YAST: Rebuilding cabinets

[Toastedlightly]

So, I have this old sony surround system. I am bored with it. It it alright for the price (100 bucks for amp, sub and 4 surround and 1 center), but I want better for cheap. Would building MDF cabinets for the 2.5" speakers help them at all?

All these other speaker threads got me into reading up on acoustics and a bunch of stuff. I smell and expensive hobby coming.