Reply to Cables, controllers, etc

Hello... Im new to the DJ world..even though I try to keep up..every minute...My concern is that I bought the Reloop Dj Interface DJ controller(soundcard included) and the KRK ROKIT 5 studio monitor. I dont have the controller with me yet, but I have the Berinhger BCD3000, I bought it just to try to control basic stuff, beat matching, just the get the look and feel. I tried to test the monitor with this controller, but it seems I can't get like the sound quality, they I really want (the monitor is in mint condition, no problems at all). Since the controller has 2 rca outputs and the monitors has the options of Unbalanced RCA,Balanced 1/4" TRS, Balanced XLR,which would be the best option once the Reloop controller arrives. I tried to see if I can get hold of a dual rca to XLR male. But most of them are from Single RCA to XRL. Any suggestions. Also the bass on the monitor is limited.. I read in a blog that if you only have one of these, the bass is not as much as loud.