I'm looking for plans, preferably on the net, for a big combo, I was thinking of having 2 10" drivers and 2 14" drivers in a big cabinet with an amplifier packed away in the top. I want it to be powerful. Is there anywhere on the internet that has plans for building an amp, or maybe just a wiring diagram for an amp. Also what is the equation for the volume of space in a cab in relation to the size and power of the drivers? Thanks in advance. PS. I'm hopefully gonna do this for my A-Level project next year.