The amp was mounted behind the rear seats. It's been there five years and never had a problem. Just a low entry level system but it hits good enough for me.Is your Accord a coupe or sedan? If it is a coupe I can tell you that you won't be able to get an amp under the seats. The air ducts for the rear actually come out from under the two front seats in the coupe leaving no room for anything under it. You will want to deaden it pretty well too. You will discover a lot of new rattles in it that weren't there before. But a great car nonetheless to start out with. What I had prior to my car now