Hi, I'm going to build my sub soon I hope (i've been wiating about 5 months! ). I was just thinking over the construction detials of the sealed box. I'm thinking it might be a bit to hard to do a 230L box. I would have to cut out 18 4" holes and cut all the boards to the exact size and glue and clamp everything down. I'm also thinking about makeing a vented sonosub for movies. It would be kinda hard to fit a huge sealed sub in the same corner as a sonosub. So would it be a very good idea to make a 230L sealed sonotube for music. Then make a 230L vented sonosub for movies. I would have them on a speaker switch or something. Tell me what you Think. Ryan P.S. does sonosubs sound much diffrent then regular boxes made from MDF?