I have installed an American Bass XFL 12 dual 2 ohm sub in a ported box being ran by a D4S MM1500KFD. The sub has wire leads instead of terminals. I wired the leads together then ran that connection to the amp basically in a Y configuration. I tested the ohm load and it came in at 2 ohms. I’m not sure how to wire it to get a 1 ohm load. Any help would be greatly appreciated.