Short answer: the KEF R3. It ranks #15 of 141 bookshelf speakers by sound quality (rated 4.5/5) at $2,200 and is still sold new; the KEF Q350 ranks #115 (rated 3.0/5) and is discontinued, so it is only an option used.
The KEF R3 is the more accurate, deeper-bass pick. True three-way stand-mount with a 6.5-inch woofer below KEF’s 5-inch Uni-Q midrange/1-inch tweeter. Its measured preference score, a predictor of how neutral it sounds, is 6.20 against 5.25 for the KEF Q350. Its bass reaches about 58Hz before falling 3dB, against 70Hz for the KEF Q350. Watch for: The low-frequency alignment rolls gradually rather than delivering high-output sub-bass; KEF specifies 58Hz +/-3dB and Erin’s high-level data supports using an 80Hz subwoofer crossover.
What the KEF Q350 does well: CEA2034 spinorama shows a reasonably flat on-axis response with excellent directivity, aided by the coaxial Uni-Q driver. Watch for: Two resonances at 700Hz and 1.2kHz show up on-axis, alongside an upper-bass boost.
Buy the KEF R3. It is rated higher for sound quality and still sold new, while the KEF Q350 is discontinued.
Want more options? Browse the full Passive Home rankings.
Specifications Side By Side
| KEF R3 | KEF Q350 | |
|---|---|---|
| Price | $2,200 per pair | $699.00 per pair Discontinued |
| Ranked | #15 of 141 in Large Size Bookshelf Speakers | #115 of 141 in Large Size Bookshelf Speakers |
| Bass Extension (-3dB) | Approximately 58Hz (manufacturer specified; consistent with Erin’s measured roll-off) | 70Hz (measured, Audio Science Review) |
| Bass Extension (-10dB) | 35.2Hz (measured, Audio Science Review) | 38Hz (measured, Audio Science Review) |
| Sensitivity | Approximately 86-87dB/2.83V/1m (measured, Erin’s Audio Corner) | 86dB (measured, Audio Science Review) |
| Impedance | 8 ohms nominal; suitable for Erin’s 4/8-ohm-rated amplifier | 4 ohms |
| Drivers | 1” tweeter coaxial with 5” midrange; 6.5” woofer | 25mm tweeter + 165mm woofer |
| Dimensions | 16.6”H x 7.9”W x 13.2”D | 14.1”H x 8.3”W x 12”D (358.0 x 210.0 x 306.0 mm) |
| Woofer Cabinet | ported, rear Flexible Port | ported, rear |
| Weight | 29.9 lbs (13.55 kg) each | 29.5 lbs (13.4 kg) |
| Spinorama Preference Score | 6.2 (spinorama.org) | 5.25 (spinorama.org) |
| Spinorama Preference Score with Perfect Sub | 7.97 (spinorama.org) | 7.12 (spinorama.org) |
| DIY Kit | No | No |
Related Speaker Comparisons
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- TAD Compact Reference One (CR1TX) vs KEF R3
- KEF R3 vs Perlisten S4b
- KEF Reference 1 Meta vs KEF R3
- KEF R3 vs GR-Research NX-Studio
- March Audio Sointuva AWG vs KEF R3
Prices on this page were last checked October 4, 2026 at 9:58 PM 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 R3: $2,200 per pair Amazon eBay
Pros: True three-way stand-mount with a 6.5-inch woofer below KEF’s 5-inch Uni-Q midrange/1-inch tweeter. Erin measured approximately 86-87dB/2.83V/1m sensitivity, exceptionally low sub-1% distortion at 86dB and orderly directivity in both planes. The coaxial geometry maintains image stability across seats, while Flexible Port Technology avoids the strong midrange port resonance common to rear-vented competitors. A 110W Parasound drove it successfully in Erin’s listening. Measured bass extension of 35.2Hz (-10dB), with a measured sensitivity of 87dB.
Cons: The low-frequency alignment rolls gradually rather than delivering high-output sub-bass; KEF specifies 58Hz +/-3dB and Erin’s high-level data supports using an 80Hz subwoofer crossover. Narrow high-frequency features and natural Uni-Q narrowing toward the top octave make toe angle audible, although off-axis tracking remains smooth. Sensitivity is moderate, the cabinet weighs almost 30 lb, and this original R3 lacks the Meta successor’s MAT absorber.
Full KEF R3 review and specifications →
| Bass Extension (-10dB) | 35.2Hz (measured, Audio Science Review) |
|---|---|
| Bass Extension (-3dB) | Approximately 58Hz (manufacturer specified; consistent with Erin’s measured roll-off) |
| DIY Kit | No |
| Dimensions | 16.6”H x 7.9”W x 13.2”D |
| Drivers | 1” tweeter coaxial with 5” midrange; 6.5” woofer |
| Impedance | 8 ohms nominal; suitable for Erin’s 4/8-ohm-rated amplifier |
| Sensitivity | Approximately 86-87dB/2.83V/1m (measured, Erin’s Audio Corner) |
| Spinorama Preference Score | 6.2 (spinorama.org) |
| Spinorama Preference Score with Perfect Sub | 7.97 (spinorama.org) |
| Weight | 29.9 lbs (13.55 kg) each |
| Woofer Cabinet | ported, rear Flexible Port |
- Links
- Reviews, Comparisons and Sound Samples
- Erin’s Audio Corner: KEF R3 Review More from Erin’s Audio Corner →
- Erin’s Audio Corner Website: KEF R3
- Audio Science Review Measurements More from Audio Science Review →
- Audio Science Review Measurements (spinorama.org)
- Erin’s Audio Corner: Which is Better for Home Theater: (3) Kef R3 or (3) Kef R2c Center Channel speakers?
- Erin’s Audio Corner: KEF R3 vs R3 Meta vs Reference 1 Meta. Why such a big price gap?
- Head-to-Head Comparisons
KEF Q350: $699.00 per pair Discontinued Amazon eBay
Newer model: the KEF Q3 Meta, ranked higher, rated 3.4/5.
Smaller model: the KEF Q150 (rated 3.7/5).
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. Measured bass extension of 70Hz (-3dB), with a measured sensitivity of 86dB.
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) |
| DIY Kit | No |
| Dimensions | 14.1”H x 8.3”W x 12”D (358.0 x 210.0 x 306.0 mm) |
| Drivers | 25mm tweeter + 165mm woofer |
| Impedance | 4 ohms |
| Sensitivity | 86dB (measured, Audio Science Review) |
| Spinorama Preference Score | 5.25 (spinorama.org) |
| Spinorama Preference Score with Perfect Sub | 7.12 (spinorama.org) |
| Weight | 29.5 lbs (13.4 kg) |
| Woofer Cabinet | ported, rear |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons