Dumb blonde needs help with power cable matching to subwoofer

Use a power cord that you would use in your home tower computer. It has a male plug at one end and a female at the other. It is a 3 prong plug.

It cracks me up that, as in most threads, nobody reads the actual 1st post by the author. 

She said;  "Hi! I have a buyer here for my late husband's Rythmik Audio Direct Servo Sealed F12 Subwoofer and I need to know what power cord goes with it."

She had a buyer there when she asked the question. Any answers after MC, Russ and mine would be moot.