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MartinLogan Dynamo 300 Home Theater and Stereo Subwoofer

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Price: $129.99 & FREE Shipping. Details
In Stock.
Ships from and sold by Amazon.com.
  • 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
1 used from $349.00 2 refurbished from $119.00
This item’s packaging will be visible when delivered and cannot be gift-wrapped.
Warranty Details: Click here for Warranty Information
$129.99 & FREE Shipping. Details In Stock. Ships from and sold by Amazon.com.

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 RCA Y-Adapter (12 Inches) - 1-Female to 2-Male for Digital Audio or Subwoofer
Price for all three: $149.97

Buy the selected items together

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

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.

Product Details

Warranty [PDF]
  • Product Dimensions: 13.8 x 12.6 x 14.2 inches ; 21.5 pounds
  • Shipping Weight: 25.6 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.
  • Item model number: Dynamo 300
  • Average Customer Review: 4.6 out of 5 stars  See all reviews (185 customer reviews)
  • Amazon Best Sellers Rank: #3,502 in Electronics (See Top 100 in Electronics)
  • Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.
  • Date first available at Amazon.com: January 31, 2011

Customer Questions & Answers

Customer Reviews

For a small sub it really produces a tight deep bass sound.
If youre looking for a reasonably priced sub with great performance, the dynamo 300 is what you want.
A Doo
This is an attractive, well built, and great sounding small subwoofer.
Brendan Bisson

Most Helpful Customer Reviews

72 of 74 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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67 of 70 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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12 of 13 people found the following review helpful By Telecaster on March 25, 2014
Verified Purchase
I bought this to ultimately use with the Andrew Jones Pioneer SB41 and SB21 speakers I grabbed. Haven't got to that setup yet but instead to break it in inserted the Dynamo 300 in my existing Home Theater system I've had for 6 yrs with Infinity P162's and a PSB Subsonic 5i 10" sub that cost over well over $500. After the initial period of a week of near continuous play - some at low level I can say the Dynamo 300 continues to sound lower, tighter, quicker with passing time, now over 3 weeks. Don't be quick to judge it. It is about a foot out from a corner, same as the PSB has been. Not ideal. As a music sub it has impressed me with its pitch definition after careful adjustment. It is NOT a boomy, floppy mess like many competitors in its price range, even down firing. I've pushed it pretty hard and been more than satisfied. No, its not as good as the awesome PSB Subsonic 5i, which is quicker still and has much more dynamic range and punch at the same average level. But the PSB is one of, if not the best, in its own price range, which is much more expensive. I still think the PSB Subsonic One is the 8" class leader, but again more expensive. So for now, at the price a steal as a musical sub, I may post back after checking it more as a video sub but it's not my intention to use it that way anyway. Probably would be better to move up a notch for that use to crank a bit more.

A note on adjusting - I pay no attention to the marked frequency levels. First, set both sub controls straight up if not too loud, and run a test just to set the phase switch, as it should be very obvious to leave it at the position with the MOST bass, as then it will be in phase with the front speakers. Next I set the volume knob at the straight up position and adjust as needed from my Denon receiver remote.
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MartinLogan Dynamo 300 Home Theater and Stereo Subwoofer
This item: MartinLogan Dynamo 300 Home Theater and Stereo Subwoofer
Price: $129.99
Ships from and sold by Amazon.com