The MartinLogan Motion XT B100 ranks #78 out of 122 total Large Size Bookshelf Speakers for sound quality. See Top Recommended Speakers By Attribute for all the top speaker suggestions.
Brand: MartinLogan
Prices on this page were last checked August 24, 2026 at 6:53 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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#78 MartinLogan Motion XT B100: $849.99 each MartinLogan Dealer Network eBay
Pros: A premium 6.5-inch standmount with MartinLogan’s large folded-motion tweeter and high rated sensitivity. Erin’s data predicts 55Hz in-room extension, a 5.48 subwoofer-assisted preference score and good 0.153 sound-power smoothness.
Cons: The measured response rises strongly at +0.84dB per octave and directivity-index consistency is a poor 4.34, so tonal balance and off-axis behavior are less neutral than the price implies. The cabinet is large, heavy and $1,700 per pair before stands.
How it compares: Just above it: Mission LX-3 MKII - 5Hz lower bass extension (-3dB). Just below it: GR-Research X-LS Encore - $450 more, 8.6Hz lower bass extension (-3dB).
| Country | United States (design) |
|---|---|
| Dimensions | 14.5H x 8W x 12.5D in |
| Drivers | 1.25 x 2.4" folded-motion XT tweeter, 6.5" Kevlar woofer |
| Enclosure | 2-way, rear-ported |
| Impedance | 4 ohms |
| Sensitivity | 93dB |
| Weight | 20.5 lbs each |
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