There isn't much out there for the newby DIYer, and that's a big departure from 10-20 years ago. That because there was a lot of experimentation going on then in speaker design, but precious little now.

I write for AudioXpress magazine, which on average has two speaker projects per issue. That's a far cry from its pre-2001 predecessor, Speaker Builder, which during its late '80s early 90's heyday often had four or five projects per issue. The reason for the current lack of projects? A lack of people writing them.

If you're serious about DIY go to the AudioXpress site and see about getting back issues of Speaker Builder, most especially 1985 to 1990 or so. Most of what is considered cutting edge speaker technology today in fact appeared in Speaker Builder during that time period coming out of the home work shops of both professional and amateur builders.