i know this form may be old but that build looks real nice. i like the way you did the doors. looked at alot of tahoe /subs and it looks so simple and clean. will be useing this idea on my build wich is 4 fi sp4 18 on 6 batteries. just dont know what amps to run the subs on. box has been set at 29 hrz. though. this black dude gets down low.