I want to give friends of mine a set of outdoor speakers for their rather large backyard that is around an acre in size. I am looking at these speakers from Radio Shack: http://www.radioshack.com/product.as...t%5Fid=40-4102 A few questions.... 1. Are these the type of speakers that will play LOUD? Can it fill a good portion of the backyard with audio? 2. Can these speakers easily be blown if audio level is turned up too loud? Any suggestions for slightly better outdoor speakers that I can buy quickly at about the same price? Thanks in advance for your help.