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  • MartinLogan Dynamo 300 Home Theater and Stereo Subwoofer
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MartinLogan Dynamo 300 Home Theater and Stereo Subwoofer

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Price: $129.99 & FREE Shipping. Details
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  • Ultra efficient low-distortion, 75-watt amplifier with 150-watt peak output
  • Low-distortion 8-inch polypropylene cone woofer
  • Low-turbulence port for extreme bass output
  • High-density cabinet construction
  • Connects via Stereo Left/Right Inputs or Home Theater LFE Input
2 used from $249.00
Is this a gift? Please note that this item ships in its own packaging and cannot be gift-wrapped or concealed.

Frequently Bought Together

MartinLogan Dynamo 300 Home Theater and Stereo Subwoofer + Mediabridge ULTRA Series Subwoofer Cable (15 Feet) - Dual Shielded with Gold Plated RCA to RCA Connectors - Black + Mediabridge Ultra Series - CA Y Adapter - 1-Female to 2-Male for Digital Audio or Subwoofer
Price for all three: $149.97

Buy the selected items together


Special Offers and Product Promotions

  • Amazon Free 30-Day Tech Support: This item is eligible for free tech support for 30 days from the date of delivery. Over the phone, our trained technicians can help you set up, configure, connect, and troubleshoot so you can start enjoying your new purchase. Owners of qualifying products can reach Tech Support by calling 1-800-362-5703. Learn more


Product Specifications

Brand NameMartinLogan
Color NameBlack Ash
Driver Configuration8? (20.3 cm) polypropylene cone;ported
Frequency Response Curve32 Hz-150 Hz
Speaker Driver Material TypePolypropylene
RMS Power Range - Amplifiers75 watts

Technical Details

  • Brand Name: MartinLogan
  • Model: Dynamo 300
  • Color Name: Black Ash
  • Warranty: 3 year parts and labor warranty

Product Details

  • Product Dimensions: 13.8 x 12.6 x 14.2 inches ; 21.5 pounds
  • Shipping Weight: 26 pounds (View shipping rates and policies)
  • Shipping: This item is also available for shipping to select countries outside the U.S.
  • Shipping Advisory: This item must be shipped separately from other items in your order. Additional shipping charges will not apply.
  • ASIN: B004LRPXAU
  • Item model number: Dynamo 300
  • Average Customer Review: 4.6 out of 5 stars  See all reviews (117 customer reviews)
  • Amazon Best Sellers Rank: #2,613 in Electronics (See Top 100 in Electronics)
  • Date first available at Amazon.com: January 31, 2011

Product Description

Every element of Dynamo 300, from driver to amplifier to crossover to cabinet, is meticulously designed and manufactured to our highest standard. The result is staggering low-frequency performance for a subwoofer of its size and price. Perfect for either home theater or stereo applications, the Dynamo 300 is built with high-density materials to minimize cabinet resonance and provide a solid foundation for the high-output 8-inch woofer and high-current 75-watt, 150-watt peak amplifier. Whether you are looking for high performance bass to enhance your music experience or take your home theater system to the next level, a new Dynamo family subwoofer should be at the top of your list.

Customer Questions & Answers

Customer Reviews

I can see it will be even better after break in.
Marc P.
If youre looking for a reasonably priced sub with great performance, the dynamo 300 is what you want.
A Doo
It has enough power to fill my small room with very good bass and works well on movies and music.
A. Ioannides

Most Helpful Customer Reviews

59 of 60 people found the following review helpful By A. Ioannides on April 12, 2012
Verified Purchase
I have a pair of Martin Logan Sequel speakers for my main 2 channel listening and have always been impressed with the bass the 8" drivers deliver. So when I setup my home theater, I got a Grotto sub and was really impressed with the definition and extension of the subwoofer. I've got a smaller system that features a pair of Mission speakers and a low cost receiver with a sub output and was looking for a low cost sub. I found this the Dynamo 300 for less than $250 on Amazon and thought I would give it a try.

It was delivered the next day (WOW) and is a bit smaller than the Grotto, but had the familiar look and feel of an American made product from Martin Logan. One problem was the port extension had come lose inside and needed to be reattached. Rather than send it back, I just took the amp out and fixed it myself. Setup was pretty easy with my Onkyo receiver, I set the crossover frequency at 100 and started playing with placement. After a couple of days of break in, playing with the placement and reducing the crossover in my receiver to 90, it started giving me the results I was looking for. It has enough power to fill my small room with very good bass and works well on movies and music. Don't let the 70 Watt rating fool you, this thing tumps.

The sound is accurate and tight. The extension is very good, it goes much lower than I expected and without being boomy like so many woofers. Some notes: Setup the system to crossover to take over where your main speakers leave off, as low as you can. My speakers can go down to 50 Hz but don't do a good job at anything below 80 Hz so I set the crossover at 90 Hz. At 100 Hz it was way to boomy. I then used the receiver crossover to remove anything below 90 Hz going to my main speakers and that made a huge improvement.
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48 of 48 people found the following review helpful By Xero on August 23, 2012
Verified Purchase
I was a bit hesitant to buy a Martin Logan sub at first. I know that sounds weird because, hey, it's Martin Logan, but there's a perfectly good reason. I was concerned that a company who makes speakers that sell for thousands of dollars would REALLY drop the ball when it came to a sub that sells for less than $200.

I read through all the reviews and got a good feel for what to expect. A sub that, at first, would sound a bit harsh, but that would "settle" as it moved past the break-in period.

I received it on the very same day predicted by the Amazon ordering system, and raced home to set it up, leaving work early and breaking several speed limits in the process. The packaging was solid, and the sub arrived in good condition.

After reading the manual, I proceeded to set it up in the front corner of my entertainment room. The reviews were right, it DOES sound a bit harsh and out-of-place at first. The bass hits were heavy and sort of distorted, but this was to be expected after reading through the manual as well as all of the prior customer reviews. I watched a couple of movies with good sound-tracks "The Dark Knight", "300", and "Braveheart" to see how it would integrate with my system. Although the sound did have that harsh edge, it still produced a much better overall theater presence than my sub-less system did the day before. I decided to break it in the quick way, and set up some streaming music to play continuously during the day while I was at work. After a few days of 8+ hours of music playing through it at a moderate volume, the edges started to smooth out and the sound became much more musical and transparent.

People say the best speaker is the one you forget is there, and that's exactly what this sub is.
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30 of 35 people found the following review helpful By Capt RB on February 19, 2012
Verified Purchase
The Dynamo 300 sub may seem to be under-spec'd for it's price. You can certainly buy larger subs for the money, but this sub does a very good job, being both accurate and fairly powerful. It produces very usable bass into the 30hz region and loads up well enough to create the effect of going even deeper. I've got a primary system consisting of Merlin speakers and Manley tube amps, but this small sub was bought for a 2nd system with Motion 4's and a Denon amp. It's doing an excellent job thus far and, in a medium sized room, can produce a satisfyingly musical bass-fill for small speakers. After a short break-in I found the the 300 was creating a very well blended and detailed accounting of itself. Pressed into action for movie material it handled the likes of Real Steel and King Kong with authority, though please remember that this sub is probably not suited to larger rooms for HT. I own a 10" audiophile sub that costs 6 times the price of this sub, yet the 300 sounds very much like a member of the more elite sub designs, which is quite an accomplishment at this price point. As I said, you can buy larger subs in this price range and get deeper bass, but you'll lose out on accuracy.
Now I know Martin Logan is serious about their image and products, so here are a couple of suggestions:
1) Get rid of the horrible spring speaker connections. They scream cheap on any modern product. Most people will probably use the LFE connections anyway, but every choice made still effects the overall impression of the product. I wish I had been at the meeting when this decision was made.
2) Consider making the crossover control a bit better so far as labeling it in greater detail. This way the user can easily keep track of what they're trying during setup.
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