I would like to build a box strictly to burp with, the so called "fart box" but I don't know how to design one. Is there a trick to designing it? I see that the port is external to the box. Is that a sealed box ported? I need help please. Maybe someone could design one and explain. I got PayPal.
This is for two DD 1508s in a '97 Accord.
Max dims are