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MartinLogan Dynamo™ 700W

Wireless powered subwoofer

13 Reviews | 3 questions - 12 answers

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Our take on the MartinLogan Dynamo™ 700W

Ever have trouble finding the perfect spot for your sub? Well, with MartinLogan's Dynamo 700W subwoofer, you'll have lots of options. This versatile sub's standard down-firing setup is perfect for placing it in corners or along side walls. But if you're looking for a more discreet placement such as in a cabinet with your other home theater gear, you can easily convert it into a front-firing sub by simply removing and reorienting its detachable feet.

A sub that fits where you want it

Ever have trouble finding the perfect spot for your sub? Well, with MartinLogan's Dynamo 700W subwoofer, you'll have lots of options. This versatile sub's standard down-firing setup is perfect for placing it in corners or along side walls. But if you're looking for a more discreet placement such as in a cabinet with your other home theater gear, you can easily convert it into a front-firing sub by simply removing and reorienting its detachable feet.

MartinLogan Dynamo 1500X converting from front- to down-firing.

Wireless convenience right out of the box

Even if you're willing to place your sub far from your receiver, you might not want a long wire running between the two. No worries, thanks to the 700W's built-in wireless receiver and included transmitter. So you can feel those deep rumbling movie sound effects without tripping over a cable when you get up to get more popcorn.

Not just for explosive movie soundtracks

When you add a subwoofer to your full-range speaker system, your movies and music will sound fuller and more dramatic. The Dynamo 700W accomplishes this without taking up valuable real estate in your living room or home theater. The sealed enclosure is constructed of high-density materials and reinforced with solid internal bracing to minimize cabinet resonance for cleaner sound. The 10-inch speaker is driven by a high-powered built-in amplifier that delivers 300 watts of continuous, clean power. Both are optimized for low noise and distortion, to produce bass that is not only bold, but detailed and tight rather than loose and boomy. That makes this sub a great performer with movies and music — not to mention a great match with MartinLogan's fine lineup of full-range speakers.

MartinLogan Dynamo 700W powered subwoofer with wireless transmitter

The Dynamo 700W's detachable feet let you easily orient the woofer in a down- or front-firing configuration.

MartinLogan Dynamo 700W is very good product. It delivers not just low friquency it creates dramatic scenes and keeps your feelings on a high level all the time

Michael, Cleveland, OH

What's in the Box:

  • Powered subwoofer
  • Wireless transmitter (SW-T)
  • AC power adapter (w/ attached 6' DC cord)
  • 10' AC power cord
  • Cloth grille
  • 4 Pre-installed rubber feet
  • 4 Spiked feet
  • 2 Righ-angle RCA adapters
  • User's Manual (En/Fr)
  • Product Registration Card

Product Highlights:

  • wired or wireless connection options with built-in wireless receiver and included transmitter
  • frequency response 24-200 Hz (±3dB)
  • built-in amplifier delivers 300 watts of continuous power, 600 watts peak output
  • ultra-efficient variable audio tracking power supply drives a class AB output stage for lower distortion and noise than typical Class D switching amps
  • 10" polypropylene woofer cone
  • sealed (acoustic suspension) cabinet with convertible front- or down-firing design
  • continuously variable low-pass 35-120 Hz crossover
  • rear-mounted 3-position phase switch, volume level, and crossover controls
  • auto on/off
  • line-level/LFE RCA input
  • included Energy Transfer Coupler (ETC) spikes can be used for tighter coupling between subwoofer and floor to enhance sound quality
  • black ash finish
  • 11-11/16"W x 12-9/16"H x 12-7/8"D (down-firing orientation); 11-11/16"W x 13-1/2"H x 12-5/16"D (front-firing orientation)
  • weight: 26.5 lbs.
  • warranty: 3 years (with product registration)
  • Our 60-day money-back guarantee

MartinLogan Dynamo™ 700W Reviews

Average Customer Review(s):

(13 Reviews)

MartinLogan Dynamo 700W

Michael from Cleveland, OH on 2/17/2017

Crutchfield Customer Review (What's this?)

MartinLogan Dynamo 700W is very good product. It delivers not just low friquency it creates dramatic scenes and keeps your feelings on a high level all the time



Packs some punch

biomrl from Clifton, VA on 9/29/2016

Crutchfield Customer Review (What's this?)

Packs a big punch in a small package. Mostly controlled by receiver. Sound is great. Only there when it needs to be. Comes with wireless connection to receiver if needed (I wired it direct). A great compliment to Martin Logan Motion XT60's and Motion XT50.

Pros: Great sound. Wireless connection. Compliments MartinLogan speakers very well.

Cons: None

Martin Logan Dynamo 700w

Frank from West Chester, OH on 5/18/2016

Crutchfield Customer Review (What's this?)

I recently purchased a Yamaha YSP-5600 soundbar to replace a 5.1 speaker system to make better use of the space we have. I then decided I might as well upgrade my subwoofer and was looking for something with a small footprint and that was also wireless. After reading reviews and looking at different brands I decided on the Martin Logan Dynamo 700w. I was not familiar with their products but decided to go ahead with the purchase. After the initial shock of how small the sub was, I did not think that this was such a good idea. Wrong! This puts my old much larger ported sub to shame. The bass is tight and sounds great!

Pros: small size great sound wireless

Cons: none

Martin Logan Dynamo 700

Rd iii from Murrieta ca on 1/27/2016

Crutchfield Customer Review (What's this?)

For being a small subwoofer it sure packs a punch . It brought out the lows that I was missing .great addition to my Martin Logan set up.

Pros: It's wireless . I like the small size does not take up to much space.

Cons: Non

MartinLogan Dynamo 700W subwoofer

LC from Cary, North Carolina on 11/8/2015

Crutchfield Customer Review (What's this?)

I'm still amazed at the sound and power of this subwoofer, from a cube that's about 12x12x12 inches. It can literally rattle the walls (which I did accidentally when first setting up). I've had 2 other subs ( Sony and John Thomas) that couldn't hold a candle to this MartinLogan. It took a little playing around to find the optimal location (thank goodness it's wireless except for the power cord), but I found the sweet spot, so the bass seems to come from the PSB X2Ts I also purchased from Crutchfield. I listen almost exclusively to classical music (specifically baroque), and although the PSB X2Ts have dual 6 1/2 inch woofers, this sub adds a true extra dimension. I highly recommend it.

Pros: Quality of construction and (needless to say) sound that you hear and feel, without making your ears bleed.

Cons: None. I do agree with another review that a piece of electrical tape over the lights would be beneficial (they could serve as night lights).

Great sound, could be more user friendly

RDZ from Pittsburgh, PA on 10/21/2015

Crutchfield Customer Review (What's this?)

Great sound, exceptionally powerful, fantastic companion to Vision soundbar.

Pros: Great sound, awesomely powerful

Cons: Subwoofer shuts itself off when watching tv shows or video at lower volumes. Have to turn volume up on soundbar to turn sub back off. Controls don't make it easy to fine tune settings.

MartinLogan Dynamo™ 700W

Gordon F from Philadelphia PA on 12/7/2014

Crutchfield Customer Review (What's this?)

Wireless was a plus especially for the wife who hated wires around. Have heard bass that I had not with a Bose Acoustimass 15. Blended seamlessly with my Martin Logan LX-16 and Motion 8 Center Channel.

Pros: Ease of use and great sound.

Cons: None

MartinLogan Dynamo 700W

Judge Tom from Olney Maryland on 5/18/2014

Crutchfield Customer Review (What's this?)

Wireless feature is outstanding for difficult placement situations..Set up is effortless and they blend in perfectly with two Definitive Technology Studio Monitor 55's in a 12 by 20 ft room with large openings at either end.A larger sub would be superfluous.

Pros: versatile and great value for the money

Cons: none

Concert in the family room

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

Crutchfield Customer Review (What's this?)

Awesome, I already had a sub and wanted to add a second. I'm using this one in wireless mode, no interference so far. The sound is great, still tweaking the placement and gain. I have it firing downward. Thinking about placing tape over blue light in back. Already I can tell it's the best sub in the house. The only problem was the first sub I got a random thumping noise, I advised Crutchfield and they immediately sent out another. This one worked perfectly. No regrets

Pros: Great addition, I want to say it added warmth to the music. I'm playing a lot of old school R & B, the bass is tight.

Cons: Non, so far

Very Solid Sub, with some minor quirks

Luke from Charlotte, NC on 3/30/2014

Crutchfield Customer Review (What's this?)

This is a very solid and powerful sub. I have it connected through my Martin Logan Motion View sound bar, and the sub delivers quite a punch when it's active. The key word there is active. If the volume on the sound bar is low or you're watching a sitcom or scene with not a lot of bass, the sub does go into stand by mode. And in order to get it active again, you have to turn the sound up in order for it to register. I have not determined whether this is attributed to the sub being connected through a wireless connection versus a direct connection into the sub. Also, there are times the sub doesn't register a signal during a non HD movie (meaning no surround sound). I would think the sub would still come on, but it does not.

Pros: Powerful sound when hooked up Easy to connect via a wireless connection Configuration options to make it fire down or out

Cons: Inconsistently goes in and out of stand by mode During scenes with heavy dialog and no background music or sound, the sub sometimes transmits a tick / popping sound. Don't know if that is because of wireless interference or something else

Powered Sub

Whitney from Charlotte, NC on 11/11/2013

Crutchfield Customer Review (What's this?)

Great Product and Great Service.

Pros: Great sound, easy to set up.

Cons: None

Wireless Sub Woofer

Perry S. from Tulare,CA on 10/16/2013

Crutchfield Customer Review (What's this?)

Sounds as good as it looks. Located sub about 20ft. away from Yamaha receiver (which is located in an armoire) with no pick-up or distortion issues. If you want a wireless sub you certainly can't go wrong with this one.

Pros: Quality. Ease of installation. No wires !!!!

Cons: None

MartinLogan Dynamo 700W

cmac from CA on 9/1/2013

Crutchfield Customer Review (What's this?)

Big sound. Wifi great. does make a cycling noise when going into energy saver mode that is disconcerting




Hands-on research

Features and Specs

Enclosure Acoustic Suspension
Video Shielded No
Woofer Size (inches) 10
Woofer Composition Poly
Firing Direction Down/Front
Wireless Yes
Preamp-Level Inputs Yes
Speaker-Level Inputs No
Speaker-Level Outputs No
Low-Pass Crossover Freq 35-120
High-Pass Crossover Freq N/A
Phase Switch Yes
Amplifier Output (watts) 300
Frequency Response 24-200 Hz
Height (inches) 12-9/16
Width (inches) 11-11/16
Depth (inches) 12-7/8
Weight 26.5 lbs
Speaker Parts Warranty 3 Yrs w/ Registration
Speaker Labor Warranty 3 Yrs w/ Registration
Amplifier Parts Warranty 3 Yrs w/ Registration
Amplifier Labor Warranty 3 Yrs w/ Registration

Product Research


Dynamo Series Powered Subwoofer: The MartinLogan Dynamo 700w powered subwoofer offers audiophile grade performance and home-friendly aesthetics. Featuring a high-current 300-watt RMS (600-watt peak) amplifier and a 10" cone driver, the Dynamo 700w delivers deep, tight, effortless bass for movie and music soundtracks. It can be configured as a down-firing or front-firing powered sub. The 700w offers both a wired and wireless powered subwoofer connection to your home AV entertainment system.

Advanced, Ultra-Efficient 300-Watt Amp: The Dynamo 700w's ultra-efficient, high-power amplifier uses variable audio tracking power supplies to drive its class AB output stage. With lower distortion and less noise than typical Class D switching amplifiers, this advanced design allows the amplifier to operate at much higher efficiencies than a typical class AB amplifier, delivering a true 300-watts of continuous power (600-watts peak).

High-Resolution, Low-Distortion 10" Woofer: The Dynamo 700w's advanced-technology driver pairs a high-power magnet structure with a 10" poly diaphragm to deliver huge excursion and sound output while perfectly preserving the tiniest bass detail; and all without a hint of distortion. The exceptional damping properties of the poly cone material also ensure the smooth, non-resonant response necessary for truly seamless blending with MartinLogan's electrostatic panel and Folded Motion driver technologies found in their loudspeakers.

Inverse Mathematical Equalization (IME) Filtering: An IME filter is derived from the inverse of the unfiltered driver response. Precision IME filtering yields extremely accurate low-frequency response; far superior to that provided by the simple second-order high-Q filters typically found in subwoofers in this price range.

Sealed Cabinet w/ Internal Bracing: On the outside, the Dynamo 700w's cabinet is constructed from the finest composite material for acoustic integrity. Inside, critically placed structural cross-bracing acts an excellent baffle for the woofer while the added rigidity keeps cabinet-induced resonances and non-linearities to inaudible levels. As a result the MartinLogan Dynamo 700w maintains a smooth, consistent response regardless of music or movie source material.

Front-Firing or Down-Firing Configuration: To maximize performance when installed inside of a cabinet or other discrete installation, the Dynamo 700w's standard down-firing configuration easily converts into a front-firing orientation; no tools required. A grille cover and 90-degree RCA adaptors are provided for use in front-firing applications. Dimensions:

  • Down-Firing Orientation (default): 11.6875" (w) x 12.5625" (h) x 12.875" (d)
  • Front-Firing Orientation: 11.6875" (w) x 13.5" (h) x 12.3125" (d)
Note: If placing the powered subwoofer inside of a cabinet, it is recommended that there be a minimum of 3" of open space between the cabinet and the front and back sides of the powered sub.

Seamless System Integration: Comprehensive connection options, low-pass filtering, and phase control make integrating the Dynamo 700w subwoofer into a multi-channel home theater or stereo music setup simple and seamless. The main left/right line-level inputs feed into a precision low-pass filter with a cut-off frequency variable from 35 to 120 Hz. For systems in which the AV receiver supplies the low-pass crossover, the Dynamo 700w offers an LFE input that bypasses its internal filters. The phase control can be set to 0, 90, or 180-degrees.

Built-in Wireless Receiver: Although correct placement plays a key role in optimizing subwoofer performance, sometimes it imposes the inconvenience of running long lengths of cable through walls, along baseboards, or under floors and carpets. To solve the problem, the Dynamo 700w incorporates a wireless receiver (digital RF transmission) for use with the included SWT-2 MartinLogan Subwoofer Wireless Transmitter which plugs into the subwoofer or LFE output of your home receiver or active soundbar speaker via stereo RCA (cable not included).

Energy Transfer Coupler (ETC) Spikes: The Dynamo 700w comes with custom ETC spikes which can be used along with the pre-installed rubber feet to enhance stability on thick carpets, or create tighter coupling between subwoofer and floor to enhance overall sound quality. The spiked feet add 0.625" of height to the powered sub.

Auto Power On/Off: The powered subwoofer will automatically enter a power saving mode when no audio signal is detected. The subwoofer will automatically come out of power saving mode when an audio signal is detected.

Break-In Period: The Dynamo 700w woofer requires approximately 50 hours of break-in at moderate listening levels before its optimal performance occurs. This will factor in on any critical listening and judgment.

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?

Was highly recommended as one of the 10 best subs at $1000 or less [ Bill  Dec 26, 2016 ]
Excellent Martin Logan sound bar bought from Crutchfield and wanted to enhance my system by purchasing the Martin Logan subwoofer [ J G  Sep 03, 2016 ]
Has very good reviews and believe it will be a good fit with my other Martin Logan speakers [ Terry  Aug 15, 2016 ]
best match for my system (Marantz SR6010) when added as a 2nd sub. Otis was a tremendous help and he really acted in my best interest. Thanks Otis' Bio: [ Joel  Apr 30, 2016 ]
Wireless subwoofer with great reviews. All research points to this sub as a winner. [ Mark  Mar 28, 2016 ]
matches my surround system which is all Martin Logan [ Linda  Mar 01, 2016 ]
Looked like what I needed [ Steven  Jan 01, 2016 ]
Great sounds [ CINDI  Dec 13, 2015 ]

3 questions already asked

If you purchased the product from Crutchfield, feel free to contact our Tech Support team. They can walk you through the settings on the product and see if there may be a fix. Our toll-free Tech Support number is printed on your invoice, and is also available under the "My Orders" tab in the "My Account" section of our website. If you did not purchase the unit from Crutchfield, then you may want to contact the manufacturer. You can also post your question in our forums: Or try our online support center: [ Krissy  Feb 12, 2017 ]  Staff
Yes, it has to be wired to the preamp. [ Czeslaw  Jan 04, 2017 ]
Yes, it's a little box that you connect to your pre-outs or sub woofer out and to an 110 outlet. It has a blue pilot light as does the back of the amp/speaker. The unit goes to sleep after a short period of no signal. Actually, I can't tell the difference between this unit and the hard-wired unit I have on another system. [ Steven  Jan 03, 2017 ]
YES.... It plugs into one of the Sub inputs on the receiver. This sub is amazing and needs time to "burn in," meaning after a few weeks of solid use it really comes into it's own! I do wish it weighed more... [ Joel  Jan 03, 2017 ]
Yes, you plug it into the sub pre-out just like you would normally do with the subwoofer. You also need to plug it into an outlet for power. [ Michael  Jan 03, 2017 ]
yes, the transmitter transmits the signal wirelessly to the sub. [ Joshua  Jan 03, 2017 ]
I'm not really sure how to answer this except to say that mine is matched up to a McIntosh MA 5200 and it works just fine, but the room is rather small (14x14 w 10' ceiling) so I don't crank the sub up but a little. [ Steven  Nov 20, 2015 ]
Yo don't. It has a built in amp. You size the sub to the room. [ JEFFREY  Nov 20, 2015 ]
Unfortunately I cannot be of assistance. I purchased my speakers for a move and they are still in the factory packaging. Sorry [ MICHAEL H  Nov 20, 2015 ]
The sub is self powered. You just need to connect to your sub pre amp out or LFE. Also this sub is wireless. [ CALVIN L.  Nov 20, 2015 ]
Since the Dynamo is a powered subwoofer it should not draw off the receiver. I have a 8 year old H/K receiver with 75 watts per channel. I played the Saint-Saens Organ Symphony and there was absolutely no problem. The wood floor literally shook due to the down firing bass driver. It is also great due it is wireless capability with no wires running from the unit, [ Gordon F.  Nov 20, 2015 ]
You can get any receiver. It has gain so you can shape the sound to come in soft for low power or hard for big power. [ BRYAN  Nov 20, 2015 ]

Looking for more? Check out the next model in this lineup.

MartinLogan Dynamo 1000W

Get a larger driver and more power

The MartinLogan Dynamo™ 1000W offers these features:

built-in amplifier delivers 500 watts of continuous power, 1000 watts peak output

12" polypropylene woofer cone

frequency response 22-200 Hz (±3dB)