Hi. How are you. This is my first post. I bought the Yorkville Excursion 2000 set up for my buddy to use for gigs. He hasn't used them much so I brought them to my house. I'd like to find a simple interface so I can listen to them at home. It must have two midi outputs to plug in the subwoofer. I only need one input for my ipad (8th inch). What's a good, cheap option that will keep nice sound quality for these speakers? Thanks...