By Oscar Sanchez Jr
Yngwie J. Malmsteen
So you wanna learn to design speakers huh? Well I can't help you with every single aspect, but what I can do is lay down the basics to the not-so-basics. What I do know plenty about (at least I think so) is subwoofers and general low-frequency enclosure designing. I'll try to post as much information as I can remember, quoting my sources as necessary. Below you'll find links to the various types of enclosures that I know how to design in which you can find lots of useful info for designing them.
4. Parallel-Tuned Dual Reflex Bandpass