Short answer: the SVS Prime Bookshelf. It ranks #150 of 222 bookshelf speakers by sound quality, rated 3.5/5, at $599. The XTZ Spirit 4 ranks #159, rated 3.4/5, at $477, $122 cheaper, not enough of a saving to outweigh the sound-quality gap.
The XTZ Spirit 4 is the deeper-bass choice. Stand-mount speakers with a waveguide tweeter, adjustable treble and port tuning, wide coverage and fairly deep bass. Its bass reaches about 40Hz before falling 10dB, against 49Hz for the SVS Prime Bookshelf. The catch: The third-party measurement is low confidence.
The SVS Prime Bookshelf is the more accurate pick. Affordable bookshelf speakers with a sealed woofer compartment, wide even dispersion and reasonable sensitivity. Its measured preference score, a predictor of how neutral it sounds, is 5.17 against 4.18 for the XTZ Spirit 4. Watch for: A scooped mid-range paired with a boosted upper mid-range creates an audibly uneven tonal balance, and there’s an additional dip in the treble around 4-5kHz that reads as slightly tinny relative to the recessed mid-range.
Buy the SVS Prime Bookshelf. It is rated higher for sound quality, and the $122 you would save on the XTZ Spirit 4 does not close the gap.
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.
Affordable bookshelf speakers with a sealed woofer compartment, wide even dispersion and reasonable sensitivity.
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Specifications Side By Side
| XTZ Spirit 4 | SVS Prime Bookshelf | |
|---|---|---|
| Price | $477 per pair | $599.00 per pair |
| Ranked | #159 of 222 in Large Size Bookshelf Speakers | #150 of 222 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | about 40.0Hz (measured, Spinorama data) | 49Hz (measured, Erin’s Audio Corner) |
| Enclosure | 2-way passive, rear-ported | - |
| Drivers | 1” dome tweeter, 6.5” woofer | 6.5” polypropylene cone woofer with aluminum shorting ring (sealed sub-compartment), 1” aluminum dome tweeter |
| Dimensions | 13.8H x 7.5W x 10.6D in | 13.2”H x 8”W x 10.2”D (335.3 x 203.2 x 259.1 mm) |
| Weight | 17.9 lbs (8.1 kg) each | 15.5 lbs (7.03 kg) each |
| Sensitivity | 86dB | 87dB (measured average, Erin’s Audio Corner) |
| Impedance | 4 ohms | 8 ohms nominal, 3.9 ohms minimum (measured, Erin’s Audio Corner) |
| Spinorama Preference Score | 4.18 | 5.17 |
| Spinorama Preference Score with Perfect Sub | 6.30 | 7.78 |
| Bass Extension (-3dB) | 42Hz (manufacturer specified) | 72Hz (measured, Erin’s Audio Corner) |
| DIY Kit | No | No |
| Frequency Response | - | 48Hz - 25kHz ±3dB (manufacturer specified) |
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