I'm 5'6", I have my powered subwoofer under my driver seat, and my remote marine receiver under my passenger seat. The raised driver seat improves driver visibility in autocross where you need to be looking way down course, sometimes looking out the side windows to the next element. In autocross, you need to looking where you're going to be, not where you are. There is actually an advanced autocross class that tapes the lower half of your windshield off by setting a cone 50' in front of your car so you can't see anything closer!