sound system

hey guys, i have a factory sub in my 09 KR, and would like a little more boom like everyone i would like to save money for other stuff too... has anyone attempted to build their own enclosure? pics or a guide would be much appreciated

I am interested in trading my Early 99 F350 Turbo Diesel. It is a 2wd regular cab with dual rear wheels. It has many upgrades such as a terminator T500 HPOP, a Tony Wildman tuned chip with Economy, street, heavy tow, Extreme, Hi-Idle, and stock tunes. It has a 4" downpipe which is not connected...

i am looking to upgrade the sound system in my 08 crew cab, but i DEFINATELY want to stick with the stock head unit. i found an adapter online somewhere to let me put a sub and amp on the stock headunit. i was looking at infinity kappa speakers. can i just swap these out? or do the speakers...