I bought this sub because I was on a tight budget. I didn't expect much but I put this thing in a 1.3 cubic foot box ported tuned to 38 hz and it pounds. the sound quality is awful but hey its only 65 bucks. it is definitely not even close to the rms it says it can handle. I can smell the voice coils burning with about 450 RMS. Good sub for the price tho. in a trunk i think this would sound fine but not so much in an suv like i have the sound quality just isnt there. if your looking for some bass and dont have much money buy this thing but i dont recomend running over 500 rms to it.