I have my full range amp mounted under my drivers seat hooked to a 20 amp OEM circuit, grounds and all. I have to disagree with it being a bad spot to mount electronics if it is done right. The best (and most obvious) advantage to mounting under a seat is its virtually theft proof. The only possible way to remove that amp is removing the entire drivers seat which is quite heavy and requires specialty tools. I have a sliding seat but i mounted the amp in such a way that everything clears and its not possible to kick from the back. In fact you can only see a very small portion from the side on the drivers side, and only about 1" of wires if I lift the carpet flap up (shown in pic) I agree with turboCAD and think it has more to do with how the install is approached and executed rather than just stereotyping that area as a poor electronics mounting location. It also has a lot to do with the model of car, mine worked out perfect due to the low mounted sports car seats. My amp has been fine there since I bought the car, but I really don't eat in my car and spill food and garbage everywhere. I keep my car detailed inside and out as much as possible.
