Hey guys, i'm just wondering about an amp i bought secondhand, it says earthquake on the top and has PHd3 on the side of it. Also it has some stars on the right hand side of the earthquake logo (15 in total) and stripes on the right (5 in total) it has grey paint. I bought it for about $500 cause the guy said it was awesome for spl, i'm not sure how it will go power my mm120 sub. What do u guys think? is it powerful enough? i can't seem to find this amp on earthquakes web-site.