I have a Kenwood KAC-8105D amp and I want to put two shallow 8" subs in my Tundra, but I don't know the best place to mount the amp. I took the panel off behind the rear seats thinking I could cut it and mount it in the slot back there and I see that the factory JBL amp is back there too. So where is the best place, and having two amps is fine isn't it?