Thats the problem cause im only new with this DIY project. i just bought it on a trift shop. i search it on the internet but i dont see any specs for it, the only thing i know is its a atomic subwoofer which says on the label and 500watts in 8 ohms. sorry guys i cant give you a spec for this. but a help will do on how can i check the spec for this sub? thanks a lot guys!