Short answer: the GR-Research NX-Studio if sound quality matters most, the XTZ Spirit 4 if price matters most. The GR-Research NX-Studio ranks #4 of 222 bookshelf speakers, rated 4.8/5, at $3,630. The XTZ Spirit 4 ranks #159, rated 3.4/5, at $477, $3,153 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 GR-Research NX-Studio is the better-sounding pick. A DIY kit bookshelf speaker with a ribbon tweeter for wide open, detailed sound, superb imaging, and tight, fast sealed bass. The tradeoff: Bass will be very tight but won’t be quite as deep as others due to the sealed woofer enclosure.
Buy the XTZ Spirit 4 when the price outweighs sound quality for you, and the GR-Research NX-Studio when sound quality outweighs the price instead.
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.
A DIY kit bookshelf speaker with a ribbon tweeter for wide open, detailed sound, superb imaging, and tight, fast sealed bass.
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.
As an eBay Partner, we may be compensated if you make a purchase.
Specifications Side By Side
| XTZ Spirit 4 | GR-Research NX-Studio | |
|---|---|---|
| Price | $477 per pair | $3630 per pair |
| Ranked | #159 of 222 in Large Size Bookshelf Speakers | #4 of 222 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | about 40.0Hz (measured, Spinorama data) | - |
| Enclosure | 2-way passive, rear-ported | - |
| Drivers | 1” dome tweeter, 6.5” woofer | GR-Research M165NQ 6.5” paper cone, non-resonant polymer frame, copper shorting rings and aluminum phase plug sealed enclosure woofer, GR-Research Neo3 Planar Magnetic Ribbon open baffle tweeter |
| Dimensions | 13.8H x 7.5W x 10.6D in | 18”H x 8.5”W x 15.5”D (457.2 x 215.9 x 393.7 mm) |
| Weight | 17.9 lbs (8.1 kg) each | 20.5 lbs (9.3 kg) each |
| Sensitivity | 86dB | 87dB |
| Impedance | 4 ohms | 8 ohms |
| Spinorama Preference Score | 4.18 | - |
| Spinorama Preference Score with Perfect Sub | 6.30 | - |
| Bass Extension (-3dB) | 42Hz (manufacturer specified) | - |
| DIY Kit | No | Yes |
| Woofer Cabinet | - | sealed |
Related Speaker Comparisons
More worthwhile head-to-heads for GR-Research NX-Studio: