Well peeps, I had the pleasure of listing to the IDQ v.3 for two weeks in a 1.25 ported @ 32hz and it is one clean and smooth sounding sub even in a port. I have 5.25 chameleons and this sub compliments this set quit swell @ 80hz low passed. The tonality of this sub is just amazing, natural, tight and smooth like a hot girl : ) It has a pretty wide range response so it can hit the higher notes and can get also get low, it just really brings out the music and thanks to the suspension the transitions are just awesome. Its really seems to be an all around performer with an Image dynamic sound and it was only a 10''. I was truely impressed. Can't wait for the 15'' though.