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MartinLogan Motion® 8

Center channel/multi-purpose home theater speaker

20 Reviews | 2 questions - 9 answers

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Item # 839MO8B

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Our take on the MartinLogan Motion® 8

MartinLogan's elegant Motion 8 was designed for maximum performance and flexibility. This versatile speaker comes with brackets for easy wall-mounting. And because you can orient it horizontally or vertically, it makes a great center channel companion to other wall-mountable members of the Motion series, such as the Motion 2 or Motion 4. You can also use a trio of these speakers across your front left, center, and right channels for a seamless front soundstage.

Dynamic home theater performance from MartinLogan

MartinLogan Motion 2 tweeter detail

The Motion 8 uses MartinLogan's acclaimed Folded Motion tweeter for smooth, effortless highs.

MartinLogan's elegant Motion 8 was designed for maximum performance and flexibility. This versatile speaker comes with brackets for easy wall-mounting. And because you can orient it horizontally or vertically, it makes a great center channel companion to other wall-mountable members of the Motion series, such as the Motion 2 or Motion 4. You can also use a trio of these speakers across your front left, center, and right channels for a seamless front soundstage.

Folded Motion™ tweeter for detailed sound

The distinctive sound of the Motion series 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.

A stylish, curved cabinet

MartinLogan Motion 8 in living room environment

The Motion 8, shown here as a wall-mounted center channel speaker

The tweeter is flanked by two 4" doped paper cone woofers that supply accurate mids and bass. All three drivers are mounted in an eye-catching curved cabinet that's finished in classic high-gloss piano black. The Motion 8's subtle, modern lines complement just about any décor.

Be sure you get enough bass

For even better bass — and especially for high-impact home theater — we recommend a powered subwoofer, like one of MartinLogan's excellent models.

Product Highlights:

  • versatile home theater speaker can be positioned horizontally or vertically
  • includes brackets for wall mounting
  • elegantly curved cabinet with high-gloss piano black finish
  • 1" x 1.4" Folded Motion tweeter
  • two 4" doped paper cone woofers with rigid dust caps
  • frequency response 70-25,000 Hz (±3dB)
  • handles up to 180 watts
  • sensitivity: 89 dB
  • impedance: 4 ohms
  • acoustic suspension (sealed) cabinet
  • perforated metal grille
  • custom-designed push-style binding posts accept pins, banana connectors, or bare wire
  • 22-1/4"W x 5-5/8"H x 5-1/4"D
  • weight: 8.5 lbs.
  • warranty: 5 years (with product registration)
  • Our 60-day money-back guarantee

What's in the Box:

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

Great speaker at a great price. I have it paired with Martin Logan Motion LX LR speakers. A much better upgrade from the Motion 6.

Raj, San Diego, CA


MartinLogan Motion® 8 Reviews

Average Customer Review(s):

(20 Reviews)
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Hands-on research

Features and Specs

Enclosure Acoustic Suspension
Tweeter Folded Motion Transducer
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 70-25k Hz
Height (inches) 5-5/8
Width (inches) 22-1/4
Depth (inches) 5-1/4
Weight 8.5 lbs
Parts Warranty 5 Yrs w/ Registration
Labor Warranty 5 Yrs w/ Registration

Product Research


2-Way LCR Speaker: The MartinLogan Motion 8 LCR loudspeaker employs a 2-way speaker design and features MartinLogan's advanced resolution Folded Motion tweeter and two 4" paper cone woofers. Pairing these three drivers together creates a dynamic full-range sound with an expansive soundstage.

  • Folded Motion Tweeter: MartinLogan's Folded Motion tweeter helps give the Motion 8 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 Paper Cone Woofers: The Folded Motion tweeter is flanked by two 4" paper 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" paper 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 Motion 8 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 Motion 8 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 Motion 8 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.

Spring-Post Connectors: The MartinLogan Motion 8 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). The rubber caps on the spring-post connectors must be removed to use banana plugs.

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

Mounting Options: The MartinLogan Motion 8 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.

Note: The MartinLogan logo badge on the Motion 8's grille can be re-position based on how you have the speaker mounted.

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

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Staff Reviews

Product reviews from the Crutchfield Labs

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Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

I own Motion 40s and LX-16s and love the sound. [ MICHAEL  Sep 11, 2018 ]
By comparison, the motion 8 was a clear choice. [ Saul  Aug 14, 2018 ]
Great Speaker at a great price [ BRETT  Feb 28, 2018 ]
To complement my Motion20 Tower speakers in 3.1 setup [ Rik  Dec 28, 2017 ]
Great sounding and aesthetically pleasing center channel speaker. [ John  Dec 28, 2017 ]
I love the MartinLogan Motion series. The Motion 8 was perfect for the room/ setup it will be in. [ Randy  Dec 18, 2017 ]
Was actually looking at the Motion 30 and the advisor evaluated my system and use and said the 8 would work well for me. I went with his recommendation and if I am not pleased, I will use the 60 day return policy [ Jim  Nov 27, 2017 ]
Match for other speakers [ ARTHUR  Nov 11, 2017 ]
have other Martin Logan products, this is next step to having all Martin Logan products. [ Peter  Mar 17, 2017 ]
Adding to a system with other MartinLogan speakers. Very pleased with MartinLogan. [ Edward  Apr 16, 2016 ]
Best sound ever. Very satisfied with a pair of motion 15 Martin Logan book-shelf. [ Emmanuel  Mar 13, 2016 ]

2 questions already asked

I believe that would depend on the sound level adjustments you have in your receiver. The MartinLogan is quite powerful as I needed to turn it down to balance my 7.1 system. Overall, I would say no problem [ Michael  Mar 12, 2018 ]
Yes [ JOSEPH E  Mar 12, 2018 ]
Thought I'd add to many of these answers are just flat out wrong! Martin Logan's literature says this regarding design... "Application: Stereo speaker or home theater center/front/surround ideal for large, medium, and small rooms." I use a pair of these with an in-wall subwoofer and they sound and look great! Use a receiver with the ability to simulate/phantom center channel and you'll probably be happy. They roll off -3dB below 70Hz...thus the reason for having a sub. Regarding mounting, they come with hardware and instructions for both horizontal and vertical mounting and the logo is removable and repositionable depending upon your choice. Both of mine came with the logos on the bottom short edge set up for vertical mounting. [ tdr21  Nov 24, 2015 ]
Roby, Depending on the size of your room, the MartinLogan Motion 8's would work fine as front-main speakers, as long as you combine this set-up with a subwoofer. These Motion 8's have incredible high and mid-end clarity at all volumes because of the combination of the folded motion tweeter and 2 woofers but I think you'd be lacking in fuller bass without a sub. I run my Motion 8 center-channel speaker with 2 MartinLogan ESL's for front-main speakers, 4 x MartinLogan Motion 4's as Surround and Surround-Back speakers, and the MartinLogan Dynamo 700W as my subwoofer, (with a JBL as a second subwoofer.) [ Douglas  Dec 03, 2014 ]
I doubt it would sound very good as main front speakers but it would work. [ Michael  Dec 03, 2014 ]
I don't see why not. If you are planning to have them vertical, they would have to be mounted because the sides are angled. [ David  Dec 03, 2014 ]
Don't know. It is designed as a center. Doesn't have any bass making ability to speak of. [ CHARLES  Dec 03, 2014 ]
i'm guessing it would work, but it's not a good choice. The Motion 8 is a great speaker and I love it as a center speaker. But, as a front it'll be lacking in the low area(bass) and I wonder if it's too directional and would throw a small sound stage. I have Martin Logan Theos as my front mains. [ CALVIN L.  Dec 03, 2014 ]
I can assume that you would need two to create the stereo effect. This is not a dual channel speaker that I am aware of. [ Gordon F.  Dec 03, 2014 ]