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MartinLogan Motion® 8i

Center channel/multi-purpose home theater speaker with wall-mount brackets

Item # 839MO8IB

Have a vivid big-screen TV mounted to the wall in your home theater space? MartinLogan's Motion® 8i...

Have a vivid big-screen TV mounted to the wall in your home theater space? MartinLogan's Motion® 8i...

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

Item # 839MO8IB

In stock
$449.99 each

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About the MartinLogan Motion® 8i

Kramer Crane

Huge sound from a wall-mountable speaker

Have a vivid big-screen TV mounted to the wall in your home theater space? MartinLogan's Motion® 8i can help you get matching lifelike sound that pulls you into the action. This "LCR" speaker can be used as a left-, right-, or center-channel speaker in your surround sound system, all without taking up any floor space in your room. 

Huge sound from a wall-mountable speaker

Have a vivid big-screen TV mounted to the wall in your home theater space? MartinLogan's Motion® 8i can help you get matching lifelike sound that pulls you into the action. This "LCR" speaker can be used as a left-, right-, or center-channel speaker in your surround sound system, all without taking up any floor space in your room. 

MartinLogan Motion® 8i Center channel/multi-purpose home theater speaker

The Motion 8i uses a Folded Motion tweeter and two 4" woofers for huge sound from a slim cabinet.

An acclaimed tweeter delivers smooth, sweet highs

One of the reasons the Motion 8i sounds so good is its Folded Motion® tweeter. This unique, accordion-style design is quick, accurate, and very smooth. You'll enjoy clear, natural sound throughout its frequency range. A pair of 4" woofers flank the tweeter and deliver punchy midrange and bass.

Mount it vertically or horizontally

You can mount the Motion 8i vertically to the left or right side of your wall-mounted TV. Or install it horizontally under your TV as a center channel. It even includes the wall-mount brackets, so you won't have to buy them separately.

A heads-up on impedance

The Motion 8i is rated at 4 ohms. You'll want to make sure that every channel of your home theater receiver that's driving one is 4-ohm stable. Give one of our friendly Advisors a call if you have questions about this, or need help matching this speaker up with a receiver.

Part of a complete MartinLogan surround sound system

The MartinLogan Motion Series features an array of speakers that are voice-matched for compatibility in an immersive surround sound system:

Got wire?

Most speakers don't include any. Read our article about choosing and installing speaker wire.
Shop our selection of speaker wire.

READ LESS

Product highlights:

  • elegantly curved cabinet with high-gloss piano black finish
  • speaker can be mounted horizontally or vertically
  • 1" x 1.4" Folded Motion tweeter
  • two 4" poly cone woofers with rigid dust caps
  • frequency response: 70-23,000 Hz (±3dB)
  • recommended amplifier power: 20-180 watts
  • sensitivity: 89 dB
  • impedance: 4 ohms
  • acoustic suspension (sealed) enclosure
  • perforated metal grille
  • custom-designed push-style binding posts accept pins, banana connectors, or bare wire
  • includes two wall-mount brackets
  • 22-1/8"W x 5-9/16"H x 5-1/4"D
  • weight: 8.5 lbs.
  • warranty: 5 years (with product registration)
  • Our 60-day money-back guarantee
  • MFR # Motion 8i

What's in the box:

  • LCR loudspeaker
  • Grille
  • 2 Wall-bracket
  • 2 Shoulder bolts
  • 4 Rubber bumpers
  • Cleaning cloth
  • User's Manual (En/Fr)
  • Installation template
  • Product Registration Card

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MartinLogan Motion® 8i reviews

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This review was collected as part of a promotion

Pros:

Cons:

Crutchfield response

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More details on the MartinLogan Motion® 8i

Stacey B.

Features & specs

Enclosure Passive Radiator
Color Gloss Black
Tweeter Type Folded Motion Ribbon
Tweeter Size (inches) 1.0 x 1.4
Midrange size (inches) N/A
Woofer size (inches) 4
Connector Type Spring post
Power Range 20-180
Sensitivity 89 dB
Impedance (Ohms) 4
Frequency Response 70.23k Hz
Height (inches) 5-9/16
Width (inches) 22-1/8
Depth (inches) 5-1/4
Weight 8.5 lbs
Wall-mountable Yes
Bracket Included Fixed bracket
Parts Warranty 5 Yrs w/ Registration
Labor Warranty 5 Yrs w/ Registration
The MartinLogan Motion® 8i replaces these items:

Product Research

Features

Folded Motion Tweeter: MartinLogan's Folded Motion tweeter helps give the 8i LCR loudspeaker 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.

Dual Poly Cone Woofers: The Folded Motion tweeter is flanked by two 4" poly cone woofers with a stamped steel basket housed in a non-resonant asymmetrical chamber. The paper cone woofers use a rigid structured dust cap and butyl rubber surround to reduce cone break-up and distortion. These two 4" cone woofers provide rich, detailed midrange/midbass.

Precision Vojtko Crossover: To seamlessly blend the audio output from the Folded Motion tweeter and two 3.5" woofers, the 8i loudspeaker features a precision Vojtko crossover (3000Hz) utilizing custom air core coil and low DCR steel laminate inductors, polyester film capacitors in series, and low DF electrolytic capacitors in parallel.

Curved High-Gloss Black Sealed Cabinet: Complementing the 8i loudspeaker's sonic accuracy is its elegant, yet understated styling. A high-gloss piano black finish, along with MartinLogan's signature perforated grille, give the 8i speaker an elegant and timeless look that will blend into almost any decor. The speaker cabinet also features rounded edges and gently tapered top/sides. The cabinet is an acoustic suspension design (sealed) for tighter, accurate midbass. The grille is magnetic and detachable.

Spring-Post Connectors: The MartinLogan 8i speaker features two spring-post connectors to attach your speaker wire. The spring-posts will accept bare wire (16- to 10-gauge), pin-connectors, and banana plugs (single only).

Applications: The MartinLogan 8i LCR loudspeaker can be used as a center-channel speaker or paired with another 8i speaker for a stereo or home theater front/rear application.

Mounting Options: The MartinLogan 8i speaker can simply be placed horizontally on a flat-surface; such as a table-top, stand, shelf, or cabinet. Four rubber self-adhesive feet are included to prevent slippage and reduce vibration. Because of its curved cabinet, this speaker cannot be placed vertically on a flat-surface. The included wall-mount brackets and hardware let you mount this LCR speaker on the wall, horizontally or vertically.

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Customer Q&A

2 questions already asked

Q
I have a small room that l have dedicated as my entertainment room. Itâ??s lacking a center speaker. My front and rear are MartinLogan cherrywood finished speakers. I would like a MartinLogan center speaker the same. Cost is a factor. What can you recommend?
[ EDGAR  Dec 08, 2020 ]
2 answers
A
I bought this for a neighbor to complete their MartinLogan system. they love it. Good sound and a reasonably small profile. It is also reasonably priced. For the money, a very good speaker.
[ JOSEPH  Dec 11, 2020 ]
A
I use a MartinLogan 8i center speaker in my bedroom which is approximately 20ft by 20ft. I also use MartinLogans for the front L and R speakers. I also have a MatinLogan woofer. I thought of building a surround system which I am normally used too (Had one at our cabin for years). However, I love the quality of sound reproduction I get from my bedroom system so much I decided that any further sound improvement would be so minuscule it would not be worth the cost! I hope my response helps answer your question.
[ GREGG 9  Dec 11, 2020 ]
Q
Can this 8i be used as a surround speaker?
[ CHRISTOPHER  Nov 30, 2018 ]
1 answer
A
It sure can be used as a surround speaker! My Bio: https://www.crutchfield.com/bio/Paul
[ JASON  Dec 10, 2018 ]  Staff

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