Short answer: the XTZ Spirit 4. Both are rated 3.4/5 for sound quality (#159 and #158 of 222 bookshelf speakers), and the XTZ Spirit 4 costs $477 against $1,600 for the Sonus Faber Lumina II, and with sound quality even, the cheaper one is the better buy.
What the XTZ Spirit 4 does well: 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 does well: Handmade Italian bookshelf speakers with leather-wrapped cabinets, competitive bass for their size and flexible placement. The catch: Not a neutral speaker: has a persistent high-frequency boost/lift that makes it sound forward and bright, present whether pointed directly at the listener or toed out.
Buy the XTZ Spirit 4. Both are rated the same for sound quality, and it costs $1,123 less than the Sonus Faber Lumina II.
Looking for alternatives? See the complete Passive Home rankings.
Stand-mount speakers with a waveguide tweeter, adjustable treble and port tuning, wide coverage and fairly deep bass.
Handmade Italian bookshelf speakers with leather-wrapped cabinets, competitive bass for their size and flexible placement.
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 | |
|---|---|---|
| Price | $477 per pair | $1,600 per pair |
| Ranked | #159 of 222 in Large Size Bookshelf Speakers | #158 of 222 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | about 40.0Hz (measured, Spinorama data) | 41Hz (measured, Erin’s Audio Corner) |
| Enclosure | 2-way passive, rear-ported | - |
| Drivers | 1” dome tweeter, 6.5” woofer | 29mm DAD dome tweeter, 150mm paper cone mid-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 | 12.5 lbs (5.65 kg) each |
| Sensitivity | 86dB | 86dB (measured average, Erin’s Audio Corner; matches manufacturer spec) |
| Impedance | 4 ohms | 4 ohms nominal, 4.1 ohms minimum (measured, Erin’s Audio Corner) |
| Spinorama Preference Score | 4.18 | 3.81 |
| Spinorama Preference Score with Perfect Sub | 6.30 | 6.10 |
| Bass Extension (-3dB) | 42Hz (manufacturer specified) | 60Hz (measured, Erin’s Audio Corner) |
| DIY Kit | No | No |
| Crossover Frequency | - | 1800Hz |
| Frequency Response | - | 55Hz - 24kHz (manufacturer specified) |
| Recommended Power | - | 30W - 150W |
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