Short answer: the XTZ Spirit 4. It ranks #159 of 222 bookshelf speakers by sound quality, rated 3.4/5, at $477; the Sonus Faber Lumina II Amator ranks #188, rated 3.0/5, and costs $2,000, which makes this an easy call rather than a real tradeoff.
The XTZ Spirit 4 is the better-sounding pick. Stand-mount speakers with a waveguide tweeter, adjustable treble and port tuning, wide coverage and fairly deep bass. The catch: The third-party measurement is low confidence.
What the Sonus Faber Lumina II Amator does well: A luxurious Italian bookshelf speaker with a gorgeous cabinet, solid bass for its size and wide, consistent dispersion. The tradeoff: 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.
Buy the XTZ Spirit 4. It is rated higher for sound quality than the Sonus Faber Lumina II Amator and costs less, so only choose the other one for a particular feature it does better.
Want more options? Browse the full Passive Home rankings.
Stand-mount speakers with a waveguide tweeter, adjustable treble and port tuning, wide coverage and fairly deep bass.
A luxurious Italian bookshelf speaker with a gorgeous cabinet, solid bass for its size and wide, consistent dispersion.
Prices on this page were last checked October 31, 2026 at 7:11 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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Specifications Side By Side
| XTZ Spirit 4 | Sonus Faber Lumina II Amator | |
|---|---|---|
| Price | $477 per pair | $2000 per pair |
| Ranked | #159 of 222 in Large Size Bookshelf Speakers | #188 of 222 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | about 40.0Hz (measured, Spinorama data) | 43Hz (measured, Erin’s Audio Corner) |
| Enclosure | 2-way passive, rear-ported | - |
| Drivers | 1” dome tweeter, 6.5” woofer | 1.14” DAD (Damped Apex Dome) tweeter, 5.9” paper cone woofer |
| Dimensions | 13.8H x 7.5W x 10.6D in | 12” x 7.1” x 10.4” (304 x 180 x 263 mm) |
| Weight | 17.9 lbs (8.1 kg) each | 12.8 lbs (5.8 kg) |
| Sensitivity | 86dB | 86.9dB (2.83V/1m, measured by Erin’s Audio Corner) |
| Impedance | 4 ohms | 4 ohms nominal, 3.9 ohms minimum (measured, Erin’s Audio Corner) |
| Spinorama Preference Score | 4.18 | - |
| Spinorama Preference Score with Perfect Sub | 6.30 | - |
| Bass Extension (-3dB) | 42Hz (manufacturer specified) | 63Hz (measured, Erin’s Audio Corner) |
| DIY Kit | No | No |
| Frequency Response | - | 55Hz - 24kHz (Manufacturer specified) |
| Crossover Frequency | - | 2600Hz |
| Woofer Cabinet | - | Bass reflex, ported |
| Recommended Power | - | 30W - 150W |
| Country | - | Italy (Vicenza) |
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