Short answer: the KEF Q350 for tonal balance, the Sonus Faber Lumina II Amator for bass extension from a bookshelf. The Amator reaches solid bass extension for a bookshelf, F3 63Hz and F10 43Hz with about 50Hz in-room, but its treble runs 3-6dB above the midrange depending on angle, a brightness other owners corroborate. The KEF’s Uni-Q is reasonably flat with excellent directivity, though resonances at 700Hz and 1.2kHz remain.
Buy the Sonus Faber Lumina II Amator new; the KEF Q350 is no longer sold new, so it only makes sense as a used find.
Still deciding? The full Passive Home rankings cover every ranked option.
Specifications Side By Side
| KEF Q350 | Sonus Faber Lumina II Amator | |
|---|---|---|
| Price | $699.00 per pair Discontinued | $2000 per pair |
| Ranked | #109 of 134 in Large Size Bookshelf Speakers | #110 of 134 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 38Hz (measured, Audio Science Review) | 43Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 70Hz (measured, Audio Science Review) | 63Hz (measured, Erin’s Audio Corner) |
| Impedance | 4 ohms | 4 ohms nominal, 3.9 ohms minimum (measured, Erin’s Audio Corner) |
| Sensitivity | 86dB (measured, Audio Science Review) | 86.9dB (2.83V/1m, measured by Erin’s Audio Corner) |
| Drivers | 25mm tweeter + 165mm woofer | 1.14” DAD (Damped Apex Dome) tweeter, 5.9” paper cone woofer |
| Weight | 29.5 lbs (13.4 kg) | 12.8 lbs (5.8 kg) |
| Dimensions | 14.1”H x 8.3”W x 12”D (358.0 x 210.0 x 306.0 mm) | 12” x 7.1” x 10.4” (304 x 180 x 263 mm) |
| Woofer Cabinet | ported, rear | Bass reflex, ported |
| Spinorama Preference Score | 5.25 (spinorama.org) | - |
| Spinorama Preference Score with Perfect Sub | 7.12 (spinorama.org) | - |
| DIY Kit | No | No |
| Frequency Response | - | 55Hz - 24kHz (Manufacturer specified) |
| Crossover Frequency | - | 2600Hz |
| Recommended Power | - | 30W - 150W |
| Country | - | Italy (Vicenza) |
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Prices on this page were last checked October 2, 2026 at 10:18 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 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
Sonus Faber Lumina II Amator: $2000 per pair Crutchfield eBay
Pros: Solid bass extension for a bookshelf (F3 63Hz, F10 43Hz), reaching about 50Hz in-room. Decent sensitivity and wide, consistent horizontal dispersion (~60-70 degrees): better directivity than expected for a two-way design. Gorgeous, luxury-grade cabinet design. Measured bass extension of 63Hz (-3dB), with a measured sensitivity of 86.9dB.
Cons: Very bright treble, running 3-6dB above the midrange depending on measurement angle: independently corroborated by other owners online, not just one reviewer’s opinion. Causes audible sibilance and a forward, grainy character. Notably the brightest of three Sonus Faber models Erin’s Audio Corner has tested, even brighter than the brand’s own Sonetto II G2. A mechanical resonance/ringing artifact shows up around 1kHz in measurements. Needs a subwoofer for anything below about 50Hz.
Full Sonus Faber Lumina II Amator review and specifications →
| Bass Extension (-10dB) | 43Hz (measured, Erin’s Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 63Hz (measured, Erin’s Audio Corner) |
| Country | Italy (Vicenza) |
| Crossover Frequency | 2600Hz |
| DIY Kit | No |
| Dimensions | 12” x 7.1” x 10.4” (304 x 180 x 263 mm) |
| Drivers | 1.14” DAD (Damped Apex Dome) tweeter, 5.9” paper cone woofer |
| Frequency Response | 55Hz - 24kHz (Manufacturer specified) |
| Impedance | 4 ohms nominal, 3.9 ohms minimum (measured, Erin’s Audio Corner) |
| Recommended Power | 30W - 150W |
| Sensitivity | 86.9dB (2.83V/1m, measured by Erin’s Audio Corner) |
| Weight | 12.8 lbs (5.8 kg) |
| Woofer Cabinet | Bass reflex, ported |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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