Originally Posted by smileyj
Im looking to put in 4 sundown sa 12's but I do not have a clue how to build a box for them. Any advice/help would be great
id suggest either posting here Box Requests - Car Audio Classifieds!
or go to caraudio.com and go here https://www.caraudio.com/forums/10-subwoofers/
and tag @shredder2. He builds box blueprints for a resonabel price and trust me when i say that youll get many responses giving you advice on what to do. Some things youll want to include both here or there are the care youre putting it in, the dimensions you have to work with, the power youre going to be putting to them(probably want to include the model #s of the amps youre going to be using) and the type of music you usually listen to. Youre most likely going to get ported suggestions any way you go, and those things get big esp for 4 12"s. Youll also probably get recommendations to do 3 15"s instead as the surface area of 3 15s is 529.875 sq/in vs 4 12s of 452.16. Anyways, there is a lot to consider is what im trying to say lol