does DIY mean you just buy the amp, buy the driver, and build a box and put it all in? At first i was thinking DIY meant actually designing and building the amplifier too. So i guess the question is, do you have to know anything about speakers to build your own sub (apart from what people on this forum tell you)? It seems wood working skills are more important. How hard is it to build a box? Does it need to be perfectly airtight? Is there special wood that is used?