I was on the fence for months, back and forth, reading countless reviews on subwoofers. The merits of sealed v. Ported, amp.size, lowest frequency and the myriad of facts and first hand accounts. Well, I finally made my decision. The Dynamo 600x, albeit not a powerhouse and not reaching that sub infrasonic low, is a capable piece of kit. The overall tonality and performance of my system has greatly improved. Music and movies have once again taken on new life and with nearly 30 hours now on the amp, it is really beginning to hit and play with a musicality and precision that I was in search of. Sure, I could have gone further up the line, more watts, larger driver but I don't think it would have made a difference. Now, I know with the addition of another 600x in the future I will have the exact sound Ive desired. I'm on a budget and frankly Martin Logan has delivered in a very satisfying manner. Thank you to the men and women that develop such incredible gear. You have my praise and a fan for years to come!!