Inspired by the clarity and detail of MartinLogan's ultra-high-end electrostatic loudspeakers, Motion 4i features a Folded Motion tweeter, 4-inch paper cone woofer, and a proprietary Vojtko crossover network in a compact and affordable package. Low-frequencies are enhanced by a rear-firing Cascading Bass Reflex Port, a unique, long-volume port that delivers surprisingly big bass from a remarkably compact loudspeaker. Flexible installation options allow table top or on-wall installation. Motion 4i can also mount upside down to facilitate placement high on a wall. Available in gloss black.
Engineering, Without Compromises
What makes the Motion Series sound so amazing? MartinLogan's dedicated in-house engineering and design team started by utilizing and refining the most advanced, compact technologies and combining them with innovative engineering and time-honored cabinet construction techniques. The result is an emotionally engaging sound that rivals (and most times trounces) traditional loudspeakers of similar size and price. MartinLogan's 'no compromise' philosophy gives Motion Series a unique sound you won't find anywhere else.
Sound Inspired by Electrostatic Speakers
The success of the Motion Series is directly attributed to its close relation to MartinLogan’s legendary ultra-high-end electrostatic loudspeakers. The desire to transmute that level of performance into a more traditional loudspeaker at a more affordable price drove the initial design imperatives that created the Motion Series.
Folded Motion Tweeter
MartinLogan's signature Folded Motion tweeter utilizes an extremely low mass diaphragm that "squeezes" air, thus demanding significantly less excursion than the typical 1-inch dome tweeter. Its folded design allows for a much larger surface area (compared to that of a regular 1-inch dome tweeter), controlled dispersion characteristics, and vanishingly low distortion. It's a miracle of audio engineering that's able to deliver much of the high-frequency detail and speed of a large, dynamic electrostatic panel in a small space.
Proprietary Vojtko Crossover Network
The Motion 4i speakers feature proprietary Vojtko crossover networks using custom air core coil inductors, low DCR steel laminate inductors, and polyester film and low-DF electrolytic capacitors for a seamless sonic presentation.
Vojtko crossovers are named after MartinLogan's chief audio technologist, Joe Vojtko. His unique approach to crossover design is as big of a part of the "MartinLogan Sound" as are electrostatic and Folded Motion thin-film driver technologies. A Vojtko crossover isn't so much a set of design requirements as it is a philosophy. Vojtko crossovers are designed in such a way that all drivers are kept within their optimal frequency range and balanced with one another. The drivers themselves are as much a part of a Vojtko crossover as are capacitors and resistors. Before the design of any crossover begins, drivers are carefully selected or designed to operate within a very intentional frequency range and with precise and predictable performance parameters. Vojtko crossovers are always built from high-quality parts, and care is taken to avoid overly complex topologies—a straightforward objective due to the careful selection of woofers and tweeters. The final (and most critical) aspect of a Vojtko Crossover is that final voicing is conducted in a space that is indicative of a real-world environment. This pragmatic approach allows MartinLogan speakers to sound their best in real-world rooms.
Cascading Bass Reflex Port
MartinLogan engineers were faced with a daunting task—create a compact speaker with low-end bass reproduction found in speakers much, much larger. After many sleepless nights and a myriad of prototypes, they created the Cascading Bass Reflex Port. This brilliant solution allows a long tuned port, which is folded over itself (think of a trombone's tuning arm) to be compacted and squeezed into the Motion 4i. The result is amazingly detailed low bass that can play at high volumes with minimum distortion—all thanks to the elegantly simple cascading fold that slows down and controls the air motion of the bass waves.
Easy Hookup
Convenient, high-quality, push-style binding posts are recessed into the speaker's cabinet along with curved guides that allow wires to slide into place effortlessly. These binding posts are also designed to facilitate the use of banana plug connectors.
Modern Curves and Luxurious Finish
After refining the perfecting the acoustic details, MartinLogan designers focused on elegant yet understated styling that complements flat-panel televisions and other high-end components. To achieve this, Motion 4i speakers were given a flawless gloss black finish and compact, slender enclosures. Subtle curves, along with MartinLogan's signature perforated grille, add to the elegant and timeless look.
Versatile Placement—On a Wall, Shelf, or Stands
Not only do the curves on the compact Motion bookshelf speaker Series look great, but they also serve a purpose—allowing them to mount at two different angles with the included wall bracket. This means you can point sound directly toward the desired listening area for high or low wall mounting applications. Motion 4i speakers don't have to be mounted. In fact, they look and sound great on speaker stands, or sitting next to your TV on a shelf.
Martin Logan is a Canadian/US company producing conventional subwoofer speakers as well as floor-standing, wall-mounted, and in-wall hybrid speakers using electrostatic loudspeaker and planar magnetic thin film loudspeaker technology.In 1989, and again in 1990, Inc. magazine recognized MartinLogan as one of the 500 fastest-growing privately held companies in the United States.The early 1990s saw the rise of home theater with the availability of new multi-channel sources. MartinLogan delivered the world’s first electrostatic center-channel speaker, Logos, and on-wall surround-channel speakers, Stylos. Engineered for instant, accurate response, and matched to the performance levels of existing electrostatic loudspeakers, these utterly new designs established MartinLogan as a major force in home theater.By the mid-aughts, with the development of more advanced technology, MartinLogan personified superior quality and performance in the rarified electrostatic loudspeaker space. This reputation was bolstered by groundbreaking innovations throughout the early decade of the new century. These included the development of MicroPerf ESL stator technology, as well as the first use of non-ESL Advanced Thin Films. This was the seed that would ultimately bloom as Folded Motion tweeter technology.The high-end Summit electrostatic loudspeaker, first introduced in 2005, garnered rave reviews from the professional audio press for both performance and design. It pioneered the use of MartinLogan’s Ultra-Rigid AirFrame, a precision-manufactured panel frame that improved stability, and thus imaging and detail.Today, MartinLogan continues in the tradition of its innovative founders, with hands-on design and engineering, and proprietary manufacturing techniques. Constant improvements on the vanguard of electrostatic and thin film transducer technology keep MartinLogan on the cutting edge of audio innovation.
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