Can someone explain how to find the square inch per cubic feet when designing port?

[Triticum Agricolam]

Using Small's port area formula you would want 20.25 sq in of port for this driver at 35 Hz. If you use a well flared/aero port you could probably cut that back to closer to 16 sq in. I would suggest you use the 3.5" wide port for greater port area.

[osiris10012]

Looks like I need to start redesigning my enclosure. Thanks for the advise. I am also considering doing a forward firing port and sub, but until I get the sub in hand to measure the actual size of the magnet I don't know if I can make it work. Also am I doing the additional port length correctly by adding half of the width (3.5) to the length for the 90 degree bend?

[osiris10012]

Edit: accidental double post

[Krakin]

Using Small's port area formula you would want 20.25 sq in of port for this driver at 35 Hz. If you use a well flared/aero port you could probably cut that back to closer to 16 sq in. I would suggest you use the 3.5" wide port for greater port area.

Remember that the paper suggests having a reasonable amount of flaring along with the area.

[Triticum Agricolam]

Using Small's port area formula you would want 20.25 sq in of port for this driver at 35 Hz. If you use a well flared/aero port you could probably cut that back to closer to 16 sq in. I would suggest you use the 3.5" wide port for greater port area.

Remember that the paper suggests having a reasonable amount of flaring along with the area.

Yeah I wish I knew what exactly a "reasonable radius" was that he was referring to in that paper. I would guess its like a 1/4", with fully flared slot ports I try for a flare radius equal to the width of the port.

[osiris10012]

When you guys are referring to flaring the port, do you mean make the opening kind of like a flared aero port, but with the slot port? If so how would you determine how much flaring you would need?

[Triticum Agricolam]

When you guys are referring to flaring the port, do you mean make the opening kind of like a flared aero port, but with the slot port? If so how would you determine how much flaring you would need?

Yeah it's kinda like an aero port. When I am going to only be flaring one side, like on a box with the port against the side, I make the flare radius the same as the port width. If the port is in the middle of the box so both sides will be flared I make the flare radius 5/8 to 3/4 of the width of the port.

[Krakin]

woopisie wrong thread lol.

[CleanSierra]

^^just positive to positive, negative to negative right? Is that what I'm seeing?

[Joe X]

This is the wiring diagram for an opposing dual woofer enclosure that was posted:

???

http://www.stevemeadedesigns.com/board/topic/179470-looking-for-help-designing-a-enclosure-for-2-10-for-home-use/