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MartinLogan ElectroMotion® IW

In-wall speaker

Item # 839EMIW

California customers:
Please click here for your Proposition 65 warning.

Item # 839EMIW

Ships free today

In stock
$599.99 each

Other options

About the MartinLogan ElectroMotion® IW

A hidden gem

You may not notice it when you first walk in the room, but as soon as the ElectroMotion IW starts playing you'll never forget its sound. This stealthy MartinLogan in-wall speaker delivers a memorable listening experience practically anywhere in your home, yet its ultra-low profile vanishes neatly into your room's decor without taking up a bit of valuable floor space. Install a pair of these speakers in a kitchen or bedroom for fantastic stereo sound, or use multiple pairs to create a concealed home theater system.

MartinLogan EM IW in-wall speaker

Folded Motion™ tweeter for detailed sound

The distinctive sound of the ElectroMotion IW starts with MartinLogan's Folded Motion tweeter. Rather than a dome or cone driver, this tweeter uses a pleated diaphragm that works like an accordion by "squeezing" air to create sound. It requires about 90% less excursion than a typical 1" dome tweeter, resulting in quicker response time and much lower distortion. The tweeter's controlled sound dispersion creates a focused soundstage with a real sense of presence. Music and movie soundtracks sound amazingly detailed, but smooth and effortless, without a trace of harshness.

Bass that keeps pace

The speaker's tight, responsive bass and dynamic midrange come courtesy of a 6-1/2" aluminum cone woofer. Mounted in a rigid, cast-aluminum basket to minimize unwanted resonance, the woofer supplies fast, clean sound that blends seamlessly with the Folded Motion tweeter. A hand-built, audiophile-grade crossover further ensures precise driver integration for high-accuracy sound.

Installer-friendy design

The ElectroMotion IW's robust mounting-lock system allows quick, trouble-free installation, providing firm coupling of the speaker's chassis to the wall. And this speaker is practically invisible thanks to an ultra-low profile, micro-perforated grille and hidden bezel. Magnets hold the grille in place, reducing the risk of warping or damage during installation.

Got wire?

Most speakers don't include any. Learn more about in-wall wiring at the Crutchfield Learning Center.
Shop our selection of in-wall speaker wire.

Product highlights:

  • 1" x 1.4" Folded Motion tweeter for exceptional detail with low distortion
  • 6-1/2" aluminum cone woofer with cast aluminum basket
  • frequency response: 47-25,000 Hz (±3dB)
  • recommended amplifier power: 20-200 watts
  • sensitivity: 90 dB
  • impedance: 4 ohms
  • hand-built, audiophile-grade crossover network
  • paintable speaker grille
  • frame dimensions: 8-1/2"W x 11"H
  • cutout dimensions: 7-7/8"W x 10-1/4"H
  • mounting depth: 3-13/16"
  • warranty: 5 years (with product registration)
  • Our 60-day money-back guarantee
  • MFR # EMIW

What's in the box:

  • In-wall speaker
  • Grille
  • Paint cover
  • User's Manual (En/Fr)
  • Installation template
  • Product Registration Card

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More details on the MartinLogan ElectroMotion® IW

Stacey B.

Features & specs

Quantity in Package Single
Tweeter Folded Motion Ribbon
Aimable Tweeter No
Woofer Composition Aluminum
Woofer Surround Rubber
Moisture-resistant No
Connector Type Spring post
Bi-Amp Inputs No
Built-in Back-box No
Tweeter Size 1 x 1.4
Midrange Size N/A
Woofer Size 6.5
Speaker Shape Rectangular
Cutout Width 7.875
Cutout Height 10.25
Power Range (Watts) 20-200
Sensitivity 90 dB
Impedance (Ohms) 4
Frequency Response 47-25kHz
Parts Warranty 5 Yrs w/ Registration
Labor Warranty 5 Yrs w/ Registration

Product Research


In-Wall Loudspeaker: The ElectroMotion IW in-wall loudspeaker features MartinLogan's Folded Motion tweeter and a 6.5" aluminum cone woofer with cast aluminum basket that provides powerful low-frequency bass extension. This stealthy in-wall speaker blends seamlessly into any home thanks to it's ultra-low profile, micro-perforated grille with no visible bezel.

Folded Motion Tweeter: MartinLogan's Folded Motion tweeter helps give the ElectroMotion IW in-wall speaker its natural, realistic high frequency sound. Lightning fast transient response, combined with a large surface area (8x that of a typical 1" dome tweeter) creates clear, dynamic, and precise sound. The 1" x 1.4" Folded Motion tweeter works by moving air (which creates sound) perpendicular to the folded ridges of the diaphragm, similar to how an accordion works. This extremely low mass diaphragm "squeezes" air and requires almost 90% less excursion than the typical 1" dome tweeter, which drastically minimizes distortion while providing a lightning fast response time. The increased surface area also provides a wide, yet controlled sound dispersion (80°x80°) to create a realistic and carefully etched sound stage.

Aluminum Cone Woofer: The ElectroMotion IW in-wall speaker employs a 6.5" aluminum cone woofer with a rubber surround, concave dust cap, and cast aluminum basket for detailed midrange and powerful low-frequency bass extension.

Precision Vojtko Crossover: Carefully hand-built using only the finest polyester capacitors and air-core coils, the crossover employ's MartinLogan's proprietary Vojtko topology for vanishingly low distortion and seamless driver integration. This precision-tuned network preserves even the most microscopic sonic nuances while handling the full dynamics of any source.

Spring-Post Connectors: The MartinLogan ElectroMotion IW features two spring-post connectors to attach your speaker wire. The spring-posts will accept bare wire (16- to 12-gauge) and pin-connectors.

Robust Mounting Locks: A robust mounting-lock system allows quick, trouble-free installation. When not in use, the constant-control mounting locks are held securely within a self-contained housing. When moved into place during installation, they couple the speaker's chassis firmly to the wall. And if the speaker is ever removed, the locks retract and latch themselves back in their housings.

Ultra-Low Profile Grille: The MartinLogan EM-IW features an ultra-low profile, paintable micro-perforated grille with no visible bezel for a near invisible integration into any wall. A magnetic system secures the grille easily into place, reducing the risk of warping or damage during installation.

Applications & Placement: The EM-IW is suitable for almost any application in average to small rooms. Ideal for use in a multi-channel home theater as a surround speaker, in a kitchen as 2-channel stereo speaker, or in a hallway as part of a distributed audio system. This MartinLogan in-wall speaker offers superb imaging and flexible placement in nearly any location. However, for best performance and imaging place speakers equidistant from one another and avoid physical obstructions between the speaker and primary listening position.

Installation Dimensions: The in-wall speaker has an overall measurement of 8.5" (w) x 11" (h) x 3.9375" (d). It requires a cut-out of 7.875" (w) x 10.25" (h) and a mounting depth of 3.8125" behind the wall surface. The speaker only protrudes 0.125" from the wall.

Break-in Period: Allow approximately 72 hours of break-in at 90 dB (moderate listening levels) before any critical listening.

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Customer Q&A

2 questions already asked

If you use this as a left and right front, what model(s) would you use for a center channel speaker in wall, and/or on wall? Thanks
[ sam  Dec 09, 2020 ]
1 answer
There are different models for all those options even including using an other one of these as a center channel speaker. I recommend contacting an advisor by calling 1-800-324-9695 to discuss your setup and goals to get a personal recommendation on the center channel to use
[ Paul  Dec 22, 2020 ]  Staff
Are these MartinLogan Electromotion IWs suitable for use in a 3.1 set up as the front R and L speakers?
[ Gabriel  Dec 28, 2017 ]
1 answer
Sure! If you pair the ElectroMotion IW with a center speaker they would work nicely as the front L & R speakers in a 3.1 system. For more details or to discuss further, please contact an Advisor directly by phone (888.955.6000) or online chat. Thanks!
[ Larry  Jan 02, 2018 ]  Staff

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$1,299.99 each
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Experience audiophile-quality in-wall sound

The MartinLogan Axis offers these features:
  • MartinLogan's larger Folded Motion XT tweeter for increased bandwidth and efficiency
  • dual 5-1/4" drivers for powerful, articulate bass
  • a solid die-cast aluminum housing and thick MDF baffle to resist vibration and warping