Short answer: the KEF R11 Meta for better sound quality, the Polk Reserve R500 for the lower price. The KEF R11 Meta ranks #19 of 56 floorstanding speakers at $3499.99. The Polk Reserve R500 ranks #28 at $699, $2800.99 cheaper.
What the KEF R11 Meta offers: CEA2034 spinorama shows a generally flat on-axis response with good directivity and very deep bass extension (F10 of 30Hz). Watch for: A dip around 1-1.2kHz on-axis is attributed to a diffraction effect, and shows up as a smaller dip in the predicted in-room response.
The case for the Polk Reserve R500: Dual 5.25” midwoofers paired with a ring radiator tweeter in a floorstanding tower design. The tradeoff: A bump around 4-6kHz gives a “shouty,” mildly sibilant quality in the lower treble.
Buy the KEF R11 Meta if sound quality matters more than the price. Buy the Polk Reserve R500 if the price matters more than sound quality.
Specifications Side By Side
| KEF R11 Meta | Polk Reserve R500 | |
|---|---|---|
| Price | $3,499.99 | $699.00 |
| Ranked | #19 of 56 in Large Size Floorstanding Speakers | #28 of 56 in Large Size Floorstanding Speakers |
| Bass Extension (-10dB) | 31Hz (measured, Audio Science Review) | 33Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 64Hz (measured, Audio Science Review) | 51Hz (measured, Erin’s Audio Corner) |
| Dimensions | 51"H x 12.2"W x 15.1"D (1295.4 x 309.9 x 383.5 mm) | 40.3"H x 6.8"W x 12.4"D (1023.6 x 172.7 x 315 mm) |
| Impedance | 4 ohms | 4.1 ohms minimum above 80Hz (measured, Erin’s Audio Corner; 8 ohms nominal per manufacturer) |
| Drivers | 4 x 165 mm (6.5 in.) hybrid aluminium cone woofers, 125 mm (5 in.) aluminium cone midrange, 25 mm (1 in.) vented aluminium dome with MAT tweeter | Two 5.25" Turbine Cone woofer, 1" Pinnacle Ring Radiator tweeter |
| Sensitivity | 89.5dB | 86.2dB (measured, Erin’s Audio Corner) |
| Weight | 80.5 lbs / 36.5 kg each | 39.2 lbs / 17.8 kg each |
| Woofer Cabinet | ported, rear | ported, rear |
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The Two Speakers In Full
KEF R11 Meta: $3,499.99 Amazon
Pros: CEA2034 spinorama shows a generally flat on-axis response with good directivity and very deep bass extension (F10 of 30Hz). Predicted in-room response is very smooth aside from the small 1-1.5kHz dip. The coaxial Uni-Q driver gives excellent, symmetric vertical directivity, unusual for a tower speaker. Distortion is incredibly low even down to 30Hz at 86dB SPL/1m, and stays low even at 96dB and 102dB SPL/1m - the reviewer found essentially no audible tonality change across that whole output range.
Cons: A dip around 1-1.2kHz on-axis is attributed to a diffraction effect, and shows up as a smaller dip in the predicted in-room response. Horizontal beamwidth of about ±40 degrees is on the narrower side, though the transition from wide to constant directivity is smooth. Minimum impedance dips to 3.2 ohms around 580Hz, calling for an amplifier comfortable with a demanding load. 4-ohm nominal impedance overall.
Full KEF R11 Meta review and specifications →
| Bass Extension (-10dB) | 31Hz (measured, Audio Science Review) |
|---|---|
| Bass Extension (-3dB) | 64Hz (measured, Audio Science Review) |
| Dimensions | 51"H x 12.2"W x 15.1"D (1295.4 x 309.9 x 383.5 mm) |
| Drivers | 4 x 165 mm (6.5 in.) hybrid aluminium cone woofers, 125 mm (5 in.) aluminium cone midrange, 25 mm (1 in.) vented aluminium dome with MAT tweeter |
| Impedance | 4 ohms |
| Sensitivity | 89.5dB |
| Weight | 80.5 lbs / 36.5 kg each |
| Woofer Cabinet | ported, rear |
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Polk Reserve R500: $699.00 Amazon
Pros: Dual 5.25” midwoofers paired with a ring radiator tweeter in a floorstanding tower design. Surprisingly neutral overall compared to Polk’s smaller bookshelf models - notably more even-handed than the brighter-sounding R200 the reviewer tested previously. Good linearity on-axis, within about -3/+2dB. Sensitivity close to 86dB, easily driven to adequate levels in a small-to-medium room with a 100W-capable amplifier. Takes very well to EQ - a single band of correction (about a 2dB cut around 4-5kHz) resolves the main tonal issue and transforms the sound. Dynamic range and compression performance is solidly “medium,” holding up fine through about 20dB of level increase before higher-frequency and bass output start to taper at extreme volumes.
Cons: A bump around 4-6kHz gives a “shouty,” mildly sibilant quality in the lower treble. Counterintuitively, toeing the speaker out to reduce brightness makes this worse rather than better, since the ring-radiator tweeter’s directivity narrows rapidly above about 6-7kHz - pointed on-axis retains enough top-end air to balance the bump, but toed away that air drops off and the shoutiness stands out more. Bass is adequate for its 5.25” woofers but lacks real weight below about 40-50Hz; a subwoofer is still needed for movies and bass-heavy music. A cabinet resonance around 160-170Hz subtracts from rather than adds boom to the mid-bass region. Vertical listening window is fairly narrow - sitting more than about 10-20° above or below the tweeter axis causes a suckout in the 2-5kHz range, reducing clarity and attack. Multitone distortion ramps up noticeably around 1kHz, and crossing over to a subwoofer at 80Hz doesn’t meaningfully reduce it - likely a surround-related effect rather than excursion-related. Without applying corrective EQ, the reviewer says the 4-6kHz brightness would make it harder to live with day to day.
Full Polk Reserve R500 review and specifications →
| Bass Extension (-10dB) | 33Hz (measured, Erin's Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 51Hz (measured, Erin's Audio Corner) |
| Dimensions | 40.3"H x 6.8"W x 12.4"D (1023.6 x 172.7 x 315 mm) |
| Drivers | Two 5.25" Turbine Cone woofer, 1" Pinnacle Ring Radiator tweeter |
| Impedance | 4.1 ohms minimum above 80Hz (measured, Erin's Audio Corner; 8 ohms nominal per manufacturer) |
| Sensitivity | 86.2dB (measured, Erin's Audio Corner) |
| Weight | 39.2 lbs / 17.8 kg each |
| Woofer Cabinet | ported, rear |
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