Short answer: the MoFi SourcePoint 10 for better sound quality, the XTZ Spirit 4 for the lower price. The MoFi SourcePoint 10 ranks #26 of 130 bookshelf speakers at $3795. The XTZ Spirit 4 ranks #92 at $477, $3318 cheaper.
What the XTZ Spirit 4 offers: Substantial 6.5-inch stand-mount with a waveguided dome tweeter, adjustable treble level and port tuning. Spinorama predicts 44Hz in-room extension, broad roughly +/-60-degree horizontal coverage and a 5.39 preference score with a subwoofer. Watch for: The third-party measurement is low confidence. On-axis smoothness is only 0.248, directivity-index consistency is middling at 3.21, and the mildly downward -0.29dB/octave tonal slope contributes to a modest 3.27 raw preference score.
What the MoFi SourcePoint 10 offers: Andrew Jones-designed concentric/coincident driver delivers best-in-class sound power and early-reflections directivity in the reviewer’s testing - a genuine “point source” design. Vertical and horizontal radiation patterns closely match each other (about ±50° horizontal, ±30-40° vertical), a hallmark benefit of a well-executed concentric driver. Distortion stays low - under 1% above 100Hz at 86dB, and under 3% up to 100Hz even at 96dB, better than the reviewer expected from a low-excursion waveguide-loaded woofer. Surprisingly strong dynamic capability with little audible compression at both low and high volume. Widely spaced (about 11 feet apart) with roughly 15° of toe-out produced a huge, expansive soundstage without significant loss of imaging precision. Solidly built cabinet (about 40 lbs, heavily braced) minimizes cabinet resonance. Watch for: Like virtually all coincident designs, sounds notably bright pointed directly on-axis due to a deliberate treble lift (meant to compensate for the 28mm tweeter’s earlier beaming versus a typical 25mm/1” tweeter) combined with a diffraction dip/peak from the waveguide edge; needs about 15° of toe-out to sound neutral, and even then benefits from an extra 1-2dB of treble EQ. Toeing out further (to 30°) flattens the treble further but introduces a dip in the midrange-to-tweeter crossover region - there’s no single toe-out angle that fixes everything at once. F3 of 56Hz and F10 of 38Hz (about 40Hz in-room) mean genuine deep bass is limited; the reviewer would pair it with a sealed 10” or 12” subwoofer for regular daily listening. Bass extension and cabinet placement trade off against midrange cleanliness: placing it close to a wall for more bass risks a wall-bounce suckout in the midrange (roughly 200-500Hz depending on distance). Not perfectly time-aligned between tweeter and woofer (about 0.4ms delta), an inherent limitation of passive coincident drivers versus actively time-corrected designs. Some resonances appear in measurements, likely port-related. Minimum impedance around 6.4 ohms with EPDR near 3 ohms, so the reviewer recommends sticking with a 4-ohm-rated amplifier to be safe.
Buy the XTZ Spirit 4 if the price matters more than sound quality. Buy the MoFi SourcePoint 10 if sound quality matters more than the price.
Looking for alternatives? See the complete Passive Home rankings.
Specifications Side By Side
| XTZ Spirit 4 | MoFi SourcePoint 10 | |
|---|---|---|
| Price | $477 per pair | $3795 per pair |
| Ranked | #92 of 130 in Large Size Bookshelf Speakers | #26 of 130 in Large Size Bookshelf Speakers |
| Enclosure | 2-way passive, rear-ported | - |
| Drivers | 1" dome tweeter, 6.5" woofer | 10" Paper-pulp Cone woofer, 1.25-inch soft-dome tweeter |
| Dimensions | 13.8H x 7.5W x 10.6D in | 22.5"H x 14.5"W x 16.6"D (571.5 x 368.3 x 421.6 mm) |
| Weight | 17.9 lbs (8.1 kg) each | 46.3 lbs (21.0 kg) each |
| Sensitivity | 86dB | 88.2dB (measured, Erin's Audio Corner) |
| Impedance | 4 ohms | 8 ohms nominal, 6.4 ohms minimum (measured, Erin's Audio Corner) |
| Spinorama Preference Score | 3.27 | 3.25 |
| Spinorama Preference Score with Perfect Sub | 5.39 | 5.27 |
| Bass Extension (-10dB) | - | 38Hz (measured, Erin's Audio Corner) |
| Bass Extension (-3dB) | - | 56Hz (measured, Erin's Audio Corner) |
| Woofer Cabinet | - | ported, rear |
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Prices on this page were last checked September 16, 2026 at 12:41 AM 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
XTZ Spirit 4: $477 per pair XTZ eBay
Pros: Substantial 6.5-inch stand-mount with a waveguided dome tweeter, adjustable treble level and port tuning. Spinorama predicts 44Hz in-room extension, broad roughly +/-60-degree horizontal coverage and a 5.39 preference score with a subwoofer.
Cons: The third-party measurement is low confidence. On-axis smoothness is only 0.248, directivity-index consistency is middling at 3.21, and the mildly downward -0.29dB/octave tonal slope contributes to a modest 3.27 raw preference score.
Full XTZ Spirit 4 review and specifications →
| Dimensions | 13.8H x 7.5W x 10.6D in |
|---|---|
| Drivers | 1" dome tweeter, 6.5" woofer |
| Enclosure | 2-way passive, rear-ported |
| Impedance | 4 ohms |
| Sensitivity | 86dB |
| Spinorama Preference Score | 3.27 |
| Spinorama Preference Score with Perfect Sub | 5.39 |
| Weight | 17.9 lbs (8.1 kg) each |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- XTZ Spirit 4 vs Sonus Faber Lumina II
- XTZ Spirit 4 vs KEF Q3 Meta
- XTZ Spirit 4 vs SVS Prime Bookshelf
- XTZ Spirit 4 vs ELAC Debut 2.0 B6.2
- XTZ Spirit 4 vs Polk R200
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- XTZ Spirit 4 vs GR-Research X-LS Encore
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- See all 44 comparisons
MoFi SourcePoint 10: $3795 per pair Crutchfield eBay
Pros: Andrew Jones-designed concentric/coincident driver delivers best-in-class sound power and early-reflections directivity in the reviewer’s testing - a genuine “point source” design. Vertical and horizontal radiation patterns closely match each other (about ±50° horizontal, ±30-40° vertical), a hallmark benefit of a well-executed concentric driver. Distortion stays low - under 1% above 100Hz at 86dB, and under 3% up to 100Hz even at 96dB, better than the reviewer expected from a low-excursion waveguide-loaded woofer. Surprisingly strong dynamic capability with little audible compression at both low and high volume. Widely spaced (about 11 feet apart) with roughly 15° of toe-out produced a huge, expansive soundstage without significant loss of imaging precision. Solidly built cabinet (about 40 lbs, heavily braced) minimizes cabinet resonance. Measured bass extension of 56Hz (-3dB), with a measured sensitivity of 88.2dB.
Cons: Like virtually all coincident designs, sounds notably bright pointed directly on-axis due to a deliberate treble lift (meant to compensate for the 28mm tweeter’s earlier beaming versus a typical 25mm/1” tweeter) combined with a diffraction dip/peak from the waveguide edge; needs about 15° of toe-out to sound neutral, and even then benefits from an extra 1-2dB of treble EQ. Toeing out further (to 30°) flattens the treble further but introduces a dip in the midrange-to-tweeter crossover region - there’s no single toe-out angle that fixes everything at once. F3 of 56Hz and F10 of 38Hz (about 40Hz in-room) mean genuine deep bass is limited; the reviewer would pair it with a sealed 10” or 12” subwoofer for regular daily listening. Bass extension and cabinet placement trade off against midrange cleanliness: placing it close to a wall for more bass risks a wall-bounce suckout in the midrange (roughly 200-500Hz depending on distance). Not perfectly time-aligned between tweeter and woofer (about 0.4ms delta), an inherent limitation of passive coincident drivers versus actively time-corrected designs. Some resonances appear in measurements, likely port-related. Minimum impedance around 6.4 ohms with EPDR near 3 ohms, so the reviewer recommends sticking with a 4-ohm-rated amplifier to be safe.
Full MoFi SourcePoint 10 review and specifications →
| Bass Extension (-10dB) | 38Hz (measured, Erin's Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 56Hz (measured, Erin's Audio Corner) |
| Dimensions | 22.5"H x 14.5"W x 16.6"D (571.5 x 368.3 x 421.6 mm) |
| Drivers | 10" Paper-pulp Cone woofer, 1.25-inch soft-dome tweeter |
| Impedance | 8 ohms nominal, 6.4 ohms minimum (measured, Erin's Audio Corner) |
| Sensitivity | 88.2dB (measured, Erin's Audio Corner) |
| Spinorama Preference Score | 3.25 |
| Spinorama Preference Score with Perfect Sub | 5.27 |
| Weight | 46.3 lbs (21.0 kg) each |
| Woofer Cabinet | ported, rear |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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