I have 2 12 cvrs in a dual ported box (seperated chambers) tuned at 38 hz. The box is only about 1.8 cubic feet per chamber. I think my box is giving off a port noise. Someone mentioned this to me before, and i want to figure out if that is the problem.
If your box is makeing noise then you need a new box because something came loose. But if that happens you will notice a distinct sound will come from the port kinda like (simply put) 2 pieces of MDF vibrating together, or it could be a air leak in your seams.
ports are slotted.....the box is brand new....is sealed really well on the inside. Would i be able to notice by looking at it if 2 pieces of mdf were vibrating together?
I remember when i made 1 slotted enclosure for 1 of my cvrs i was powering it with alot of power and my port wall came loose and was making a loud weird annoying noise so that might be the problem.
if a slot port doesnt have enough surface area, it will have turbulance within the port and sound like a plastic bad crackling, i think thats what he wants to know, its because too much air is trying to come out of a small area and it bounces off the walls and then varies in diretion a little