Ballpark

You extend wire from speaker what ever you want distance.

There are a couple of ways you could do this. One way is to buy some do-it-yourself connectors (RCA or 1/4", depending on the type of output jacks on your PA) and solder them to the bare-wire that you already have running to your speakers. That will create a good connection for you with minimal loss and minimal distortion. The other option is to purchase 1/4" instument cables from a music store, like guitar center, and cut one end off. Strip back the wire casing and connect directly to your speaker inputs.

Hope this helped.