You could always try the Audioengine N22 and if you dont like it send it back.
AudioEngine A5 Mini Amp
Hey, I recently got some AudioEngine A5's for free becasue the internal amp was shot. I was able to convert them into passive speakers and now want to use a mini amp to use them easily on my desk. It looks like they are 45 W RMS, 70 W peak, and 10 ohm impedance. Any help would be awsome!!