Larryi, a comment about your opinion with respect to the bass. Having been an owner of the Duos for almost 5 years, I agree with you. But, three years I had the opportunity to compare the standard subwoofers with subs upgraded with other electrolyt capacitors in the power of these. The upgraded subs had ELNA Cerafine caps, with a total capacity of 150 % MORE than original. And that sounded definitely better!
Better cotrol, more speed, and more nuances; in total a more natural representation of the bass. And with this change the bass also seems better integrated with the rest of the speaker system.
Better cotrol, more speed, and more nuances; in total a more natural representation of the bass. And with this change the bass also seems better integrated with the rest of the speaker system.

