I used to have 3 JL audio 12s in my car. I decided to take them out becasue i needed a trunk after sitting in the closet for a year i have decided that I would liek to hook them up in my house. they bridged to 4 ohms. I believe i would need atleast 500 watts. My reciever is a sony GA7ES. Its an older model. Will i be able to get a quality amp for under $400?