I got the materials for the next box !
For now I am going to make an adapter so I can use an 18" sub in my 211.21 box , until I can afford more 21s . My next box I'm building size 6'2"x47"x25 will hopefully go down to a few hertz , I looked at W bins Shearer Bertha Emerald Tuba and Titan and come up with my own design . I'm also trying to sell of my odd speakers so I can get more 21s and I need better amplifiers . I am running this monster with a Behringer Europower 4000 bridged and its not enough , the amp clips way to easily and I am not going to fry my 6" voice coil . Was looking at a Crown 5002VZ on auction but the price keeps going up and the others online are already above $1500 . Hears my one Altec piece I am going to sell http://rockford.craigslist.org/msg/2967675248.html.