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

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!!!!

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.

Martin Logan offered me a fix to the popping noise on my subwoofer. They are a stand up Company. I am very pleased with the customer service dept.

I recently purchased two motion 12 speakers, one motion 8 center, and two motion 4 speakers. I also purchased the dynamo 500 sub. I am extremely satisfied with all the speakers except the sub. It pops when it turns itself off or goes into sleep mode. I was told by Martin Logan this is normal, but i find it annoying on a $500.00 sub.

MartinLogan Response:
Angelo - We agree! We heard feedback from our customers and decided to do something about it. We will replace your subwoofer backplate amp with a new one that has the modification in place to eliminate the "pop" you hear when it's turned off.

Also, all new production units built after August 2010 will have the new modification and will not thump on shut down. If you have a Dynamo500 that does, please contact our service department for a free replacement backplate.

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!

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.

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