Short answer: the KEF Q3 Meta for better sound quality, the Polk Reserve R100 for the lower price. The KEF Q3 Meta ranks #59 of 84 bookshelf speakers at $899.99. The Polk Reserve R100 ranks #65 at $649, $250.99 cheaper.
What the KEF Q3 Meta offers: Coaxial two-way design (1” vented aluminum dome tweeter with Meta absorber embedded in a 6.5” aluminum cone mid/bass driver) delivering unusually wide dispersion both horizontally and vertically (about ±60° each) - wider than… Watch for: Not well suited to high-output use: compression and strain in the 1-2kHz region emerge above about 90dB at 10 feet, so a high-output home theater setup isn’t the best application.
What the Polk Reserve R100 offers: Compact cabinet, unusually useful bass for its size and well-controlled woofer breakup. Watch for: Erin measured only about 85dB sensitivity and the impedance reaches 3.6 ohms, so it is neither efficient nor an entirely benign AVR load.
Buy the KEF Q3 Meta if sound quality matters more than the price. Buy the Polk Reserve R100 if the price matters more than sound quality.
If sound quality matters at all to you, skip the Polk Reserve R100. It ranks near the bottom of the 84 bookshelf speakers, so look higher up the list instead.
Specifications Side By Side
| KEF Q3 Meta | Polk Reserve R100 | |
|---|---|---|
| Price | $899.99 | $649/pair |
| Ranked | #59 of 84 in Large Size Bookshelf Speakers | #65 of 84 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 37Hz (measured, Erin’s Audio Corner) | 49Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 52Hz (measured, Erin’s Audio Corner) | 68Hz (measured, Erin’s Audio Corner) |
| Impedance | 4 ohms nominal, 3.7 ohms minimum (measured above 80Hz, Erin’s Audio Corner) | 3.6 ohms minimum (measured, Erin’s Audio Corner) |
| Sensitivity | 84.5dB (measured average 300Hz-3kHz @ 2.83V/1m, Erin’s Audio Corner; 87dB manufacturer specified) | 85dB/2.83V/1m (measured, Erin’s Audio Corner) |
| Drivers | 165 mm (6.5 in.) aluminium cone woofer, 25 mm (1 in.) vented aluminium dome with MAT tweeter | 1" Pinnacle ring-radiator tweeter; 5.25" Turbine Cone midwoofer |
| Woofer Cabinet | ported, rear | ported, rear X-Port |
| Weight | 15.9 lbs / 7.2 kg | 12.2 lb each |
| Dimensions | 14.1"H x 8.3"W x 12"D (357.0 x 210.0 x 305.0 mm) | 12.8"H x 6.5"W x 10.2"D |
Related Speaker Comparisons
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- GR-Research X-LS Encore vs Polk Monitor XT20
- AsciLab C6B vs Polk Monitor XT20
- Dynaudio Emit 20 vs SVS Prime Bookshelf
- KEF Q3 Meta vs Revel Performa M22
- KEF Q3 Meta vs Revel Concerta2 F35
The Two Speakers In Full
KEF Q3 Meta: $899.99 Amazon Crutchfield
Pros: Coaxial two-way design (1” vented aluminum dome tweeter with Meta absorber embedded in a 6.5” aluminum cone mid/bass driver) delivering unusually wide dispersion both horizontally and vertically (about ±60° each) - wider than typical KEF models, which usually run closer to ±50° horizontal and ±15-20° vertical for non-coaxial designs. A deliberate ~2dB bump around 120Hz gives a satisfying sense of kick-drum impact, a voicing choice the reviewer personally favors even though it’s not strictly accurate. Extended bass-shelf tuning allows placement close to a rear wall (about 1 foot) without sounding boomy. Good directivity overall means it takes well to EQ correction if desired. Cabinet resonances around 350-370Hz and 600Hz look concerning in impedance measurements, but blind ABX testing (24 trials) after adding damping material couldn’t reliably distinguish the treated cabinet from the untreated one - these particular resonances appear to fall below the threshold of audibility. Sturdier build than previous KEF Q-series models.
Cons: Not well suited to high-output use: compression and strain in the 1-2kHz region emerge above about 90dB at 10 feet, so a high-output home theater setup isn’t the best application. A slight loss of attack and clarity around 1-2kHz was noticeable both subjectively and in measurements. F3 of 52Hz with a fairly quick rolloff below 50Hz means a subwoofer is still recommended for real bass extension, even for moderate-volume home theater use. Sealed configuration (using the included port bungs) pushes the bass rolloff up into the 100Hz+ region - the reviewer recommends leaving it in ported mode instead. Sounds best pointed directly at the listener; toeing it out 30° rolls off the top end without a meaningful soundstage benefit. Compression testing shows real breakdown at 102dB/1m, with the woofer losing excursion control - confirms the practical output ceiling. An unexplained -5dB dip appears in on-axis measurements that the reviewer couldn’t attribute to a specific cause.
Full KEF Q3 Meta review and specifications →
| Bass Extension (-10dB) | 37Hz (measured, Erin's Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 52Hz (measured, Erin's Audio Corner) |
| Dimensions | 14.1"H x 8.3"W x 12"D (357.0 x 210.0 x 305.0 mm) |
| Drivers | 165 mm (6.5 in.) aluminium cone woofer, 25 mm (1 in.) vented aluminium dome with MAT tweeter |
| Impedance | 4 ohms nominal, 3.7 ohms minimum (measured above 80Hz, Erin's Audio Corner) |
| Sensitivity | 84.5dB (measured average 300Hz-3kHz @ 2.83V/1m, Erin's Audio Corner; 87dB manufacturer specified) |
| Weight | 15.9 lbs / 7.2 kg |
| Woofer Cabinet | ported, rear |
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Polk Reserve R100: $649/pair Amazon Polk Audio
Pros: Compact cabinet, unusually useful bass for its size and well-controlled woofer breakup. Erin measured F3/F10 points of 68Hz/49Hz, and the X-Port vent avoids much of the chuffing and pipe resonance common to budget rear ports. The 5.25-inch Turbine Cone woofer and 1-inch Pinnacle ring-radiator tweeter produce good detail at moderate levels, while listening roughly 20° off-axis reduces part of the elevated top octave.
Cons: Erin measured only about 85dB sensitivity and the impedance reaches 3.6 ohms, so it is neither efficient nor an entirely benign AVR load. The treble runs roughly 3dB above the midrange and becomes aggressive above about 85dB SPL. A directivity discontinuity through the woofer/tweeter crossover means EQ cannot fully repair the power response, and a 400Hz impedance feature plus 500Hz-1kHz response irregularity suggests a cabinet or system resonance. Substantial low-frequency compression at higher playback levels limits clean dynamics.
Full Polk Reserve R100 review and specifications →
| Bass Extension (-10dB) | 49Hz (measured, Erin's Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 68Hz (measured, Erin's Audio Corner) |
| Dimensions | 12.8"H x 6.5"W x 10.2"D |
| Drivers | 1" Pinnacle ring-radiator tweeter; 5.25" Turbine Cone midwoofer |
| Impedance | 3.6 ohms minimum (measured, Erin's Audio Corner) |
| Sensitivity | 85dB/2.83V/1m (measured, Erin's Audio Corner) |
| Weight | 12.2 lb each |
| Woofer Cabinet | ported, rear X-Port |
As an eBay Partner, we may be compensated if you make a purchase.
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- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons