Re: tweeter location
I have my tweeters at the bottom of the A pillar kind of facing the window and pointing towards the opposite side of the truck. That way they bounce off the window. I like them there and feel its a better spot then having them at the top of the A pillar right in your ear. Also if you already have 6.5s in the rear just keep them for the slight rear fill. I have 5 1/4s behind me and find that the truck is full of sound. I have a single cab though.
HU: Kenwood KDC-X993
Front stage: (2x) Shok CB 6.5
Comp amp: Crescendo 1000c4
Sub stage: (2) AQ HDC3 10s in 2.3 cuft @ 38hz
sub amp: Crescendo 3kw
Electrical: Mike Singer 250a alt w/ext regulator, D3100, NSB100, D680, 50ft of shok cca
149.5 @ 39hz and climbing...
Plenty of refs between here and caco....