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We don't discriminate here. Obviously this amp was made for the use of an iPod but it could also be easily used with any type of audio player using the standard 1/4-inch audio jack. The total cost is under $30 depending on what supplies you already have. The designer for this wanted a simple system that he could leave in his garage that would give good sound for his iPod but not cost him an arm and a leg. This isn t your 10-year-old's science fair project; it does take a little bit of electrical know-how.

Intro Simple Amp [instructables]