So, this VXF 15 is on a SIA-3500 at 1 ohm. I saved these box files as a "high powered" box, which is because I usually design boxes for RMS power, typically. This box is tuned in the high 20's and has big port area, relative to musical design, Skar's recommendation, and what I would normally do for port area for a sub like this. I can't believe this sub hasn't blown yet, honestly. That's like legit 2x the RMS power.
These big flared ports are not just for show. Don't get me wrong, I think they look super cool, but giant flares are very useful in high power applications, or in applications where you might run into port noise. It's the exact same concept as a the flared ends on something like a PSP aeroport, but clearly it's a whole level higher of beefiness and airflow.
I'm really not a fan of aeros, when it comes down to it. They definitely have their uses, but wooden ports are so strong and make the box so much stronger, as well, and you just aren't going to get the same airflow, in most cases, by using a round or aeroport. I don't think there's many ports that can beat the airflow of a flared slot port.
