My box is around 10.4 cubes for two Zv4 15. Power is a saz 5000D. I am going to be using a 12" round port. How long would it need to be to get the tuning in the low 30's? I forgot to say the subs are inverted so very little displacement if any.
As far as I know if the port is longer than 20" or shorter than 10" there is problem with your port area!!!
Extreme tunings will break this guideline but it will generally be the place to start and see what is in a decent efficiency range. Super short ports for high tunings for pure SPL do well and my 35" cannon isn't bad for the 23hz tune I getting out of it....lol
2 Ampere 3.0v2 18's
BC5500 at half ohm
Mark Antony gs380.4
Team SPL Farms
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