I need to purchase a amplifier for my speakers, but don’t know what to look for or how much I should spend. Let me explain what I am trying to accomplish, I have a set of speakers outside by my pool. They are made to look like rocks and fit in very well with there surroundings. I want to be able to play music from my PC on them, I know I need a amplifier to boost the signal from the computer. Now I know that the speakers are either 100W or 50W each. The distance the wires would need to travel would be between 100-175 feet. I went to six avenue electronics and the guy told me I would need a $800 amplifier, this sounds like a rip-off . Can someone give me some guidance as to what type of amplifier I would need, and maybe a good location to buy it. Not going back to Sixth Avenue again :a . Thank you for the help.