Reply to thread

Re: B&C Sub designs

It looks big to me but let me show you how i got that 7" opening...

339 sq cm is equal to 133.465 sq in.

One side of the opening is 21" so I did the division 133.465" / 21"= 6.35"

Giving me a port area of 21" by 6.35"

Is this right?

All the freeware in the world is for PC...