I thought about building me a subwoofers for home theater. and I've looked at this Dayton TIT400C-4 15 "Titanic Mk III Subwoofer.är it a good choice for the size room 11x22 feet, or is it better with a smaller woofer my front speakers is yamaha ns-777 ns-444
A sub has to move lots of air for the low frequency demands of home theater, a 15" sub would be a good choice for your room size. Do you have a box size and tuning picked out? What amp will you be using?
10 cu.ft. tuned to 18 hz will give you an excellent HT experience watching movies. Porting would need to be 6" diameter and 19" long to keep the port air speed acceptable. This model is with the HPSA Amp with 2 db of boost at 20 hz. The same results can be had with the Bash 500 if you change the Hi-Pass filter by soldering in 2 different resistors.
Or couldn't you just switch the fuse in the amp around? Someone had called Dayton or PE and they said that with flipping the fuse around 180 degrees, it could handle 240v or something. Before you try this, I suggest that you call PE or Dayton and confirm this. If you can't call them, just forget I even said this haha and don't attempt this.