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MartinLogan Motion® 4

Bookshelf speaker with wall mount bracket (Gloss Black)

13 Reviews | 4 questions - 17 answers

Item # 839MO4GB

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MartinLogan Motion® 4i



Our take on the MartinLogan Motion® 4

MartinLogan's Motion series speakers are known for sound that's realistic and immediate without being overbearing or harsh. The Motion 4 bookshelf speaker provides smooth, musical highs, clear mids, and surprisingly rich bass in a compact, elegant-looking package. Equipped with an included wall-mount bracket, this speaker works great in a wide range of applications. Use a pair for stereo music in rooms where you don't want to sacrifice floor space. Or use four of these satellites for your front and rear channels in a high-performance surround sound system.

MartinLogan Motion 4 in living room

Elegant looks, effortless detail

MartinLogan's Motion series speakers are known for sound that's realistic and immediate without being overbearing or harsh. The Motion 4 bookshelf speaker provides smooth, musical highs, clear mids, and surprisingly rich bass in a compact, elegant-looking package. Equipped with an included wall-mount bracket, this speaker works great in a wide range of applications. Use a pair for stereo music in rooms where you don't want to sacrifice floor space. Or use four of these satellites for your front and rear channels in a high-performance surround sound system.

Folded Motion™ tweeter for detailed sound

MartinLogan Motion 2 tweeter detail

The Motion 4 uses MartinLogan's acclaimed Folded Motion tweeter for smooth, effortless highs.

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 sounds amazingly detailed, but smooth and effortless, without a trace of harshness.

A stylish, curved cabinet with a unique folded port

MartinLogan Motion 4 internal view

Cutaway view of the folded bass port

The tweeter is coupled here with a 4" doped paper cone woofer that supplies accurate mids and lows. The Motion 4's eye-catching curved cabinet is finished in your choice of high-gloss white or piano black, and it hides a unique folded bass port that helps reinforce the low frequencies and improve sensitivity. This speaker's subtle, modern lines complement just about any décor. If you're mounting it high up on your wall, you can invert it to aim the high frequencies downward toward your listening position.

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.

Got wire?

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

Product Highlights:

  • elegantly curved cabinet with high-gloss black or white finish
  • 1" x 1.4" Folded Motion tweeter
  • 4" paper cone woofer with rigid dust cap
  • frequency response 70-25,000 Hz (±3dB)
  • handles up to 150 watts
  • sensitivity: 90 dB
  • impedance: 4 ohms
  • bass reflex cabinet with folded port for improved low-frequency extension
  • perforated metal grille
  • custom-designed push-style binding posts accept pins, banana connectors, or bare wire
  • includes wall mount bracket
  • 5-5/8"W x 12-5/8"H x 5-1/4"D
  • weight: 6 lbs.
  • warranty: 5 years (with product registration)
  • Our 60-day money-back guarantee

the highs are super crisp, the lows go all the way down to 60hz, really nice design and finish; included wall mounts are a plus, works very well with my onkyo receiver, wouldn't of gone with anything else!

Zachary, San Antonio, TX

What's in the Box:

  • Bookshelf loudspeaker
  • MartingLogan logo badge (installed)
  • Wall-bracket
  • Wall-bracket spacer
  • Two 1.5" screws
  • 2 Drywall anchors
  • 1/4"-20 Shoulder bolt
  • 4 Self-adhesive rubber pads
  • Cleaning cloth
  • User's Manual (En/Fr)
  • Installation template
  • Product Registration Card

MartinLogan Motion® 4 Reviews

Average Customer Review(s):

(13 Reviews)

Crisp and nice lows

Zachary from San Antonio, TX on 4/19/2017

Crutchfield Customer Review (What's this?)

the highs are super crisp, the lows go all the way down to 60hz, really nice design and finish; included wall mounts are a plus, works very well with my onkyo receiver, wouldn't of gone with anything else!

Pros: the highs are super crisp, the lows go all the way down to 60hz, really nice design and finish; included wall mounts are a plus, works very well with my onkyo receiver, wouldn't of gone with anything else!

Cons: none, besides the break in period of these speakers after a day or two of just listening to background music they broke in and the sound is amazing overall.

Splendiferous Sound

Chris from Santa Rosa,Ca on 4/5/2017

Crutchfield Customer Review (What's this?)

I'm using these for my front height speakers and they sound fantastic. Very revealing in sound with all the nuances I was looking for. Very pleased!!

Pros: Great speakers for the money

Cons: None

Great rear speakers

Ed from Kingwood Tx on 4/2/2017

Crutchfield Customer Review (What's this?)

Great rear speakers crisp and clear

Pros: Great sound

Cons: Difficult to mount on stand.

MartinLogan Motion® 4

Jason from Bainbridge wa on 3/26/2017

Crutchfield Customer Review (What's this?)

Great little speakers! I use them at front satellites to compliment the Martin Logan motion 60xt. They handle decent power for small speakers 150w @ 4ohms. Would like another set for rear sorounds.

Pros: Great sound. Good power handling. Crisp highs

Cons: I would like them to have regular binding posts for a solid spade connection

Awesome sound

Anonymous from Louisiana on 3/16/2017

Crutchfield Customer Review (What's this?)

Dramatic sound improvement with these speakers. Surprised at the full range of sound. Very happy.



Martin Logan Motion 4 Bookshelf Speakers

RichardGH from Asbury, NJ on 8/4/2016

Crutchfield Customer Review (What's this?)

Outstanding quality. Excellent treble / bass / depth. Could not be more pleased!



Took some time but was worth it.

Gordon from smithfield, VA on 3/4/2016

Crutchfield Customer Review (What's this?)

It took some time for me to get a good handle on these speakers. It definitely was not "Love at first sight", or more appropriately, first hearing. I could immediately tell a difference between these Martin Logan speakers and the ones they replaced, small Energy speakers; but, I couldn't decide if I liked the difference or not. The midrange was beautiful, clear and crisp without the harshness of the upper frequencies, but I was having some problems with the bass. It sounded sluggish and muddled below around 250 Hz. Fortunately, my Marantz receiver has a LF channel with variable cut offs and I use a powered sub-woofer so I was able to experiment with different cross-over points and volume levels on my sub-woofer. I wound up using the 120 Hz cut off on my Marantz and avery slight increase in my sub-woofer volume to achieve optimum balance. I now really enjoy the Martin Logans. The mids are clean and articulate, the bass is punchy without being bloated or lean, and the highs are nicely extended without being clashy or screatchy. One very notable improvement is dialogue from the TV. Now, I can understand what is being said, which was a problem with the Energys that I didn't even know I had until plugging the Martin Logans into my system. I'm finding that I'm using my AV system more for listening to music than previously because I'm enjoying it more. I would say that's a solid endorsement.

Pros: - wonderful midrange out of the box. - clear but relaxed upper range, well controlled. - very good balance.

Cons: - achieving balance requires some effort and equipment with the capability to apply appropriate cross-over points, and preferably a powered sub-woofer.

Significant Upgrade

MartinLogan Motion 4 from California on 8/10/2015

Crutchfield Customer Review (What's this?)

Upgrade from Infinity 1200 speakers, WOW! Quality speakers that all one needs to do is listen and remove all doubt. Very satisfied and excellent Crutchfield service.

Pros: Attractive and east to install.

Cons: None

Great looks and performance

J from Michigan on 6/22/2015

Crutchfield Customer Review (What's this?)

I wanted a speaker that would blend in with our white built in book shelves without sacrificing on quality. These speakers are nearly invisible, but when you do see them their modern styling is impressive. I mostly use them for background music, occasionally playing them at louder volumes. They perform perfectly no matter the style of music or volume level I have them set to. Would highly recommend!



New Martin Logan fan

Mnmacht from Minneapolis, MN on 2/7/2015

I am blown away by abilities of the Motion 4's. I paired them with a Martin Logan sub and I just smile while listening to music.

Pros: Really good at what they were designed for, highs and mids. Being part of a system rather than being the system.

Cons: Lower bass ranges are not there if your looking for an all in one speaker. But trust me, that can be solved with a quality sub for not much money.

Great Buy!

Jim from Great Bend, KS on 9/8/2014

Crutchfield Customer Review (What's this?)

Perfect size, excellent sound. Will buy 2 more for another room.

Pros: Smaller size and great sound quality, clear.

Cons: None

Concert in the family room

CalvinG from Delray Beach, Fl on 4/18/2014

Crutchfield Customer Review (What's this?)

Crystal clear, the tweeters are awesome. They are a great addition. I'm use them as my surround high speakers. Perfectly matched with my Motion 8 center , ESL fronts and dynamo 700W.

Pros: The tweeters, the tweeters, I think I already said that.


Oskar Heil, you were amazing

KentS from San Antonio, TX on 12/20/2013

Crutchfield Customer Review (What's this?)

These Martin Logan speakers rock! Using them in a 5.1 AV system. I am and have been a fan of this style tweeter since Oskar Heil invented the Air Motion Transformer in the early seventies. If you love crisp, clean high frequencies in your music, this is the speaker for you. Only issue is the lack of bass response and that is easily remedied with a quality subwoofer.

Pros: Crisp, clean highs. Compact size Quality of materials used.

Cons: Lack of bass response


Hands-on research

Features and Specs

Enclosure Bass Reflex
Video Shielded No
Tweeter Type Folded Motion Transducer
Tweeter Size (inches) 1 x 1.4
Midrange Size (inches) N/A
Woofer Size (inches) 4
Woofer Composition Paper
Woofer Surround Rubber
Power Range 20-150
Sensitivity 90 dB
Impedance (Ohms) 4
Frequency Response 70-25k Hz
Connector Type Spring post
Bi-amp Inputs No
Height (inches) 12-5/8
Width (inches) 5-5/8
Depth (inches) 5-1/4
Weight (pounds) 6
Mounting Bracket Included Yes
Recommended Stand Height (inches) 26-31
Parts Warranty 5 Yrs w/ Registration
Labor Warranty 5 Yrs w/ Registration

Product Research


Folded Motion Tweeter: MartinLogan's Folded Motion Tweeter helps give the Motion 4 bookshelf 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 to create a realistic and carefully etched sound stage.

4" Paper Cone Woofer: The MartinLogan Motion 4 loudspeaker features a 4" paper cone woofer with a stamped steel basket housed in a non-resonant asymmetrical chamber. The paper cone woofer uses a rigid structured dust cap to reduce cone break-up and distortion. This 4" cone woofer provides rich, detailed midbass.

Precision Crossover: To seamlessly blend the audio output from the high frequency driver (tweeter) and the midbass driver (woofer), the Motion 4 loudspeaker features a precision 2900Hz crossover utilizing custom air core coil and low DCR steel laminate inductors, polyester film capacitors in series, and low DF electrolytic capacitors in parallel.

Folded Reflex Port Technology: MartinLogan engineers were faced with a daunting task, create a compact speaker with low-end bass reproduction found in speakers much larger. After a myriad of prototypes, they created the Folded Motion Cascading Bass Port. This brilliant solution allows a long tuned port, which is folded over itself (think of a trombone's tuning arm) to be compacted and squeezed into the Motion 4 bookshelf loudspeaker. The result is amazingly detailed low bass that can play at high volumes with minimum distortion; all thanks to the elegantly simple cascading fold that slows down and controls the air motion of the bass waves. The Folded Motion Cascading Bass Port exits the rear-panel of the speaker cabinet.

Curved High-Gloss Black Cabinet: Complementing the Motion 4 loudspeaker's sonic accuracy is its elegant, yet understated styling. A high-gloss, piano black finish and subtle curves, along with MartinLogan's signature perforated grille, give the Motion 4 speaker an elegant and timeless look that will blend into almost any decor.

Spring-Post Connectors: The MartinLogan Motion 4 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.

Versatile Mounting Options: The MartinLogan Motion 4 bookshelf loudspeaker can simply be placed on a table-top, stand, shelf, or other flat surface. Four self-adhesive rubber feet are included for safe and secure placement. Using the included keyhole-slot bracket, you can wall-mount the speaker at two different angles. This means you can point sound directly toward the desired listening area for high or low wall mounting applications. In addition the Motion 4 is fitted with a 1/4"-20 threaded insert which allows you to hang the speaker on the wall using optional articulating wall-mount brackets (sold separately).

  • If the Motion 4 is being mounted at approximately ear-level, the speaker should be oriented with the tweeter at the top. This will disperse sound directly towards the desired listening area.
  • If the Motion 4 is be mounted above ear-level, the speaker should be oriented with the tweeter at the bottom. This will disperse the sound down at a 20° angle towards the listening area.
Note: The MartinLogan logo badge on the Motion 4's grille can be re-position based on how you have the speaker mounted.

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.

Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

Rear speakers [ Glen  Mar 26, 2017 ]
It matches my Motion 8 center speaker, and they will replace ceiling speakers that fail to direct the sound to the listener despite the tweeter being tilted. The price is also accessible, and I can painlessly upgrade to larger Martin Logan speakers if the Motion 4's solve my 5.1 channel audio issue. [ jose  Feb 27, 2017 ]
I think they sound great and will make good surround speakers since they will match the Martin Logan SLM XL LCR speakers I am using. [ Terry  Aug 15, 2016 ]
Martin Logan - always excellent quality, and, serves the purpose for my home office [ Richard  Jul 22, 2016 ]
GREAT EQUIPMENT [ Edward  Jan 05, 2016 ]
Listened to them and they sounded amazing. Reviews are really good too. [ Keith  Dec 27, 2015 ]
Best sound I have heard [ Gary  Apr 16, 2016 ]
Reputation. [ Gordon  Feb 07, 2016 ]

4 questions already asked

The motion 4's would make great L/R speakers. I have the motion 8 and that combination is awesome. [ Johann  Jun 15, 2017 ]
I use them for front right and left high speakers in addition to the Martin Logan 60xt towers with a motion 8 center. I am considering buying another set for rear surrounds. Great speakers for the price [ JASON  Jun 15, 2017 ]
It all depends on your room size. I have 16X14 room with Motion 4 as main, motion 2 in rear and ceiling, Motion 8 as center. It sounds awesome!!!!! [ Enrique  Jun 14, 2017 ]
thats what i am currently running right now i have these as my mains l/r and the motion 8 as my center, it sounds great but yea probably better for rears but if you do set it up like i have it make sure you get a subwoofer, my set up sounds perfect IMO [ Zachary  Jun 14, 2017 ]
Due to their frequency response of 70 hz for lows you would need a sub. I have 7.3 setup all motion 4s & motion 8 center, & l'm very happy with them. [ ERIK  Jun 14, 2017 ]
I think they are great little speakers. I have my paired with ML 35xt fronts and ML50xt center. Dual Svs pb2000 subs they hold their own. Would buy again and recommend. [ Glen  Apr 06, 2017 ]
I don't know l these speakers and Polkaudio subwoofer which sounds great. Sorry I'm not more helpful. [ PAUL  Apr 06, 2017 ]
That's a great idea. I'm using these as surrounds and they sound amazing. [ Johann  Apr 06, 2017 ]
It is a great idea. No matter where you install these speakers they sound great. Highly recommended! [ ERIK  Apr 05, 2017 ]
Hello My speakers came with wall brackets that make it possible to swivel the speaker in any direction but really do not allow any tilt. By swivel I mean the length of the speaker could be at a 45 degree angle but parallel to the wall plane. [ PAUL  Mar 03, 2017 ]
I used PinPoint AM21 wall mounts. Have only had them installed for ~2 weeks and so far they work fine so far. [ Marcus  Mar 02, 2017 ]
I went with an Onkyo 828 because they were rated to handle 4 olm speakers. You have to look hard to find them. The newer Denon receivers are rated but more money. Good luck. [ Daniel J.  Aug 12, 2015 ]
I am using an Onkyo tx-nr626 av receiver [ KENT  Aug 10, 2015 ]
I use an Onkyo 100 watts per channel receiver (more than I need). I am running 7.1, 4 motion 4, center and two ML towers. [ F Hobbs  Aug 10, 2015 ]
I bought a Denon AVR 2100 with a Martin Logan 10" sub. Sounds great! [ Jon  Aug 10, 2015 ]
Hello Donn, I bought a Onkyo TX-NR636 7.2-channel home theater receiver with Wi-Fi®, Bluetooth®, and Dolby Atmos Item #: 580TXN636 for my Motion 4's and MartinLogan Motion SLM Hi-Performance Flat Panel LCR Speaker. Have had it around a month, seems to be a great receiver at a good price and the power is ranged for your motion 4's., Another plus is Martin Logan recommends running these speakers @ 4 ohms this receiver auto adjust for this. Hope this Helps Best Regards Rob E [ Robert  Aug 10, 2015 ]
I have a Sony, very satisfied with it. [ George  Aug 10, 2015 ]