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The secret to Motion 40i's outstanding performance lies in its Folded Motion® tweeter, 5.5-inch aluminum cone midrange driver, dual 6.5-inch aluminum cone woofers with a rear-firing bass port, and a proprietary Vojtko crossover network. This double woofer design produces vibrant, accurate deep bass performance. Motion 40i delivers the classic broad soundstage of the Motion Series from a newly designed enclosure enhanced by the slightest of modifications, including the drive-stabilizing dust cap design, stiffened motor suspension, and low-mounted woofers to reduce an acoustically harmful phenomenon known as floor bounce. The speaker's enclosure sports a reinforced baffle and a fabric grille.  



MartinLogan's premier Motion Series speakers are available in three luxurious finishes and matching metallic trim - gloss black with black grilles and gunmetal grey trim, matte white with silver grilles and silver trim, and red walnut with black grilles and champagne colored trim.

Martin Logan Motion 40i Floorstanding Speakers - Pair


    Frequency Response: 40-25,000 Hz ±3dB 


    Recommended Amplifier Power: 20-300 watts per channel 


    Horizontal Dispersion: 80° 


    Vertical Dispersion: 80°  


    Sensitivity: 92 dB/2.83 volts/ meter 


    Impedance: 4 Ohms. Compatible with 4, 6, or 8 Ohm rated amplifiers  


    Crossover Frequency: 500 & 2,600 Hz  


    High Frequency Transducer:  1" × 1.4" (2.6cm × 3.6cm) Folded Motion Transducer with 5.25" x 1.75" (13.3cm × 4.4cm) diaphragm.


    Mid Frequency Transducer:  5.5” (14cm) aluminum cone in a non-resonant asymmetrical chamber format.  Cast polymer basket. Rigid structured dust cap to reduce cone break-up modes.


    Low Frequency Transducer:   Two 6.5" (16.5cm) aluminum cone woofers in a non-resonant asymmetrical chamber format. Cast polymer basket. Rigid structured dust cap to reduce cone break-up modes.


    Components:  Precision Vojtko™ with custom air core coil and low DCR steel laminate inductors. Polyester film capacitors in series and low DF electrolytic capacitors in parallel.  Tweeter thermal/current protection.


    Inputs: Custom 5-way bi-wire tool-less binding posts  


    Dimension: 42.5" x 7.6" x 12.8"


    Weight: 45 Lbs. 


    Available finishes: Gloss Black.




    Specifications are subject to change without notice


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