Short answer: the Ascend Acoustics CMT-340 SE2. It ranks #24 of 222 bookshelf speakers by sound quality, rated 4.4/5, at $798. The XTZ Spirit 4 ranks #159, rated 3.4/5, at $477, $321 cheaper, not enough of a saving to outweigh the sound-quality gap.
The XTZ Spirit 4 is the deeper-bass pick. 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 53Hz for the Ascend Acoustics CMT-340 SE2. The tradeoff: The third-party measurement is low confidence.
The Ascend Acoustics CMT-340 SE2 is the more accurate option. A dual woofer bookshelf speaker with accurate sound, high sensitivity, and lots of clean output, a superb partner for a subwoofer at a modest price. Its measured preference score, a predictor of how neutral it sounds, is 5.33 against 4.18 for the XTZ Spirit 4. The tradeoff: Bass rolls off early for the cabinet size, measuring 77.6Hz at -3dB, 64.5Hz at -6dB, and 48.3Hz at -12dB; the preference score without a subwoofer is only 5.33.
Buy the Ascend Acoustics CMT-340 SE2. It is rated higher for sound quality, and saving $321 with the XTZ Spirit 4 does not make up for the sound-quality gap.
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 dual woofer bookshelf speaker with accurate sound, high sensitivity, and lots of clean output, a superb partner for a subwoofer at a modest price.
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 | Ascend Acoustics CMT-340 SE2 | |
|---|---|---|
| Price | $477 per pair | $798 per pair |
| Ranked | #159 of 222 in Large Size Bookshelf Speakers | #24 of 222 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | about 40.0Hz (measured, Spinorama data) | approximately 53Hz (measured, spinorama.org) |
| Enclosure | 2-way passive, rear-ported | - |
| Drivers | 1” dome tweeter, 6.5” woofer | Two 6.5-inch woofers; 27mm soft-dome tweeter |
| Dimensions | 13.8H x 7.5W x 10.6D in | 21 x 7.5 x 10.5 in each |
| Weight | 17.9 lbs (8.1 kg) each | 29.1 lbs (13.2 kg) each |
| Sensitivity | 86dB | 92dB at 2.83V/1m anechoic |
| Impedance | 4 ohms | 8 ohms nominal |
| Spinorama Preference Score | 4.18 | 5.33 |
| Spinorama Preference Score with Perfect Sub | 6.30 | 7.99 |
| Bass Extension (-3dB) | 42Hz (manufacturer specified) | 77.6Hz (measured, spinorama.org) |
| DIY Kit | No | No |
| Power Handling | - | 240W continuous; 400W short-term peak |
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