Short answer: the Polk Audio XT60. It ranks #36 of 59 floorstanding speakers by sound quality at $229; the Klipsch Heresy IV ranks #37 and costs $3198, so there is not much of a tradeoff to weigh.
What the Polk Audio XT60 offers: Passive-radiator-loaded design (6.5” woofer plus two 6.5” passive radiators) gives deeper bass than the driver size alone would suggest - 43.9Hz at -3dB / 38.1Hz at -10dB, genuinely competitive extension for a budget tower. The tradeoff: Bass alignment Q is the highest, least-controlled figure in this entire batch, consistent with owner reports of a slightly loose, boomy low end at higher volumes.
On the Klipsch Heresy IV side: 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. Watch for: 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 Polk Audio XT60. It ranks higher for sound quality than the Klipsch Heresy IV and costs less, so there is no real case for the other one.
Specifications Side By Side
| Polk Audio XT60 | Klipsch Heresy IV | |
|---|---|---|
| Price | $229 | $3,198/pair |
| Ranked | #36 of 59 in Large Size Floorstanding Speakers | #37 of 59 in Large Size Floorstanding Speakers |
| Bass Extension (-10dB) | 38.1Hz (measured, spinorama.org) | 50.0Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 43.9Hz (measured, spinorama.org) | 77Hz (measured, Erin’s Audio Corner) |
| Impedance | 4/8-ohm compatible | Approximately 4 ohms minimum (measured, Erin’s Audio Corner) |
| Sensitivity | 86dB (1W/1m) | 94.5dB/2.83V/1m (measured, Erin’s Audio Corner) |
| Drivers | 1" Terylene dome tweeter, 6.5" bilaminate polypropylene woofer, 2x 6.5" passive radiators | 1" horn-loaded tweeter; 1.75" horn-loaded midrange; 12" woofer |
| Weight | 20 lbs / 9.07 kg (20 lb) each | 45 lb each |
| Woofer Cabinet | Passive radiator-loaded | ported, rear |
| Dimensions | 19.05 x 92.5 x 23.09cm (7.5 x 36.4 x 9.09 in) each | 24.8"H x 15.6"W x 13.3"D |
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The Two Speakers In Full
Polk Audio XT60: $229 Amazon Bhphotovideo Crutchfield
Pros: Passive-radiator-loaded design (6.5” woofer plus two 6.5” passive radiators) gives deeper bass than the driver size alone would suggest - 43.9Hz at -3dB / 38.1Hz at -10dB, genuinely competitive extension for a budget tower. Hi-Res Audio certified, Dolby Atmos/DTS:X compatible, and works with either 4- or 8-ohm amplifier outputs.
Cons: Bass alignment Q (lfq 0.96) is the highest, least-controlled figure in this entire batch, consistent with owner reports of a slightly loose, boomy low end at higher volumes. On-axis deviation (nbd_on_axis 0.512) is also the roughest measured figure in the batch. The vinyl-wrapped (not wood veneer) cabinet reads as budget up close per owner reviews, and at least one owner reported blowing a driver under sustained heavy bass - some caution is warranted with bass-heavy source material at volume.
Full Polk Audio XT60 review and specifications →
| Bass Extension (-10dB) | 38.1Hz (measured, spinorama.org) |
|---|---|
| Bass Extension (-3dB) | 43.9Hz (measured, spinorama.org) |
| Dimensions | 19.05 x 92.5 x 23.09cm (7.5 x 36.4 x 9.09 in) each |
| Drivers | 1" Terylene dome tweeter, 6.5" bilaminate polypropylene woofer, 2x 6.5" passive radiators |
| Impedance | 4/8-ohm compatible |
| Sensitivity | 86dB (1W/1m) |
| Weight | 20 lbs / 9.07 kg (20 lb) each |
| Woofer Cabinet | Passive radiator-loaded |
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- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Polk Audio XT60 vs Klipsch Forte IV
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- Polk Audio XT60 vs ELAC DF63
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Klipsch Heresy IV: $3,198/pair Amazon Crutchfield
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.
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) |
| 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) |
| Weight | 45 lb each |
| Woofer Cabinet | ported, rear |
As an eBay Partner, we may be compensated if you make a purchase.
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Klipsch Heresy IV vs Klipsch Forte IV
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- Klipsch Heresy IV vs Definitive Technology BP-9020
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