Hey guys. Recently purchased a thunderform box for my silverado which takes up pretty much all the room under the rear seats. I have a sub amp in place where it is supposed to be in the thunderform box. Also wanted to mount a 4 channel amp somewhere and keep the rear seats. What is the best location or most used for a 4 channel amp. Was thinking behind the rear seats but not sure how much room is available. Sub amp fits just fine in the box and clears the seats but i'm stuck on where to mount the 4 channel. Thanks.