I had these in my Monte SS years ago and in my Camaro for a little while. I dont know what subs they are exactly but I had a 1000 watt amp to drive em. They were bad ***. I can take them out of the box to get specs if you want. Bought from BrynMawr Stereo and Video before they became "Tweeter". The amp is long gone and the box and subs have been wrapped in a plastic bag in my garage for a few years. Paid over $500 for them new many moons ago... Come and get em. Just make me a reasonable offer of $50 or so at they are yours.