | 101.4 lbs (46 kg) each |
| Impedance | 8 ohms nominal (3.7 ohms minimum, measured, Erin's Audio Corner) | 4 ohms nominal |
| Frequency Response | 38Hz - 25kHz (+-3dB, Manufacturer specified) | - |
| Crossover Frequency | 1770Hz | 2.4kHz |
| Power Handling | 125W continuous, 500W peak | - |
| Dimensions | 39.6" x 9.3" x 17.6" (1006 x 236 x 446 mm) | 40.4"H x 8.7"W x 14"D (1025 x 222 x 355 mm) |
| Woofer Cabinet | ported, rear | ported, large rear port |
| Spinorama Preference Score | 4.83 | 5.10 |
| Spinorama Preference Score with Perfect Sub | 6.56 | 6.12 |
Related Speaker Comparisons
More top alternatives to Radiant Acoustics Clarity 66:
- Radiant Acoustics Clarity 66 vs KEF Blade Two Meta
- Radiant Acoustics Clarity 66 vs MoFi SourcePoint V10 Master Edition
- Radiant Acoustics Clarity 66 vs MoFi SourcePoint 888
- Radiant Acoustics Clarity 66 vs Ascend Acoustics ELX Ribbon Tower
- Radiant Acoustics Clarity 66 vs Revel F328Be
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
Klipsch RP-6000F II: $1500 per pair Amazon eBay
Pros: Highest power handling and clean, well-behaved compression at typical volumes. Precise imaging from the controlled horn directivity. Measured bass extension of 67Hz (-3dB), with a measured sensitivity of 90dB.
Cons: Worse baffle-step coloration than the smaller RP-5000F II (3-4dB swing vs 2dB), plus a sibilance issue the 5000F doesn’t have - a real regression in tonal balance despite the higher price. Bass extension is mixed - less deep at -3dB (67Hz) than the 5000F - and needs a subwoofer regardless. Narrow horizontal dispersion (~50-60 degrees).
Full Klipsch RP-6000F II review and specifications →
| Bass Extension (-10dB) | 33Hz (measured, Erin's Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 67Hz (measured, Erin's Audio Corner) |
| Crossover Frequency | 1770Hz |
| Dimensions | 39.6" x 9.3" x 17.6" (1006 x 236 x 446 mm) |
| Drivers | 1" titanium tweeter with Tractrix horn, dual 6.5" cerametallic woofers |
| Frequency Response | 38Hz - 25kHz (+-3dB, Manufacturer specified) |
| Impedance | 8 ohms nominal (3.7 ohms minimum, measured, Erin's Audio Corner) |
| Power Handling | 125W continuous, 500W peak |
| Sensitivity | 90dB (2.83V/1m, measured by Erin's Audio Corner) |
| Spinorama Preference Score | 4.83 |
| Spinorama Preference Score with Perfect Sub | 6.56 |
| Weight | 49.4 lbs (22.4 kg) |
| Woofer Cabinet | ported, rear |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Klipsch RP-6000F II vs Dynaudio Emit 30
- Klipsch RP-6000F II vs Polk T50
- Klipsch RP-6000F II vs Klipsch RP-8000F II
- Klipsch RP-6000F II vs Focal Aria Evo X N°2
- Klipsch RP-6000F II vs Sony SS-CS3
- Klipsch RP-6000F II vs SVS Ultra Evolution Pinnacle
- Klipsch RP-6000F II vs Klipsch RP-5000F II
- Klipsch RP-6000F II vs Infinity Reference 253
- See all 41 comparisons
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