Execellent Sub
An excellent sub when coupled with my Motion 15 bookshelf speakers and ATX speakers.

Updating 11/2011 review of Electromotion ESL and the Dynamo 500 subwoofer
After purchasing the Martin Logan Electromotion ESL, I bought the Dynamo 500 subwoofer. I loved my Martin Logan Electromotion ESL when I bought them, I enjoy them even more with the Dynamo 500. The bass is now firm and extended. No flabby bass here. The subwoofer integrates perfectly with the ESL speakers. My decision to purchase the M-L Electromotion ESL and Dynamo 500 have to be the best audio decisions I have made in decades. I had drifted away from audio for many years. The M-L speakers and sub-woofer drew me back and audio now is one of my life pleasures. On top of that has been the outstanding service. There was some fraying of a power supply cord. A minute to write an email to support and a new cord was on the way. There is no second guessing about the purchase of M-L speakers in my household. Thank you, Martin Logan people! Ron

awesome bass
love the bass so much

Dynamo 5000
This is a replacement of a, retired to my garage setup,15 year old 12" jbl psw-1200. (2x the size of the ML) The ML sub cabinet is very well constructed. It is solid and has no signs of resonance. The rear amp controls are easy to read and adjust. The heat sink is huge! I'm guessing it puts out more than the stated 120 watts rms. The speaker appears to be a good sq / spl mixed design. My only concern is the dual rear port design. Besides the inability to put them in the front due to size limitations, I can only guess that it aids in minimizing unwanted port noise. So far this ML has impressed me with very musical and accurate low end reproduction. Whether the music calls for punch, deep bass, or just low end, the results were great. It blends in well with my satellite B&W 685s and center 62b. And all this at half the size!

Booming Base
Booming base makes floors rattle and shake when loud sounds from bombs or earthquakes are played on movies or TV. Great base sounds!

deep bass
Lets say i like bass and this sub has what it takes to make a bass head happy. It is accurate and and really works well with the motion 4 on wall speakers. Thanks Martin Logan!!!!

Very Pleased
I am very satisfied with punch and clean sound that the 500 provides. I purchased this unit as part of my 5.1 theater surround sound system. It sounds great while watching movies and has a clean powerful bass while listening to music. I listened to six different subs before making my decision on the Dynamo 500. My TV room is 16x20 and the 500 delivers plenty of bottom end for this size room. I would recommend you find a store with this sub and a few others and make your own decision.

Excellent sound quality, simply incredible!
This is a fine subwoofer and if you use your ears and not all the specs hype of other subwoofers you will be pleasantly surprised! I actually did not intend to buy this subwoofer, I went to test two other subwoofers and came across this one in the test theater. I was amazed at how much cleaner and audible the bass response was compared to the two I went to demo. I was originally looking at the deftech sub1000 and super8. I accidentally switched this one on while looking for the deftech sub1000 input, since the numbers in the demo rooms never seem to match how they are labeled on the console. I couldn't believe how good this sub sounded. I had to search the room feeling the different subs to find out which one was making this amazing sound. Talk about surprised when i finally discovered that this little guy was responsible for the sound quality i was hearing. And the price was comparable to the sub1000 and lower than the super8. I took a chance since I hadn\'t spent anytime researching this sub and took it home. Now 6 months later I am still amazed at how good this sounds. Fills my 16x20 living room and is a warm controlled sound, not sloppy or boomy at all. Just really great and I get lots of compliments on this sub. People can not believe it is only one 10" and 120 watts rms. Like I said don't believe all the hype, let your ears be the judge! I heard 400 watt subs that cant go as low as this one. Give it a try and you won't be disappointed, I promise!

Excellent sound quality, simply incredible!
This is a fine subwoofer and if you use your ears and not all the specs hype of other subwoofers you will be pleasantly surprised! I actually did not intend to buy this subwoofer, I went to test two other subwoofers and came across this one in the test theater. I was amazed at how much cleaner and audible the bass response was compared to the two I went to demo. I was originally looking at the deftech sub1000 and super8. I accidentally switched this one on while looking for the deftech sub1000 input, since the numbers in the demo rooms never seem to match how they are labeled on the console. I couldn't believe how good this sub sounded. I had to search the room feeling the different subs to find out which one was making this amazing sound. Talk about surprised when i finally discovered that this little guy was responsible for the sound quality i was hearing. And the price was comparable to the sub1000 and lower than the super8. I took a chance since I hadn\'t spent anytime researching this sub and took it home. Now 6 months later I am still amazed at how good this sounds. Fills my 16x20 living room and is a warm controlled sound, not sloppy or boomy at all. Just really great and I get lots of compliments on this sub. People can not believe it is only one 10" and 120 watts rms. Like I said don't believe all the hype, let your ears be the judge! I heard 400 watt subs that cant go as low as this one. Give it a try and you won't be disappointed, I promise!

Excellent sound quality, simply incredible!
This is a fine subwoofer and if you use your ears and not all the specs hype of other subwoofers you will be pleasantly surprised! I actually did not intend to buy this subwoofer, I went to test two other subwoofers and came across this one in the test theater. I was amazed at how much cleaner and audible the bass response was compared to the two I went to demo. I was originally looking at the deftech sub1000 and super8. I accidentally switched this one on while looking for the deftech sub1000 input, since the numbers in the demo rooms never seem to match how they are labeled on the console. I couldn't believe how good this sub sounded. I had to search the room feeling the different subs to find out which one was making this amazing sound. Talk about surprised when i finally discovered that this little guy was responsible for the sound quality i was hearing. And the price was comparable to the sub1000 and lower than the super8. I took a chance since I hadn\'t spent anytime researching this sub and took it home. Now 6 months later I am still amazed at how good this sounds. Fills my 16x20 living room and is a warm controlled sound, not sloppy or boomy at all. Just really great and I get lots of compliments on this sub. People can not believe it is only one 10" and 120 watts rms. Like I said don't believe all the hype, let your ears be the judge! I heard 400 watt subs that cant go as low as this one. Give it a try and you won't be disappointed, I promise!

The Subwoofer You Can't Miss for the Price
It was time to update my listening experience. I thought that all I needed to do was find a good base end to augment the older NEC subwoofer on my current home theater system. Larger room, two subwoofers, easy match, eh? Not so fast... When I listened to the bass curve response of the Dynamo 500 unit in comparsion to Velodyne and Definitive Audio subwoofers I didn't image that there could be this great of a difference. The harsh brassinesss of other units was easily offset by the clear, warm response of the Dynamo 500. I wish all other choices were as clear cut. My old NEC subwoofer is now history.

Awesome
Crazy love, I replaced a sub by Mirage. Clearly hear the difference cost just tidbit more. Definite upgrade.