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Discontinued Product

Martin Logan Motion 4 White Bookshelf Speaker - MO4WH

Abt Model: MO4WH | UPC Code: 810123020584
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Product Details

Martin Logan Motion 4 White Bookshelf Speaker - MO4WH

Inspired by the clarity and detail of our ultra-high-end electrostatic loudspeakers, Motion 4 features an exquisite Folded Motion™ tweeter and powerful bass 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 jaw-dropping clarity—certain to inspire envy in audiophiles and non-audiophiles alike.


  • Folded Motion™ tweeter
  • 4-inch woofer. Paper cone doped for stability and damping. Rigid dust cap
  • Folded bass reflex port
  • Precision Vojtko™ crossover with custom air core coil and low DCR steel laminate inductors, and polyester film and low DF electrolytic capacitors
  • Bookshelf or on-wall installation
  • Convenient push-style binding posts easily adapt to accept banana plugs


  • Frequency Response: 70–25,000 Hz ± 3dB
  • Sensitivity: 90 dB/2.83 volts/meter
  • Nominal Impedance: 4 ohms. Compatible with 4, 6 or 8 ohm rated amplifiers
  • Crossover Frequency: 2900Hz
  • 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) poly cone.
  • Power Handling: 75 watts

Approximate Dimensions:

  • Height: 12.6"
  • Width: 5.6"
  • Depth: 5.25"

Approximate Weight:

  • Unit: 6 lbs
  • Shipping: 7 lbs

Warranty Information:

  • Manufacturer Warranty (authorized online retailer): One Year Parts and Labor
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Key Features
Sold As Each/ 75 Watts Power Handling/ Folded Motion Tweeter/ 4" Woofer/ Paper Cone Doped/ Rigid Dust Cap/ Folded Bass Reflex Port/ Precision Vojtko Crossover With Custom Air Core Coil And Low DCR Steel Laminate Inductors/ Push-Style Binding Posts/ 2900Hz Crossover Frequency/ White Finish
More reasons to buy the MartinLogan MO4WH from Abt Electronics
  • Abt.com is an authorized dealer (Learn More).
  • The MartinLogan MO4WH is Brand New.
  • The MartinLogan MO4WH Ships in a Factory Sealed Box.
  • Abt ships this product for free!
Frequency Response70Hz - 25kHz +/- 3dB
Enclosure MaterialWood
Enclosure TypeBass Reflex (Ported)
Impedance4 Ohms
Magnetic ShieldingNo
Sensitivity90dB spl (2.83 V/m)
Speaker Design2-Way
Speaker TypeBookshelf
Tweeter Size (inches)1.4
Woofer Size (inches)4
Height (inches)12.6
Width (inches)5.6
Depth (inches)5.25


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