Anyone on here have a Yamaha EMX512SC? I'd like to know what speaker cables I need for the powered mixer. The only powered mixer I've had used the 1/4" phone jacks. I think the Yamaha uses the speak-on. I'm not sure what I need to look for. Are all of them the same or do some have different wiring or polarities? A link from Guitar Center or Musician's Friend would be helpful. Thanks for any input.