Summary: Got them recently and swapped them out with my NHT SB1s I was using. These are nice (The NHTs have a better sound though. They are not very efficient and are larger). Good sound. Nice, tight bass. I am hearing things in the music I did not hear before. Though I like them, I felt that they are a little overpriced. They work very well with a T-Amp I have.
Summary: I am totally disappointed with the sound coming from these so called 5 stars speakers. My mini amplifiers are Digital T-Amp (S.M.S.L SA-98E), FiiO A1, and cheap Lepai LP2020A+. I test the speakers with all the 3 amplifiers. Then I test the 3 amps with a pair of Polk Audio RM8 speakers, Klipsch quintet II series speakers. The Audio Engine speakers are the worst that I hear. Still do not believe my ears.
Summary: Hooked up to a Dac and my laptop these are fantastic for the price....good quality music reproduction, break in period is a definite necessity, since they've past the break in period the music is much more detailed and I can pick up nuances in the music that I didn't before hand....worth the cheap money....
Summary: I owned the a2's before deciding id rather have passive speakers/an amp, and I was very satisfied with them. I have the p4s paired with the n22 amp, which does a great job powering these speakers. They didn't have as much bass as I had expected, but the clarity and accuracy of them makes up for it. Plus I'm sure they created them assuming a sub woofer would be used anyway. As for build quality they look very polished and the hardware is immaculate.