Details from MartinLogan
A top-notch bookshelf speaker
The MartinLogan Motion 15i takes up relatively little space, and delivers a disproportionately large sound. This upgraded successor to the popular Motion 15 adds a drive-stabilizing inverted dust cap and stiffened motor suspension for the woofer. Because details matter.
A solid mid- and low-frequency foundation
MartinLogan uses aluminum cones for their unique blend of lightness and rigidity. This speaker’s 5-1/4″ woofer blends warm and neutral midrange frequencies with surprisingly solid low end. The rear-firing bass port helps efficiently enhance bass response without adding distortion.
Detail and precision from the Folded Motion™ tweeter
Perched above the Motion 15i’s woofer is the source of this speaker’s impressive high-frequency performance — MartinLogan’s acclaimed Folded Motion tweeter. Its pleated diaphragm works similarly to an accordion by “squeezing” air to create sound. Because it requires almost 90% less excursion than the typical 1″ dome tweeter, response time and distortion are drastically reduced. The diaphragm’s increased surface area also provides wide, yet controlled sound dispersion to create a realistic and highly accurate soundstage.
Unique crossover network
Motion Series speakers feature proprietary Vojtko™ crossovers, named after MartinLogan’s chief audio technologist, Joe Vojtko. “A Vojtko crossover isn’t so much a set of design requirements as it is a philosophy,” the company explains. Each speaker’s drivers are carefully selected or designed to operate within an intentional frequency range and specific performance parameters. That allows the crossover networks — built from high-quality capacitors and resistors — to be clean and uncomplicated.
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