Hey guys. I've been doing a lot of research lately and it seems that the more I read, the more I want to learn about subwoofers and how they truly work. Most people know the general guidelines about how a subwoofer actually works, but I've been getting into the tiny details about what makes everything the way it is, or do whatever it does. I've started watching a lot of videos and I've done a few recones of my own, but I think it'd actually be cool to get into the business of building, and possibly even selling, subwoofers. I know there are guys like @SPLaudio out there who have been doing it for a while, and I was just wondering how everything goes from top to bottom. How'd you get into the business? Where do you order parts like spiders, terminals, baskets, magnets, or even your own custom dustcaps? How can you tell where a sub's RMS rating is at? What's the difference between a 2 ohm coil and a 4 ohm coil? I've just got a bunch of questions like this for any of you builders who have started building and selling your own subwoofers. SPL is only one of many people who build on here, so if any vendors or anybody else who simply knows anything about building can chime in, it'd be awesome! Thanks everybody!