The Sound of Invisibility:
Folded Motion® Tweeters
MartinLogan's signature Folded Motion Tweeter utilizes an extremely low-mass diaphragm that "squeezes" air, thus requiring 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 delivers much of the high-frequency detail, speed and response of a large, dynamic electrostatic panel in a small space.
This thin-film transducer design packs all the accuracy and delicacy of an electrostatic panel into a small space. Folding the dramatically lightweight film into an accordion-like structure increases the surface area, giving Folded Motion tweeters eight to ten times greater surface area than typical tweeters. This ideal combination of light and large produces superior accuracy, extended frequency bandwidth and higher output capability; all with a faster, more efficient transient response, and virtually zero distortion. In these characteristics, the Folded Motion Tweeter design can mimic the performance of a large electrostatic panel in the confines of a more traditional loudspeaker enclosure.
Woven Fiberglass Cones
All Motion CI speakers feature lightweight woven fiberglass cones specifically engineered for their application to blend seamlessly with the lightning speed of our signature Folded Motion Tweeter. No matter which Motion CI speaker you choose for your room, rest assured they are designed to provide a consistently high level of performance and can easily be used with other MartinLogan speakers to make creating the perfect system for your unique listening space that much easier.
The MartinLogan Sound
MartinLogan Motion CI speakers sound great in any room. Regardless of the environment, our speakers just sound better, more articulate, more detailed, and more realistic. With Controlled Dispersion and one of the most responsive tweeters in the industry, our in-wall and in-ceiling models can compete with and often exceed the performance of traditional cabinet speakers.MartinLogan Motion CI speakers sound great in any room. Regardless of the environment, our speakers just sound better, more articulate, more detailed, and more realistic. With Controlled Dispersion and one of the most responsive tweeters in the industry, our in-wall and in-ceiling models can compete with and often exceed the performance of traditional cabinet speakers.
Spring-Loaded Binding Posts
With easy pre-installation access, our spring-loaded binding posts feature a large 4.5mm wire access hole and connect via banana plug, pin, or 12AWG bare wire.
Micro-Perforated Grilles
MC4 features an ultra-low profile, paintable, micro-perforated grilles with no visible bezel for a near-invisible integration into any wall or ceiling. A series of powerful magnets hidden inside the speaker quickly secure grilles into place, reducing the risk of warping or damage during installation. Optional square grilles are available for the MC4.
Proprietary Vojtko™ Crossover Networks
Vojtko Crossovers are named after MartinLogan's chief audio technologist, Joe Vojtko.
His unique approach to crossover design is just as crucial to MartinLogan's Truth in Sound as are our innovative electrostatic and Folded Motion thin-film driver technologies. A Vojtko Crossover isn't just a set of design requirements; it's a philosophy.
Vojtko Crossovers are hand-built from the highest quality components and avoid overly complex topologies. This crossover has a straightforward objective: breathtaking realism.
Hand-Selected Components
In designing each crossover topology, we take the drivers themselves into consideration. Carefully selected drivers, engineered for specific performance characteristics, are kept within their optimal frequency range by the custom Vojtko Crossover.
Each crossover is handcrafted using exceptional polypropylene and polyester capacitors, custom wound and large steel laminate low-DCR inductors, and double thick PCBs. This precision-tuned network preserves even the most microscopic sonic nuances while handling the full dynamics of any source. It's a recipe for vanishingly low distortion and seamless driver integration.
The most critical aspect of a Vojtko Crossover design is the final voicing, always conducted in a real-world environment. This uniquely pragmatic approach guarantees that even the most amazing MartinLogan loudspeakers deliver Truth in Sound in any room, including yours.
Specifications
Frequency Response:
61 - 25,000 Hz ±3dB
Tweeter Dispersion (horizontal x vertical):
80 x 30 degrees
Recommended Amplifier Power Range:
50 – 250 Watts
Sensitivity:
92dB @ 2.83V / 1 meter
Impedance:
4 ohms. Compatible with 8 ohms
High Frequency Driver:
FMT Transducer
- 1.27” x 2.4” (3.22cm x 6.09cm) Opening
- 4.5” x 2.75” (11.43cm x 6.98cm) Diaphragm
Crossover Frequency:
2,180 Hz
Crossover Type:
2-way
Driver Configuration:
1 x 1.27” x 2.75” FMT, 2 x 5.25” Woofers
Woofer Specifications:
- Two 5.25” (13.33 cm) cast aluminum basket
- Black Kevlar with Nomex backer cone, Open back chamber format
- Concave dust cap
Cabinet Material:
Black with White Paintable Grill
Connector:
Push style
Components:
Custom air core coil inductors, polyester film capacitors in series, and low DF electrolytic capacitors FMT thermal/current protection
Max Power Handling:
125 Watts
Weight:
9.8 lbs. (4.4 kg) each
Dimensions (overall size):
7.87” x 15.79” x 3.32”
(20 x 40.1 x 8.43cm)
Required Wall Opening (includes tolerance):
14.5” x 6.5”
(36.8 x 16.5cm)
Projection From Wall Surface:
0.12” (0.3cm)
Depth Behind Wall Surface:
3.20” (8.13cm)
