[help] Making my own cabinets and head amplifiers

[Aero]

I'm gonna start with 2 more friends our own project, It's about making cabinets, speakers, etc etc etc and maybe in the future an amp head.

My 2 friends are Sound Engeniers so they know alot, but I'm a fucking rookie and I'd like to learn a little, just to understand what the fuck are they talking about.

Is there any internet sources to learn some electronic, acoustic, etc etc oriented to sound???

like... what to consider when you design a cabinet, or the basics to read an amp scheme sheet, etc etc etc

thank you guys very much in advance

[Aero]

ok I already found LOTS of info 

thanks anyways