DIY gives music lovers and audiophiles the ultimate power. First of all, DIY speakers use the same parts, building materials (usually), and design techniques of HiFi speakers in the 4 and 5-figure range. This means you can have that "rich" sound at a fraction of the retail cost. Second, by learning the science behind the design of loudspeakers, a lot of the mysticism and mythology that plagues the audiophile world becomes dispelled, and you learn what is important--and what is irrelevant--in exceptional sound reproduction.
Everything here is free. I am a lifelong speaker addict, and this is my contribution to the audio world.