Short answer: the Polk R200 for better sound quality, the KEF Q350 for the lower price. The Polk R200 ranks #69 of 100 bookshelf speakers at $799. The KEF Q350 ranks #76 at $699, $100 cheaper.
The case for the Polk R200: Two-way design with a 6.5” midwoofer and 1” ring radiator tweeter, giving reasonably tight, well-defined imaging. The tradeoff: A resonance and associated distortion increase around 800Hz-1kHz creates a “tinny,” occasionally glaring quality on certain instruments and vocals.
What the KEF Q350 gets right: CEA2034 spinorama shows a reasonably flat on-axis response with excellent directivity, aided by the coaxial Uni-Q driver. The catch: Two resonances at 700Hz and 1.2kHz show up on-axis, alongside an upper-bass boost.
Buy the Polk R200 if sound quality matters more than the price. Buy the KEF Q350 if the price matters more than sound quality.
If sound quality matters at all to you, skip the KEF Q350. It ranks near the bottom of the 100 bookshelf speakers, so look higher up the list instead.
Specifications Side By Side
| Polk R200 | KEF Q350 | |
|---|---|---|
| Price | $799.00 | $699.00 Discontinued |
| Ranked | #69 of 100 in Large Size Bookshelf Speakers | #76 of 100 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 50Hz (measured, Erin’s Audio Corner) | 38Hz (measured, Audio Science Review) |
| Bass Extension (-3dB) | 74Hz (measured, Erin’s Audio Corner) | 70Hz (measured, Audio Science Review) |
| Impedance | 4 ohms nominal, 3.8 ohms minimum (measured, Erin’s Audio Corner) | 4 ohms |
| Sensitivity | 85dB | 86dB (measured, Audio Science Review) |
| Drivers | 25mm soft dome + 165mm woofer | 25mm tweeter + 165mm woofer |
| Weight | 31.3 lbs / 14.2 kg | 29.5 lbs / 13.4 kg |
| Dimensions | 14.1"H x 7.5"W x 13.9"D (359.0 x 190.0 x 353.8 mm) | 14.1"H x 8.3"W x 12"D (358.0 x 210.0 x 306.0 mm) |
| Woofer Cabinet | ported, rear | ported, rear |
| Discontinued | - | Yes |
Related Speaker Comparisons
More useful head-to-heads from the same speaker class:
- KEF Q3 Meta vs Revel Performa M22
- KEF Q3 Meta vs Polk Reserve R100
- SVS Prime Bookshelf vs Polk Reserve R100
- SVS Prime Bookshelf vs Polk R200
- Polk R200 vs Polk Reserve R100
The Two Speakers In Full
Polk R200: $799.00 Amazon
Pros: Two-way design with a 6.5” midwoofer and 1” ring radiator tweeter, giving reasonably tight, well-defined imaging. Neutral through most of the midrange (roughly 200Hz-1kHz). On-axis response holds within about 1.5dB up to 10kHz. About 20dB of usable dynamic range (76dB to 96dB) before more significant compression sets in. Reasonably close to a 4-ohm nominal load, giving some flexibility with amplifier choice, though a dedicated 4-ohm-capable amp is still recommended.
Cons: A resonance and associated distortion increase around 800Hz-1kHz creates a “tinny,” occasionally glaring quality on certain instruments and vocals, confirmed both by ear and in the frequency-response and distortion measurements. Above about 10kHz, the ring-radiator tweeter takes on an artificial, “digital-esque” quality, then falls off quickly above 16kHz. F3 of 74Hz and F10 of 50Hz mean there’s essentially no meaningful bass “thump” below about 60Hz - a subwoofer is strongly recommended even just to restore basic kick-drum presence. The ring radiator tweeter’s dispersion narrows sharply above about 8kHz, so the speaker should be aimed close to on-axis (no more than 5-10° of toe-out). Vertical listening position is fairly critical - moving more than a few degrees above or below the tweeter line causes a noticeable timbre shift due to a gap in the crossover region. Multitone distortion spikes substantially (to around 10%) in the 600Hz-1kHz region at higher output levels (around 96dB/1m), meaning the glare gets worse the louder it’s played. At the highest tested output (102dB, 26dB of dynamic range), the woofer shows clear signs of struggling; crossing to a subwoofer around 80-100Hz helps prevent bottoming out but doesn’t fully eliminate the compression.
Full Polk R200 review and specifications →
| Bass Extension (-10dB) | 50Hz (measured, Erin's Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 74Hz (measured, Erin's Audio Corner) |
| Dimensions | 14.1"H x 7.5"W x 13.9"D (359.0 x 190.0 x 353.8 mm) |
| Drivers | 25mm soft dome + 165mm woofer |
| Impedance | 4 ohms nominal, 3.8 ohms minimum (measured, Erin's Audio Corner) |
| Sensitivity | 85dB |
| Weight | 31.3 lbs / 14.2 kg |
| 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
KEF Q350: $699.00 Discontinued Amazon
Pros: CEA2034 spinorama shows a reasonably flat on-axis response with excellent directivity, aided by the coaxial Uni-Q driver. Vertical directivity is better than most non-coaxial two-way speakers, another benefit of the concentric design.
Cons: Two resonances at 700Hz and 1.2kHz show up on-axis, alongside an upper-bass boost. Predicted in-room response looks a bit boomy as a result. Distortion climbs substantially in the 100Hz-1kHz range at 96dB SPL/1m, with a distinct resonance-driven peak around 900Hz-1kHz at both test levels. Discontinued.
Full KEF Q350 review and specifications →
| Bass Extension (-10dB) | 38Hz (measured, Audio Science Review) |
|---|---|
| Bass Extension (-3dB) | 70Hz (measured, Audio Science Review) |
| Dimensions | 14.1"H x 8.3"W x 12"D (358.0 x 210.0 x 306.0 mm) |
| Discontinued | Yes |
| Drivers | 25mm tweeter + 165mm woofer |
| Impedance | 4 ohms |
| Sensitivity | 86dB (measured, Audio Science Review) |
| Weight | 29.5 lbs / 13.4 kg |
| 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