Martin Logan Motion 4i Gloss Black Bookshelf Speaker w/wall-mount bracket - Each


Inspired by the clarity and detail of MartinLogan’s ultra–high–end electrostatic loudspeakers, Motion 2i, 4i, 6i, and 8i feature exquisite Folded Motion tweeters and powerful bass technology in compact and affordable packages. Key to performance is the lightning fast response of the tweeter’s light–weight diaphragm combined with a large surface area (much larger than 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. Precision Vojtko™ crossover topology features custom air core coil inductors, low DCR steel laminate inductors, and polyester film and low DF electrolytic capacitors for a seamless sonic presentation. Flexible installation options allow table top or on–wall installation of all four speakers. Motion 2i and 4i bookshelf speakers can also mount upside down to facilitate placement high on a wall. Motion 6i and 8i can mount horizontally or vertically around a wall–mounted flat screen television.

  • Audiophile performance without an audiophile price
  • Folded bass reflex port
  • Gorgeous black gloss finish
  • 2,900 Hz crossover frequency

Martin Logan Motion 4i Gloss Black Bookshelf Speaker w/wall-mount bracket - Each

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SKU MOTION4I Categories ,


  • System Frequency Response: 70–23,000 Hz ±3 dB
  • Dispersion: 80° x 80
  • Recommended Amplifier Power: 20–150 Watts
  • Maximum Input Power: 75 Watts
  • Sensitivity: 90 dB @2.83 volts/meter
  • Impedance: 4 Ohms. Compatible with 4, 6, or 8 Ohm rated amplifiers.
  • Crossover Frequency: 2,900 Hz
  • High Frequency Driver: 1” x 1.4” (2.6cm x 3.6cm) Folded Motion Transducer with 5.25” x 1.75” (13.3cm x 4.4cm) diaphragm.
  • Low Frequency Driver: 4” (10.2cm) paper cone with stamped steel basket. Non–resonant asymmetrical chamber format. Rigid structured dust cap to reduce cone break–up modes.
  • Components: Custom air core coil and low DCR steel laminate inductors. Polyester film capacitors in series and low DF electrolytic capacitors in parallel. Overall system thermal/current protection.
  • Controls: Folded Bass Reflex Port
  • Binding Post Inputs: Push style with banana jacks
  • Finish: Gloss Black
  • Width: 5.6″
  • Height: 12.6″
  • Depth: 5.7″
  • Weight: 6 lbs


Martin Logan

Additional information

Weight 13 lbs
Dimensions 18 × 9 × 7 in
Sold as




Speaker Placement

Front – Left / Right, Rear / Surround


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