The way to calculate air space is WxHxD divided by 1728. If you want to cheat you go to www.rockfordfosgate.com they have a technical department that has a volume calculator where you just type in your measurements.
Eclipse CD5442 deck
SAVV 5.6" Monitor flushed into dash
SAVV 7' flip down monitor
JL Audio 500/1 for subs
JL Audio 300/2 for components
JL Audio XR525CX components
2 JL Audio 10w3v2 subs under backseat, Audio Control EQX
Sony Playstation 2, 2 Optima deep cycles, and too many things under the hood to list.
98 GMC Z-71 Extended Cab Vortec 5.7