I'm not sure if this is the best place for this, but I'm wanting to put 4 outdoor speakers on my patio. I've got a couple of ideas for speakers, but my main problem is how to power them. I plan on putting the receiver inside and running the wires to the outside. What receiver should I look into for playng 4 speakers at the same time? I'm not even sure where to look for a 4 channel receiver. Thanks for the help.