I bought this Alpine amplifier so I could run my 12 inch subwoofer at one ohm-which it runs at one ohm but it does not run steady at one ohm so I had to buy the Alpine S2-A60M which is the exact same amp but it will run steady at one ohm-I literally had this amplifier in my car for two weeks but I had it under my seat so there’s a couple little blemishes where it moved around a little-Great Condition!!