The MartinLogan Motion XT B100 is the flagship bookshelf speaker in the Motion XT Series, engineered to deliver reference-quality performance without the footprint of a floorstanding speaker. Combining the advanced Gen2 Obsidian Folded Motion® XT Tweeter with a high-performance 6.5-inch Nomex®-reinforced Kevlar® mid-bass driver, the B100 produces exceptional transparency, dynamic impact, and effortless musicality for both dedicated stereo systems and premium home theater installations.
Its defining feature is the Gen2 Folded Motion® XT Tweeter, which offers approximately 40% more radiating surface area than MartinLogan's standard Folded Motion® tweeter. This larger transducer moves significantly more air while maintaining extremely low distortion, resulting in greater detail, faster transient response, and an expansive, highly accurate soundstage. Paired with the Folded Motion® Waveguide and proprietary McCracken-Vojtko crossover, the speaker delivers controlled dispersion, exceptional imaging, and consistent tonal balance across a wide listening area.
The custom 6.5-inch Nomex®-reinforced Kevlar® cone driver combines outstanding rigidity with low mass to reproduce vocals and instruments with remarkable precision while delivering tight, authoritative bass down to 45 Hz. Its cast aluminum basket, asymmetrical non-resonant chamber, and rear-ported cabinet minimize coloration and resonance, allowing the speaker to maintain exceptional clarity even during demanding musical passages or high-output movie playback. The premium cabinet is finished in Gloss Black, Walnut, or Satin White and includes bi-wire/bi-amp binding posts along with compatibility with MartinLogan's STAND25 speaker stands.
Whether serving as the centerpiece of a reference two-channel audio system or as the main speakers in a high-end home theater, the Motion XT B100 delivers the refinement, speed, and realism expected from MartinLogan's most advanced bookshelf loudspeaker. Its combination of cutting-edge driver technology, meticulous acoustic engineering, and elegant industrial design makes it an outstanding choice for discerning listeners seeking uncompromising performance in a compact form factor.
- Component type: Premium 2-way bookshelf / stand-mount speaker
- High-frequency driver: Gen2 Obsidian Folded Motion® XT Tweeter with Folded Motion® Waveguide
- Mid-bass driver: 6.5-inch Nomex®-reinforced Kevlar® cone with cast aluminum basket and non-resonant asymmetrical chamber
- Frequency response: 45 Hz – 25 kHz (±3 dB)
- Sensitivity: 93 dB (2.83V/1m)
- Impedance: 4 ohms (compatible with 4, 6, or 8-ohm amplifiers)
- Recommended amplifier power: 20–250 W
- Crossover frequency: 2,600 Hz
- Tweeter dispersion: 90° horizontal × 45° vertical
- Inputs: Custom bi-wire / bi-amp capable 5-way binding posts
- Enclosure: Rear-ported bass reflex cabinet
- Dimensions (H × W × D): 14.5 × 8 × 12.5 in (36.8 × 20.3 × 31.8 cm)
- Weight: 20.5 lb (9.3 kg)
- Finishes: Gloss Black, Walnut, Satin White
- Design features: Gen2 Folded Motion® XT Tweeter with 40% larger radiating surface, Folded Motion® Waveguide, McCracken-Vojtko crossover, Nomex®-reinforced Kevlar® driver, STAND25 compatible, premium cabinet construction