Description
MartinLogan Motion SLM XL – Ultra-Slim On-Wall Speaker
The MartinLogan Motion SLM XL is a premium ultra-slim loudspeaker designed to deliver exceptional sound quality alongside modern flat-panel televisions and within sophisticated home cinema systems.
With a depth of just 48mm including its wall-mounting bracket, the Motion SLM XL offers a discreet alternative to conventional loudspeakers without compromising on clarity, musical detail or dynamic performance.
Combining MartinLogan’s acclaimed Folded Motion tweeter with two 4-inch bass/midrange drivers and four passive bass radiators, the Motion SLM XL delivers detailed sound from an elegant, space-saving design.
Advanced Folded Motion Tweeter
The Motion SLM XL features MartinLogan’s Folded Motion transducer, engineered to deliver fast transient response, exceptional high-frequency detail and precise sound reproduction.
Its lightweight folded diaphragm helps reproduce subtle musical information with outstanding clarity, making the speaker particularly effective for dialogue, vocals and detailed musical recordings.
The tweeter provides controlled 80° horizontal and vertical dispersion, allowing flexible positioning in home cinema and stereo systems.
Dual 4-Inch Bass/Midrange Drivers
Two 4-inch paper-cone bass/midrange drivers provide natural vocal reproduction, controlled midrange performance and impressive dynamics for an ultra-slim enclosure.
Four additional 4-inch passive radiators help extend low-frequency performance without requiring a conventional bass-reflex port.
For deeper cinematic bass, the speaker can be combined with a suitable active subwoofer.
Ultra-Slim Design for Modern Televisions
The Motion SLM XL has been designed to complement large flat-panel televisions, particularly screens measuring approximately 65 inches and above.
Its slim profile allows it to sit close to the wall, creating an elegant and visually balanced installation.
The premium gloss-black finish and discreet magnetic grille complement contemporary interiors.
Flexible Vertical or Horizontal Installation
The Motion SLM XL can be positioned vertically or horizontally, making it suitable for:
- Front left and right home cinema speakers
- Centre-channel dialogue reproduction
- Premium stereo music systems
- Wall-mounted television installations
- Media walls and custom AV furniture
- Surround sound installations
The speaker includes mounting and support accessories for suitable wall-mounted or freestanding arrangements.
Premium Crossover Engineering
A carefully engineered two-way crossover integrates the Folded Motion tweeter with the bass/midrange drivers.
High-quality crossover components and integrated thermal/current protection contribute to consistent performance and reliable operation.
Key Features
- Ultra-slim premium on-wall loudspeaker
- MartinLogan Folded Motion tweeter
- Two 4-inch bass/midrange drivers
- Four 4-inch passive bass radiators
- Frequency response of 100Hz–25kHz
- 94dB sensitivity
- 4-ohm nominal impedance
- Recommended amplifier power of 20–140W
- 80° horizontal and vertical dispersion
- Suitable for vertical or horizontal placement
- Premium gloss-black cabinet
- Low-profile push-style speaker terminals
- Wall-mounting and placement accessories included
- Suitable for stereo and home cinema applications
Complete Technical Specifications
| Specification | Details |
|---|---|
| Manufacturer | MartinLogan |
| Model | Motion SLM XL |
| Product series | Motion |
| Speaker type | Two-way passive ultra-slim loudspeaker |
| Installation | On-wall, vertical or horizontal placement |
| Frequency response | 100Hz–25,000Hz (±3dB) |
| Horizontal dispersion | 80° |
| Vertical dispersion | 80° |
| Recommended amplifier power | 20–140W per channel |
| Maximum input power | 70W (manufacturer brochure rating) |
| Sensitivity | 94dB at 2.83V / 1m |
| Nominal impedance | 4 ohms |
| Amplifier compatibility | Manufacturer states compatibility with 4-, 6- and 8-ohm-rated amplifiers |
| Crossover frequency | 3,100Hz |
| Tweeter | 1 × Folded Motion transducer |
| Tweeter opening | 26 × 36mm |
| Tweeter diaphragm | 133 × 44mm |
| Bass/midrange drivers | 2 × 4-inch (102mm) paper-cone drivers |
| Passive radiators | 4 × 4-inch (102mm) paper-cone radiators |
| Cabinet construction | Sealed enclosure |
| Crossover components | Air-core inductors, polyester film and low-DF electrolytic capacitors |
| Protection | Thermal/current overload protection |
| Speaker connections | Low-profile push-style terminals |
| Finish | Gloss black |
| Wall-mount bracket | Included |
| Vertical table stand | Included |
| Horizontal support stands | Included |
| Optional accessory | Paintable white grille, sold separately |
| External amplification | Required |
Dimensions & Weight
| Measurement | Specification |
|---|---|
| Height | 867mm |
| Width | 162mm |
| Depth including wall bracket | 48mm |
| Overall dimensions (H × W × D) | 867 × 162 × 48mm |
| Net weight | 4.1kg per speaker |
Important Installation Information
The Motion SLM XL is a passive loudspeaker and requires connection to a compatible external amplifier or AV receiver.
Although MartinLogan specifies compatibility with suitable 4-, 6- and 8-ohm-rated amplification, the speaker has a nominal impedance of 4 ohms. Amplifier compatibility should therefore be checked before installation.
For wall-mounted installations, use appropriate fixings suitable for the wall construction and the weight of the speaker.
The 48mm published depth includes the wall-mount bracket.
For home cinema systems, pairing the Motion SLM XL with a compatible active subwoofer is recommended where extended low-frequency performance is required.
Ideal Applications
The MartinLogan Motion SLM XL is particularly suitable for:
- Luxury television installations
- Premium media walls
- Dedicated home cinema systems
- Left, centre and right speaker configurations
- High-quality stereo systems
- Contemporary living rooms
- Discreet residential AV installations
Expert MartinLogan Advice & Installation at Riverside HiFi
At Riverside HiFi, we specialise in premium loudspeakers, bespoke home cinema systems, media walls and integrated smart home entertainment.
Our services include:
- MartinLogan loudspeaker selection
- Stereo and home cinema system design
- Wall-mounted speaker installation
- Television and media wall integration
- AV receiver and amplifier matching
- Subwoofer integration
- Control4 smart home integration
- Professional system configuration and optimisation
Whether you’re creating an elegant living room entertainment system or a dedicated home cinema, Riverside HiFi can help you achieve exceptional sound with discreet, professionally installed equipment.
MartinLogan Motion SLM XL – Ultra-Slim On-Wall Speaker
Riverside HiFi – Hi-Fi | Home Cinema | Smart Home | Professional Installation
Ultra-Slim On-Wall Speaker
The slender Motion® SLM XL speakers features an advanced resolution Folded Motion tweeter, two 4-inch high-excursion fiber cone woofers and four passive bass radiators for maximum controlled low-end bass extension – all in an ultra-slim profile designed expressly for super-thin 65-inch or larger TVs.
Ultra-Slim Folded Motion® Speakers
The slender Motion SLM speakers feature an advanced resolution Folded Motion™ tweeter, two 4-inch high-excursion fiber cone woofers and two passive bass radiators for maximum controlled low-end bass extension – all in an ultra-slim profile designed expressly for super-thin TVs.
For even greater low-end bass extension, step up to the Motion SLM XL which adds two extra 4-inch passive radiators and aesthetically matches 65-inch and larger TV sizes.
Motion SLM X3’s 3-channel soundbar design gives you a complete stereo and center soundstage, with three Folded Motion tweeters and six 4-inch ultra-slim fiber cone woofers.
Inspired Sound
Inspired by MartinLogan’s ultra-high-end electrostatic loudspeakers, the Motion Series was created to provide stunning sound for your ultimate-performance home theater or stereo. MartinLogan’s dedicated in-house engineers carefully crafted the Motion Series to create an extremely affordable and compact product line that seamlessly blends our exquisite Folded Motion transducers with powerful, compact bass technology. The result is a smooth, refined sound with stunning dynamic range and jaw-dropping clarity.
The Audible Truth About Thin TVs
TV manufacturers are pushing the physical limits of electronics, making TVs that are thinner than ever at less than 2-inches from the wall. While they look great, creating a thinner television means making compromises to the built-in speakers; tiny drivers, cheaper parts, reduced cabinet volume and placement behind the TV create unnatural, lifeless sound. Worse yet, these speakers are usually underpowered, and easily distort when you turn up the volume. Motion SLM speakers provides a clean, easy to install solution for elevating the aural experience that has been sacrificed with ultra-thin TV technology
Slender Profile & Stunning Performance
The secret to the Motion SLM’s outstanding performance is the innovative dual 4-inch, ultra-slim fiber cone woofers and dual 4-inch high-velocity passive bass radiators, paired with a Folded Motion tweeter to create stunning acoustical alchemy typically found in much larger speaker systems. Hidden discretely underneath the grille, the drivers are held securely in place by a solid, black-anodized brushed aluminum baffle. The high-gloss black SLM cabinet is only 1.45-inches thin, for a total wall protrusion of 1.83-inches with magnetic grille and included wall mount bracket.
On-Wall or On-Shelf Versatility
With keyhole slots on the speaker’s back panel that attach easily to the included wall bracket, you’ll have the SLM wall-mounted and playing in no time. While we created Motion SLM speakers to wall mount next to ultra-flat panel TVs, that’s not their only application. Included* with each speaker is a curved black base to allow them to sit on a shelf or equipment cabinet (* SLM or SLM XL only).
The Perfect LCR System
Folded Motion tweeters have an 80° x 80° dispersion pattern, which allows SLM and SLM XL to sound exactly the same in a horizontal or vertical orientation, making them perfect for Left-Center-Right (LCR) system applications. The logo on the grille is magnetic and can move and rotate to the proper aesthetically pleasing location in any orientation. SLM and SLM XL both include a base designed for vertical applications, allowing the speakers sit on a shelf or equipment cabinet.
Specifications
Specifications are subject to change without notice
| Frequency Response | 100–25,000 Hz ±3dB |
| Recommended Amplifier Power | 20—140 watts per channel |
| Horizontal Dispersion | 80° |
| Vertical Dispersion | 80° |
| Sensitivity | 94 dB/2.83 volts/meter |
| Impedance | 4 Ohms Compatible with 4, 6, or 8 Ohm rated amplifiers. |
| Crossover Frequency | 3,100 Hz |
| High Frequency Transducer | 1″ × 1.4″ (2.6cm × 3.6cm) Folded Motion Transducer with 5.25″ × 1.75″ (13.3cm × 4.4cm) diaphragm |
| Low Frequency Transducer | Two 4” (10.2cm) paper cone. Four 4” (10.2cm) paper cone passive radiators. |
| Components | Custom air core coil inductors. Polyester film capacitors in series and low DF electrolytic capacitors in parallel. Overall system thermal/current protection. |
| Inputs | Low-profile push style |
| Weight | 9 lbs. (4.1 kg) |
| Dimensions | 34.1″ x 6.4″ x 1.89 ” (86.7cm x 16.2cm x 4.8cm) |
