I have a pair of 31 band mono eqs for my truck and the problem with them is the power supply. The power supply makes noise that passes through them into my amps. Is there a way to filter the power supply and if not could someone post me a schematic for a 14.4 volt power supply. I dont know much about power supplys but I can follow a schematic. I dun know if this makes a difference but the power supply is 11 to 15 volts dc input and a regulated 14.4 output with positive and negative outputs.If anyone has any suggestions please post them. I couls make a schematic of the power supplys they currently have if it would help to solve my problem. Any help would be appreciated.Thanx.