Short answer: the Perlisten S4b if sound quality matters most, the XTZ Spirit 4 if price matters most. The Perlisten S4b ranks #2 of 222 bookshelf speakers, rated 4.8/5, at $8,000. The XTZ Spirit 4 ranks #159, rated 3.4/5, at $477, $7,523 cheaper.
The case for the XTZ Spirit 4: Stand-mount speakers with a waveguide tweeter, adjustable treble and port tuning, wide coverage and fairly deep bass. Watch for: The third-party measurement is low confidence.
The Perlisten S4b is the more accurate option. A compact sealed bookshelf speaker with reference grade accuracy, exceptionally smooth dispersion, and very low distortion at high volume. Its measured preference score, a predictor of how neutral it sounds, is 5.35 against 4.18 for the XTZ Spirit 4. The tradeoff: Erin measured only 84.5dB sensitivity and an impedance minimum just under 4 ohms, a difficult efficiency/load combination that deserves substantial clean amplification.
Buy the XTZ Spirit 4 if the price matters more than sound quality. Buy the Perlisten S4b if sound quality matters more than the price.
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 compact sealed bookshelf speaker with reference grade accuracy, exceptionally smooth dispersion, and very low distortion at high volume.
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 | Perlisten S4b | |
|---|---|---|
| Price | $477 per pair | $8,000 per pair |
| Ranked | #159 of 222 in Large Size Bookshelf Speakers | #2 of 222 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | about 40.0Hz (measured, Spinorama data) | 40Hz (measured, Erin’s Audio Corner) |
| Enclosure | 2-way passive, rear-ported | - |
| Drivers | 1” dome tweeter, 6.5” woofer | DPC array with 28mm beryllium tweeter and dual 28mm midrange domes; 7” woofer |
| Dimensions | 13.8H x 7.5W x 10.6D in | 16.5”H x 9.4”W x 7.3”D |
| Weight | 17.9 lbs (8.1 kg) each | 24.3 lbs (11 kg) each |
| Sensitivity | 86dB | 84.5dB/2.83V/1m (measured, Erin’s Audio Corner) |
| Impedance | 4 ohms | Just under 4 ohms minimum (measured, Erin’s Audio Corner) |
| Spinorama Preference Score | 4.18 | 5.35 |
| Spinorama Preference Score with Perfect Sub | 6.30 | 8.01 |
| Bass Extension (-3dB) | 42Hz (manufacturer specified) | 78Hz (measured, Erin’s Audio Corner) |
| DIY Kit | No | No |
| Woofer Cabinet | - | sealed |
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