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MartinLogan Motion 4 Gloss Black (Ea.) Bookshelf Speaker

MartinLogan  Motion 4 Gloss Black (Ea.) Bookshelf Speaker

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Top Features
  • Two-way, ported design
  • Folded Motion™ tweeter for clarity
  • 4' woofer creates smooth bass
  • Refined sound with excellent range

SKU# 102375


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MartinLogan Motion 4 Gloss Black (Ea.) Bookshelf Speaker

The superb refinement and dynamics you hear from the Motion Series come from a cutting-edge FoldedMotion™ tweeter and stiff, lightweight 4' woofer. They're nestled inside a chic, piano-gloss black enclosure.
Audiophile Performance without an audiophile price
Inspired by the clarity and detail of our ultra-high-end electrostatic loudspeakers, Motion 4 features an exquisite Folded Motion™ tweeter, powerful bass, and folded reflex port technology in a compact and affordable package. Key to Motion 4’s performance is the lightning fast response of the tweeter’s light-weight diaphragm combined with a large surface area (8-times that of a typical one-inch dome tweeter) which together achieve a smooth, refined sound with stunning dynamic range and jawdropping clarity—certain to inspire envy in audiophiles and non-audiophiles alike.

Engineering Genius
What makes the Motion Series sound so amazing? MartinLogan`s dedicated in-house engineering team started by utilizing and refining the most advanced, compact technologies and combining them with innovative engineering. The result is an emotionally engaging sound that rivals (and most times trounces) traditional loudspeakers of similar size and price. Although our engineers won`t reveal exactly how they make the sausage, here are a few technologies that help give MartinLogan Motion Series such a unique sound:

Folded Motion™ Tweeter
Never settle. That`s exactly what`s on the minds of our engineers when they develop every MartinLogan speaker. Just take a look at the innovative Folded Motion Tweeter. This exotic tweeter—you know, similar to other tweeter technologies found on ultra-high-end speakers—helps gives Motion speakers their fantastically realistic highs. Lighting fast transient response, combined with a large surface area (8-times that of a typical 1' dome tweeter) creates clear, highly dynamic and precise sound.

This is one sweet tweeter.
The Folded Motion Tweeter works by moving air (which creates sound) perpendicular to the folded ridges of the diaphragm, similar to how an accordion works. This extremely low mass diaphragm 'squeezes' air and requires almost 90% less excursion than the typical 1' dome tweeter, which drastically minimizes distortion while providing a lighting fast response time. The increased surface area also provides a wide, yet controlled sound dispersion to create a realistic and carefully etched sound stage.

Curve Appeal
Complementing Motion`s sonic accuracy is elegant yet understated styling. Flawless high-gloss, piano black finishes and subtle curves, along with our signature perforated grille, give Motion Series speakers an elegant and timeless look. Tower models feature a real-wood veneer finish and a stylish aesthetic certain to blend with any decor.

The curves also serve a purpose; they allow Motion compact bookshelves 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. Beauty and brains!

Hook-ups, Simplified.
Convenient push-style speaker terminals and curved inserts help guide speaker wire effortlessly into place. The rubber end caps on the terminal are also removable for the use of banana plugs instead of bare wire. So simple, you`ll actually enjoy hooking up these speakers.
Q & A
Features & Specs

Additional Information

Product ID 102375
UPC 877929005368
Brand MartinLogan
SKU 102375
Manufacturers Part Number Motion 4 Gloss Black (Ea.)
Detailed Specifications
  • Frequency Response 70–25,000 Hz ± 3dB
  • Sensitivity 90 dB/2.83 volts/meter
  • Impedance Compatible with 4 Ohms
  • Crossover Frequency 2900 Hz
  • High Frequency Driver 1 x 1.4" (2.6 x 3.6cm) Folded Motion
  • Transducer with 5.25 x 1.75", (13.3 x 4.4cm) diaphragm.
  • Mid/Low Frequency Drivers 4" (10.2cm) paper cone. Ported.
  • Power Handling 75 watts
  • Weight 6 lbs. (2.72kg)
  • Size (HxWxD) 12.6 x 5.6 x 5.25", (32 x 14.2 x 13.3cm)
  • Manufacturer Warranty 5 Year Limited
    Color Black
    Width (inches) 5.6
    Height (inches) 12.6

    MartinLogan Warranty Included:

    5 Year Limited