this guys looking for a small setup, not IASCA winner.. and even so... most of the time if you want to hit 20hz... you gotta raise it with an EQ and lower the other freqnecies to match... i dont know of any sub that magically plays flat to 20hz, you find one, let me know.. im getting it
and on top fo that you cant even really hear 20hz... you can feel it