MartinLogan Motion 4i

Motion 4i by MartinLogan

Overview:
The Motion 4i by MartinLogan brings audiophile-quality performance to a compact and affordable design. Inspired by the precision and clarity of MartinLogan’s high-end electrostatic loudspeakers, the Motion 4i incorporates a Folded Motion tweeter, a 4-inch paper cone woofer, and a proprietary Vojtko crossover network. Enhanced low frequencies are achieved through a rear-firing Cascading Bass Reflex Port, providing deep bass despite the compact size of the speaker. With flexible installation options, the Motion 4i is perfect for use as a bookshelf or center channel speaker, and can be placed on a table or mounted on the wall. Available in a gloss black finish, the Motion 4i is the ideal solution for those looking for high-quality sound in a space-saving design.

Purpose:
The Motion 4i is engineered for those seeking superior audio performance without the audiophile price tag. Whether for music or home theater systems, this speaker offers clear highs, full mids, and enhanced bass response.

Design:
The Motion 4i features the signature Folded Motion tweeter, delivering exceptional high-frequency detail with controlled dispersion and minimal distortion. Its 4-inch paper cone woofer delivers smooth midrange, while the Cascading Bass Reflex Port enhances low-frequency response. Designed with style in mind, the Motion 4i has a sleek, modern look with subtle curves and a gloss black finish. The perforated grille adds an elegant touch to the speaker’s understated design.

Key Features:
• Folded Motion Tweeter: The 1" x 1.4" Folded Motion Transducer features a large diaphragm that delivers fast, detailed highs with significantly reduced distortion.
• 4-inch Woofer: The paper cone woofer provides clear midrange and seamless integration with the tweeter.
• Cascading Bass Reflex Port: The rear-firing port improves low-frequency response and allows the speaker to produce surprisingly deep bass for its size.
• Vojtko Crossover: A custom-engineered crossover optimizes the performance of the drivers and ensures smooth transitions between frequencies.
• Flexible Installation Options: The Motion 4i can be placed on a tabletop or mounted on the wall, providing versatility for different setups.
• Push-Style Binding Posts: Banana jack-compatible push-style inputs ensure easy and secure connections.

Performance:
• Frequency Response: 70–23,000 Hz ±3dB, covering the full range of audible frequencies with clarity.
• Sensitivity: 90 dB/2.83V/m, providing dynamic sound even at lower volumes.
• Impedance: 4 Ohms, compatible with amplifiers rated at 4, 6, or 8 Ohms, offering flexibility for various setups.
• Crossover Frequency: 2,900 Hz, ensuring efficient frequency separation between the tweeter and woofer.

SPL and Amplification:
• Recommended Amplifier Power: 20—150 watts per channel, accommodating a wide range of amplifiers for various audio systems.
• Horizontal and Vertical Dispersion: 80° in both directions, ensuring consistent sound coverage across the room.

Dimensions and Installation:
• Dimensions: 12.6" x 5.6" x 5.7" (32 cm x 14.3 cm x 14.5 cm), compact and versatile for various speaker placements.
• Weight: 6 lbs. (2.72 kg), lightweight for easy installation and setup.

Finishes:
The Motion 4i is available in a high-gloss black finish, adding a sophisticated look that blends seamlessly with any home décor or AV equipment.