09-12-2006, 05:14 PM
Don't get a bigger sub because it is only $25 more..... get it because it fits the kind of music you are going to listen to. For him to build a ported box for that 12" it would need to be quite a bit larger than a ported box for the 10". With space kind of at a premium in a truck, the 10" will more than suffice. There would not be that big of a difference anyway. 10's are the way to go.