MartinLogan MOTSLM Motion SLM Hi-Performance Flat Panel LCR Speaker - Gloss Black - Each

Flat-screen TV setups get a slim left, center or right speaker from the MartinLogan Motion SLM (MOTSLM), an ultra-slim on-wall speaker in gloss black.

A Folded Motion tweeter with 80 by 80 degree dispersion sits with two 4 in woofers and two 4 in passive radiators, so it sounds the same mounted horizontally or vertically, and it is under 2 inches deep on the wall bracket.

Key Features

• Folded Motion tweeter: 1 x 1.4 in transducer, 80 x 80 degree dispersion
• Dual 4 in woofers: Plus two 4 in passive radiators
• Frequency response: 110 – 22,000 Hz (+/-3 dB)
• Sensitivity: 94 dB (2.83 V / 1 m)
• Amplifier range: 20 – 140 watts
• Orientation: Horizontal or vertical, on-wall or off-wall
• Included hardware: Wall bracket, vertical table stand, horizontal stands
• Finish: Gloss black, sealed cabinet

Ideal For

• TV setups: slim LCR
• Home theater: on-wall placement
• Condos and apartments: under-2 in depth

MartinLogan Motion SLM Ultra-Slim LCR Speaker, Folded Motion Tweeter, Dual 4 in Woofers, Gloss Black Specifications

MartinLogan Motion SLM technical specifications, grouped by feature

Specification	Details
Acoustic Performance
Frequency Response (+/-3 DB)	110 – 22,000 Hz
Dispersion	80 x 80 degrees
Sensitivity	94 dB at 2.83 V / 1 m
Impedance	4 ohms; compatible with 4, 6 or 8 ohm amplifiers
Crossover Frequency	2,600 Hz
High-Frequency Driver	1 x 1.4 in Folded Motion transducer
Low-Frequency Drivers	Two 4 in paper cones; two 4 in passive radiators
Amplification & Power Handling
Recommended Amplifier Power	20 – 140 watts
Connectivity
Maximum Input Power	70 watts
Physical & Mounting
Weight	6.5 lb (3 kg) each
Additional Features
Cabinet	Sealed
Binding Posts	Push style
Finish	Gloss black
Size (H x W x D)	25.3 x 6.4 x 1.83 in (64.2 x 16.2 x 4.75 cm)
General
Brand	MartinLogan
Model	Motion SLM
Manufacturer Part Number	MOTSLM

Specifications are verified against the MartinLogan manufacturer data sheet (October 2026) and may change without notice. Confirm critical requirements with MartinLogan before ordering.

What’s in the Box

• Wall mount bracket
• Vertical table stand
• Horizontal stands

Warranty & Support

Planning a multi-room or multi-site install? Request a quote from Robertson AV for 5 or more units, or call us at 800-919-6548 or email orders@robertsonav.com. Free ground shipping on U.S. orders. Schools, businesses, government agencies and houses of worship: ask us about project and quantity pricing.

Paintable white grille cover is sold separately.