Ok well here are the factors involved in this and this is my first time EVER doing anything like this..and it's good to note that i am a total newbie to HT's in general Ok i was thinking of doing a Shiva Driver (not sure on size) and a PE 250 amp. In a vented design. Room is 6000 sq ft 1 opening and it will be used in a 75% HT set up. Should i go sonotube or box, also i was thinking of a pyramid design since i am very egyptian themed and would like to keep that if possible but it's not a requirement. I tried reading the shiva build sheet thing and well it totally confused me...lol I need to figure out A. How big it has to be. B. How to vent it and where C. Size of Driver All in all i am looking for good deep base with out spending a whloe lot...i figure in all this should run me about 300.00 (thanks GeoffM for your help!) Thanks all in Advance!!!