Short answer: the Klipsch RP-600M II. It ranks #123 of 222 bookshelf speakers by sound quality, rated 3.7/5, at $449.99; the XTZ Spirit 4 ranks #159, rated 3.4/5, and costs $477, so there is not much of a tradeoff to weigh.
The Klipsch RP-600M II is the more accurate choice. Bookshelf speakers with a large horn tweeter, wide soundstage, high efficiency and bi-amp ready terminals. Its measured preference score, a predictor of how neutral it sounds, is 5.64 against 4.18 for the XTZ Spirit 4. Watch for: On-axis, the treble runs notably hot (even hotter than the original Klipsch RP-600M in some respects) and needs about 20° of toe-out or the grille installed to sound balanced.
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.
Buy the Klipsch RP-600M II. It is rated higher for sound quality than the XTZ Spirit 4 and costs less, so only choose the other one for a particular feature it does better.
Want more options? Browse the full Passive Home rankings.
Bookshelf speakers with a large horn tweeter, wide soundstage, high efficiency and bi-amp ready terminals.
Stand-mount speakers with a waveguide tweeter, adjustable treble and port tuning, wide coverage and fairly deep bass.
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Specifications Side By Side
| Klipsch RP-600M II | XTZ Spirit 4 | |
|---|---|---|
| Price | $449.99 per pair | $477 per pair |
| Ranked | #123 of 222 in Large Size Bookshelf Speakers | #159 of 222 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 41Hz (measured, Erin’s Audio Corner) | about 40.0Hz (measured, Spinorama data) |
| Bass Extension (-3dB) | 70Hz (measured, Erin’s Audio Corner) | 42Hz (manufacturer specified) |
| Dimensions | 15.7”H x 8”W x 12.5”D (398.8 x 203.2 x 317.5 mm) | 13.8H x 7.5W x 10.6D in |
| Impedance | 8 ohms nominal (3.5 ohms minimum above 80Hz, measured by Erin’s Audio Corner) | 4 ohms |
| Sensitivity | 86dB (measured, Erin’s Audio Corner) | 86dB |
| Drivers | 6.5” Cerametallic cone woofer, 1” titanium LTS vented tweeter with Tractrix horn | 1” dome tweeter, 6.5” woofer |
| Weight | 13 lbs (5.9 kg) each | 17.9 lbs (8.1 kg) each |
| Woofer Cabinet | ported | - |
| Spinorama Preference Score | 5.64 | 4.18 |
| Spinorama Preference Score with Perfect Sub | 7.77 | 6.30 |
| DIY Kit | No | No |
| Enclosure | - | 2-way passive, rear-ported |
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