Sign Up & Save 10%

Hablamos Español 1-877-246-5427

MartinLogan Motion 4i

Motion 4i Compact Speaker

Be the first to review this product

$249.95 / EA

Audiogurus Knowledge Base

- View More

  • Focal Sib & Co, Dome, and EASYA Speakers - FNA 2015 Event
  • 2015 Focal North America Event - Day 1
  • Adding a Subwoofer to Your Home Theater



Audiophile Performance Without an Audiophile Price

Motion® i Compact Speakers

Inspired by the clarity and detail of MartinLogan’s ultra-high-end electrostatic loudspeakers, Motion 4i features exquisite Folded Motion tweeters and powerful bass technology in compact and affordable packages.

Folded Motion Tweeter

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 jaw-dropping 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.

Engineered Curves

Flexible installation options allow table top or on-wall installation. The Motion 4i bookshelf speaker can be mount upside down to facilitate placement high on a wall.


Color Gloss black
DLNA Certified No
Dimensions (WxHxD) 5.6" x 12.6” x 5.7”
Dimensions (WxHxD, metric) -
Dimensions (notes) -
Weight (lbs) 6
Unit of measurement EA
Power Handling (Nominal) 20-150
Frequency Response +/-3dB 70–23,000 Hz
Sensitivity (1W/m) 90 dB
Terminals No
Impedance 4 Ohms
Tweeter No
Midrange Driver N/A
Woofer Poly
Crossover Frequencies 2,900 Hz
Crossover Type -


More Info