okay i am sure when i go to tune the box the size of the port will be different. the drawing is not to scale. its a rough sketch of the idea i have. from each box there will be an opening at the bottom and meet in the center.
nvm. i've decided to go with pvc port box. the slot port takes up too much space in the box. if i was to tune it to like 28hz or 30hz it needs to be long. that means it would take alot of space inside the box.
yeah like lilrob said. that port is too short to be tuned to around 30hz. thats why i am going with 2 3" diameter pvc pipe in each chamber. the slot port will reduce the cuft inside too much. a 3 cuft box will have just about little over 2 cuft after the slot port displacement and the driver displacement.
hey guys i just want to make sure of one thing. if i were to build a box with 2 3" pvc pipe ports, then i just calculate the port with a 6" diameter and take half of the length of that right? meaning 2 3" diameter by 13" length is same as 1 6" diameter by 26" length.
Yes the pros do it, but when u put more than one sub in one chamber the subs have to be playing exactly the same, if one falls behind or quits all together your gonna have problems. The reasons for keepin subs seperate far out weigh the resons not to.
lol do what u want bro, im just tellin u how it is. the quality doesnt really have ne thing to do with it. its hard to match subs that r in the same chamber. not only that but seperating them would add another brace. i could keep goin, but u obviously have your mind made up. good luck.
chad, dont calaculate that way or you will screw up your entire design lol. first of all, having 2 ports is different than having one in a single chamber. when you have 2 ports each one is tuned to half the volume of the chamber, or something like that. but 2 3 inch ports DO NOT equal 1 6 inch port. 2 3 inch ports have a port area of 14.13 cq inches. a single 6 inch port as a port area of 28.26 sq inches. so >4< 3 inch ports equal a single 6 inch port. to be honest i dont think 2 3 inch ports is large enough. id go with 2 4 inch ports, flared.
okay i'll calculate that in a minute. i thought u were doing 1 chamber and 2 3 inch ports. that would have been far off. if its for each chamber then 2 3 inch pports may be okay. a good rule of thumb is 10sq inches for every 1cuft but ive seen plenty of great installs who dont completely follow it. steve mead did an install for his wife with 2 12 MTs and 2 4 inch flared ports so that has to say something... but okay im going to calculate this now... im assuming you want 2.5net unless you say otherwise...