Assuming you will be using the 3.5mm speaker output and one of those adapter cables to convert it into two RCA plugs, virtually any amplifier of receiver will provide juice to those two speakers. This adapter works great with MP3 players and portable CD players, too
Of course, a lot depends on what you want to spend for a,plification.
If you have an old receiver lying around the house, draft it into service. Look for a working vintage integrated amp or receiver in garage sales. J & R sells a little Sherwood stereo receiver, new in box with full warranty, for less than $100 that will work just fine.
As for this: I think someone's got it backwards. You need to worry about too STRONG a signal.