Short answer: the KEF R5 for better sound quality, the Polk Audio XT60 for the lower price. The KEF R5 ranks #10 of 71 floorstanding speakers at $2999. The Polk Audio XT60 ranks #43 at $229, $2770 cheaper.
What the KEF R5 offers: Slim three-way tower with the acoustic advantages of KEF’s coincident Uni-Q midrange/tweeter: horizontal and vertical off-axis responses track the direct sound smoothly, producing stable imaging and a well-behaved directivity index. Erin measured deep low-frequency reach for the cabinet width—77Hz F3 but 33Hz F10—and less than 1% harmonic distortion at 86dB. At 96dB it remains clean when high-passed, and its mild response deviations are suitable for equalization because the radiation pattern stays orderly. Watch for: The unusual gap between 77Hz F3 and 33Hz F10 indicates a gradual bass contour rather than flat deep-bass output; a subwoofer and roughly 80Hz high-pass are recommended for high-level playback. Erin measured a minimum near 3.5 ohms around 150Hz, although most of the curve remains above 4 ohms, so amplifier quality still matters. Sensitivity is approximately 86dB/2.83V/1m. At 102dB, compression reaches roughly 1dB around 150Hz, showing the limits of the twin 5.25-inch woofers. This original model lacks the Meta version’s MAT rear-wave absorption.
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. Hi-Res Audio certified, Dolby Atmos/DTS:X compatible, and works with either 4- or 8-ohm amplifier outputs. Watch for: 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.
Buy the KEF R5 if sound quality matters more than the price. Buy the Polk Audio XT60 if the price matters more than sound quality.
Specifications Side By Side
| KEF R5 | Polk Audio XT60 | |
|---|---|---|
| Price | $2,999/pair Discontinued | $229.00 |
| Ranked | #10 of 71 in Large Size Floorstanding Speakers | #43 of 71 in Large Size Floorstanding Speakers |
| Bass Extension (-3dB) | 77Hz (measured, Erin’s Audio Corner) | 43.9Hz (measured, spinorama.org) |
| Bass Extension (-10dB) | 33Hz (measured, Erin’s Audio Corner) | 38.1Hz (measured, spinorama.org) |
| Sensitivity | Approximately 86dB/2.83V/1m (measured, Erin’s Audio Corner) | 86dB (1W/1m) |
| Impedance | Approximately 3.5 ohms minimum near 150Hz (measured, Erin’s Audio Corner) | 4/8-ohm compatible |
| Drivers | 1" aluminum tweeter coaxial with 5" midrange; dual 5.25" woofers | 1" Terylene dome tweeter, 6.5" bilaminate polypropylene woofer, 2x 6.5" passive radiators |
| Dimensions | 40.4"H x 6.9"W x 13.5"D | 19.05 x 92.5 x 23.09cm (7.5 x 36.4 x 9.09 in) each |
| Discontinued | Yes | - |
| Weight | 59.5 lb each | 20 lbs / 9.07 kg (20 lb) each |
| Woofer Cabinet | ported, rear | Passive radiator-loaded |
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Prices on this page were last checked August 25, 2026 at 6:19 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
KEF R5: $2,999/pair Discontinued eBay
Pros: Slim three-way tower with the acoustic advantages of KEF’s coincident Uni-Q midrange/tweeter: horizontal and vertical off-axis responses track the direct sound smoothly, producing stable imaging and a well-behaved directivity index. Erin measured deep low-frequency reach for the cabinet width—77Hz F3 but 33Hz F10—and less than 1% harmonic distortion at 86dB. At 96dB it remains clean when high-passed, and its mild response deviations are suitable for equalization because the radiation pattern stays orderly.
Cons: The unusual gap between 77Hz F3 and 33Hz F10 indicates a gradual bass contour rather than flat deep-bass output; a subwoofer and roughly 80Hz high-pass are recommended for high-level playback. Erin measured a minimum near 3.5 ohms around 150Hz, although most of the curve remains above 4 ohms, so amplifier quality still matters. Sensitivity is approximately 86dB/2.83V/1m. At 102dB, compression reaches roughly 1dB around 150Hz, showing the limits of the twin 5.25-inch woofers. This original model lacks the Meta version’s MAT rear-wave absorption. Discontinued.
Full KEF R5 review and specifications →
| Bass Extension (-10dB) | 33Hz (measured, Erin's Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 77Hz (measured, Erin's Audio Corner) |
| Dimensions | 40.4"H x 6.9"W x 13.5"D |
| Discontinued | Yes |
| Drivers | 1" aluminum tweeter coaxial with 5" midrange; dual 5.25" woofers |
| Impedance | Approximately 3.5 ohms minimum near 150Hz (measured, Erin's Audio Corner) |
| Sensitivity | Approximately 86dB/2.83V/1m (measured, Erin's Audio Corner) |
| Weight | 59.5 lb each |
| Woofer Cabinet | ported, rear |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Polk Audio XT60: $229.00 Amazon Bhphotovideo Crutchfield eBay
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 |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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