Short answer: the Klipsch Heresy IV, because the RP-6000F II regresses tonally. The Heresy IV delivers 94.5dB/2.83V/1m sensitivity and strong short-term output from its 12-inch woofer and horns, though its 77Hz F3 requires a subwoofer. The RP-6000F II handles power cleanly but has worse baffle-step coloration than the RP-5000F II (3-4dB swing vs 2dB) plus a sibilance issue, a real regression despite its higher price.
Buy the Klipsch RP-6000F II. It is rated higher for sound quality than the Klipsch Heresy IV and costs less, so only choose the other one for a particular feature it does better.
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Specifications Side By Side
| Klipsch Heresy IV | Klipsch RP-6000F II | |
|---|---|---|
| Price | $3,198 per pair | $1500 per pair |
| Ranked | #72 of 74 in Large Size Floorstanding Speakers | #51 of 74 in Large Size Floorstanding Speakers |
| Bass Extension (-3dB) | 77Hz (measured, Erin’s Audio Corner) | 67Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-10dB) | 50.0Hz (measured, Erin’s Audio Corner) | 33Hz (measured, Erin’s Audio Corner) |
| Sensitivity | 94.5dB/2.83V/1m (measured, Erin’s Audio Corner) | 90dB (2.83V/1m, measured by Erin’s Audio Corner) |
| Impedance | Approximately 4 ohms minimum (measured, Erin’s Audio Corner) | 8 ohms nominal (3.7 ohms minimum, measured, Erin’s Audio Corner) |
| Drivers | 1” horn-loaded tweeter; 1.75” horn-loaded midrange; 12” woofer | 1” titanium tweeter with Tractrix horn, dual 6.5” cerametallic woofers |
| Dimensions | 24.8”H x 15.6”W x 13.3”D | 39.6” x 9.3” x 17.6” (1006 x 236 x 446 mm) |
| Weight | 45 lbs (20.4 kg) each | 49.4 lbs (22.4 kg) |
| Woofer Cabinet | ported, rear | ported, rear |
| Spinorama Preference Score | 2.27 | 5.74 |
| Spinorama Preference Score with Perfect Sub | 5.02 | 7.47 |
| DIY Kit | No | No |
| Frequency Response | - | 38Hz - 25kHz (+-3dB, Manufacturer specified) |
| Crossover Frequency | - | 1770Hz |
| Power Handling | - | 125W continuous, 500W peak |
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Prices on this page were last checked October 2, 2026 at 10:18 PM 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
Klipsch Heresy IV: $3,198 per pair Amazon Crutchfield eBay
Pros: Very high 94.5dB/2.83V/1m sensitivity in Erin’s anechoic measurement (well below Klipsch’s 99dB in-room claim, but still excellent) and strong short-term output from a 12-inch woofer plus horn-loaded midrange and tweeter. The compact, furniture-grade Heritage cabinet is easier to place than most high-efficiency designs, and dynamics at moderate levels can sound lively. A stable four-ohm-capable amplifier can produce substantial SPL with relatively little voltage. Measured bass extension of 77Hz (-3dB), with a measured sensitivity of 94.5dB.
Cons: Erin measured a 77Hz F3 and response rolling away near 100Hz in-room, so a subwoofer is required for modern full-range reproduction. The impedance dips to about 4 ohms, reducing the practical amplifier advantage implied by its sensitivity. Pronounced directivity mismatch at the driver transitions, impedance/response resonances and elevated distortion spikes around the crossover remain audible concerns that EQ cannot fully solve. At 102dB Erin measured roughly 1.5dB midband compression; at 96dB distortion rises around crossover. Performance is difficult to justify at the price, and Erin explicitly did not recommend it.
Full Klipsch Heresy IV review and specifications →
| Bass Extension (-10dB) | 50.0Hz (measured, Erin’s Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 77Hz (measured, Erin’s Audio Corner) |
| DIY Kit | No |
| Dimensions | 24.8”H x 15.6”W x 13.3”D |
| Drivers | 1” horn-loaded tweeter; 1.75” horn-loaded midrange; 12” woofer |
| Impedance | Approximately 4 ohms minimum (measured, Erin’s Audio Corner) |
| Sensitivity | 94.5dB/2.83V/1m (measured, Erin’s Audio Corner) |
| Spinorama Preference Score | 2.27 |
| Spinorama Preference Score with Perfect Sub | 5.02 |
| Weight | 45 lbs (20.4 kg) each |
| Woofer Cabinet | ported, rear |
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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 |
| DIY Kit | No |
| 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 | 5.74 |
| Spinorama Preference Score with Perfect Sub | 7.47 |
| Weight | 49.4 lbs (22.4 kg) |
| Woofer Cabinet | ported, rear |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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