suggest XLR balanced to RCA hardware?

I'm running two soundsystems in my apartment from a DJ mixer. One system is currently running via a really long RCA cord to the other room. I would like to utilize the XLR out on my mixer, but my integrated amp is RCA in only. I was wondering if someone could recommend a piece of hardware that would be appropriate for keeping a balanced signal over a long distance (so balanced XLR ins) with an RCA output (a short cable to go to my integrated amp). Right now I don't even know what such a device is called. I'm looking for a solid piece of equipment, but nothing too expensive (<$150 if possible).