I had ssackett build me some 10"s last winter and after only using them a few months and then having them sit around all summer ive decided to sell them. They sounded fantastic and hit the low notes incredibly well. He rated them at 1500rms a piece but im sure they can take a bit more since the cone i couldnt even get the cones to get warm. They are dual 4. It cost me about $500 for the pair so im gonna ask a modest $400 for the pair and i will split shipping with the buyer. Contact me for more info.