Guys, just want to ask if you compute your speaker box sizes with regards to the impedance of the speakers/subs? Dito din kasi nagkakatalo, pag wala sa measurement kahit ganu kaganda speaker di din gaganda tunog? And maganda daw four way na pioneer 6x9 meron na ba dito sa pinas nun? Ang lutong ng bigay pag tumunog?
There was a free speaker enclosure calculator that you can download on the Internet. I don't know if this is still free or downloadable, but it's more than suffice to answer your questions.