yeah I probably should have given you my system information anyway I have a 6000watt rms amp at 1 ohm and Im going to run it at .7 and right now I have a mechman 250 amp alt with a 3400d upfront and 2 stinger 1700's in the back along with 2 stinger 680's on the other side now Im thinking about switching the 680's for the powermaster 680's would but would it be worth it I mean I need every little bit of extra juice I can get and if the powermaster 680's are better then I will go with them or I could go with the powermaster 1200 as well but I cant fit anything much bigger than that cause Im out of room