Motion 4

About the Motion 4

The MartinLogan Motion 4 is a powerful compact bookshelf speaker designed to deliver stunning sound with a smooth, refined audio profile and impressive dynamic range. It features a 1" x 1.4" Folded Motion tweeter with a large diaphragm for lightning-fast response and clarity, paired with a 4" paper cone woofer with a rigid dust cap for stable, detailed bass. The speaker uses a Folded Motion Cascading Bass-Reflex Port, a unique folded bass port design that allows deep bass extension down to 70 Hz in a compact enclosure. The cabinet is elegantly curved with a high-gloss black or white piano lacquer finish and includes a wall mount bracket for flexible installation options. The Motion 4 is suitable for bookshelf, stand, or on-wall placement and is designed to handle 20 to 150 watts of amplifier power with a sensitivity of 90 dB and 4 ohm impedance. It weighs 6 lbs and measures approximately 12.6" H x 5.6" W x 5.25" D. The speaker comes with a 5-year warranty with product registration and includes accessories such as a wall bracket, screws, drywall anchors, rubber pads, cleaning cloth, and user manual.