MartinLogan Motion XT B100 vs SVS Ultra Evolution Bookshelf
The MartinLogan Motion XT B100 is more sensitive (93 dB vs 87 dB), so it plays louder per watt and costs less ($850 vs $1,200). The SVS Ultra Evolution Bookshelf plays lower (40 Hz vs 45 Hz) and is an easier load for a receiver (6 Ω vs 4 Ω).
What each one works with
Checked against every product in our catalogue by the same engine as the compatibility checker.
| Motion XT B100 | Ultra Evolution Bookshelf | |
|---|---|---|
| Receivers and amps that drive it | 28 of 29, 14 after a setting change | 29 of 29 |
Specs side by side
Values that differ are bold. A dash means that model doesn't publish the spec.
| Motion XT B100 | Ultra Evolution Bookshelf | |
|---|---|---|
| Impedance | 4 Ω | 6 Ω |
| Sensitivity | 93 dB | 87 dB (2.83 V, 1 m) |
| Low end | 45 Hz | 40 Hz |
| Drivers | 1 × 32 mm, 1 × 165 mm | 1 × 25 mm, 1 × 165 mm |
| Size | 8×14×13 in | 9×15×12 in |
| Recommended amplifier power | 20–250 W | 20–150 W |
| Weight | 9.3 kg (20.5 lb) | 8.6 kg (19 lb) |
| MSRP | $850 each (MSRP, September 2026) | $1,200 a pair (MSRP, September 2026) |
Every spec and pairing: MartinLogan Motion XT B100, SVS Ultra Evolution Bookshelf.
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References
- MartinLogan Motion XT B100: Spec sheet, martinlogan.com, retrieved September 15, 2026
- MartinLogan Motion XT B100: Retailer listing, audioadvice.com, retrieved September 15, 2026
- SVS Ultra Evolution Bookshelf: Owner's manual, avstyle.nl, retrieved September 15, 2026
- SVS Ultra Evolution Bookshelf: Independent measurement, ecoustics.com, retrieved September 15, 2026
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