[bonehead848]

Do you have any wordworking skills? If so you may want to try your hand at building a sealed sub. That way you could make it the exact dimensions you want and it will be cheaper and perform better than other subs in your price range. I know this does not directly answer the question you are asking but it is a great option.

 

[bonehead848]

Can I ask - Making ones own speakers are they that good? I mean I am looking at spending $4k on a sub can one be made better then that? & the time it takes to know how they work???

Will I build a sub to play sub 20Hz? with no port noise?

woah, psw10 to a 4K budget is much larger than I was expecting, haha. DIY does not take terribly long to learn especially on a site like this where people will be very helpful. For your budget getting below 20 would be a piece of cake. If you are really interested I would post a thread in the DIY subwoofer area with your budget, space requirements, and thoughts.

If you decide against DIY or just want some retail subs to look at check out the JL Audio Fathom f113 and the SVS line.