A speaker enclosure, or speaker box, can enhance the low end frequencies of speakers if it is properly sized and built. Speaker manufacturers will provide the necessary information within the owner’s manual to construct such a box. The box’s port can be almost any shape; typically builders use PVC piping to create these systems, so they are generally round. Sizing the diameter and length of the pipe involves a complex math equation. If you have the required information on hand you can use a online calculator to do the hard work. http://www.carstereo.com/help/Articles.cfm?id=31 Writer Bio
