Short answer: the Q3 Meta, KEF’s coaxial-driver design has clearly improved. The Q3 Meta ranks #92 and the Q350 ranks #109 out of 134 large bookshelf speakers, for $200.99 more.
Both speakers share KEF’s signature coaxial Uni-Q layout, tweeter mounted at the center of the woofer, but the Q3 Meta’s execution measures noticeably cleaner. The Q350’s on-axis response shows two resonances, at 700Hz and 1.2kHz, plus an upper-bass boost that makes its predicted in-room response look a bit boomy, and its distortion climbs substantially in the 100Hz-1kHz range at higher SPL with a resonance-driven peak around 900Hz-1kHz. The Q3 Meta’s MAT-damped tweeter and Meta-absorber-equipped woofer avoid those particular resonance peaks, and its dispersion is unusually wide for a KEF design, about ±60° both horizontally and vertically, which is wider than the non-coaxial norm of roughly ±50° horizontal and ±15-20° vertical.
Bass extension favors the Q3 Meta on paper but with caveats. It reaches -3dB around 52Hz versus the Q350’s 70Hz, though the Q3 Meta’s own review notes a fairly quick rolloff below 50Hz and still recommends a subwoofer for real extension. Both speakers share the same 6.5-inch woofer and 1-inch tweeter format and nearly identical cabinet dimensions, but the Q3 Meta is markedly lighter at 15.9 lbs (7.2 kg) versus the Q350’s 29.5 lbs (13.4 kg).
Neither speaker is built for high-output home theater duty. The Q3 Meta shows compression and strain in the 1-2kHz region above about 90dB at 10 feet, with real breakdown and woofer excursion loss around 102dB/1m, so both are better suited to normal listening levels than to reference-level playback.
Buy the Q3 Meta for the cleaner crossover-region measurements, wider dispersion, and the fact that it is still in current production.
Buy the Q350 only if you find a deep discount on remaining stock and don’t mind the documented resonances and boomier in-room response.
Still deciding? The full Passive Home rankings cover every ranked option.
Specifications Side By Side
| KEF Q3 Meta | KEF Q350 | |
|---|---|---|
| Price | $899.99 per pair | $699.00 per pair Discontinued |
| Ranked | #92 of 134 in Large Size Bookshelf Speakers | #109 of 134 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 37Hz (measured, Erin’s Audio Corner) | 38Hz (measured, Audio Science Review) |
| Bass Extension (-3dB) | 52Hz (measured, Erin’s Audio Corner) | 70Hz (measured, Audio Science Review) |
| Impedance | 4 ohms nominal, 3.7 ohms minimum (measured above 80Hz, Erin’s Audio Corner) | 4 ohms |
| Sensitivity | 84.5dB (measured average 300Hz-3kHz @ 2.83V/1m, Erin’s Audio Corner; 87dB manufacturer specified) | 86dB (measured, Audio Science Review) |
| Drivers | 165 mm (6.5 in.) aluminium cone woofer, 25 mm (1 in.) vented aluminium dome with MAT tweeter | 25mm tweeter + 165mm woofer |
| Woofer Cabinet | ported, rear | ported, rear |
| Weight | 15.9 lbs (7.2 kg) | 29.5 lbs (13.4 kg) |
| Dimensions | 14.1”H x 8.3”W x 12”D (357.0 x 210.0 x 305.0 mm) | 14.1”H x 8.3”W x 12”D (358.0 x 210.0 x 306.0 mm) |
| Spinorama Preference Score | 4.66 | 5.25 (spinorama.org) |
| Spinorama Preference Score with Perfect Sub | 6.50 | 7.12 (spinorama.org) |
| DIY Kit | No | No |
Related Speaker Comparisons
More top alternatives to KEF Q3 Meta:
- KEF Q3 Meta vs Perlisten S4b
- KEF Q3 Meta vs KEF Reference 1 Meta
- KEF Q3 Meta vs GR-Research NX-Studio
- KEF Q3 Meta vs AsciLab C6B
- KEF Q3 Meta vs Audio First Cadentia 3
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The Two Speakers In Full
KEF Q3 Meta: $899.99 per pair Amazon Crutchfield eBay
Older model: the KEF Q350 (ranked lower, rated 3/5).
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. Measured bass extension of 52Hz (-3dB), with a measured sensitivity of 84.5dB.
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) |
| DIY Kit | No |
| 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) |
| Spinorama Preference Score | 4.66 |
| Spinorama Preference Score with Perfect Sub | 6.50 |
| Weight | 15.9 lbs (7.2 kg) |
| Woofer Cabinet | ported, rear |
- Links
- Reviews, Comparisons and Sound Samples
- 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.
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