I have two speakers outside. They come into the house with regular speaker wire. I want to plug them into the cradle for my toshiba thrive tablet and play pandora radio outside. The cradle only has a headphone jack but of course it does plug into the wall. I read some other posts and figured that the easiest way is to use an rca to 3.5 cable, cut off the rca and wire direct. My question is, will there be enough power to run the speakers or not.