Converting balanced output from a DaySequerra tuner to unbalanced input for my preamp?

Hello, 

  So, I found a good deal on a used DaySequerra M4.2S HD tuner so I snapped it up. I now realize that it has only balanced XLR outputs and my preamp has all unbalanced RCA inputs and a balanced output to the amp. What is the best way for me to convert the balanced signal from the DaySequerra to the unbalanced input on my preamp?

  I noticed that Sweetwater sells some $79 boxes to do it but is that the best way to go?

  The DaySequerra is an experiment because my beloved McIntosh MR-78 is getting walked all over by strong nearby stations and even the DynaLab Signal Sleuth can't fix the problem. 

  Thanks for the help! 
  Larry