The 600 Watt are just "marketing Watt", the RMS power - ie, to which you should pay more, not enough for this constellation of unfortunately. The sound of the boxes goes for voice in order for einspielbare music through the AUX / CD inputs missing the pit volume (resp. Bass).
For me, a bad buy. Due to a review I had thought that it would be enough for the speeches, but for me, unfortunately, not the case. In enclosed spaces, it may be enough.
My conclusion: the price is okay, processing is OK, the sound for voice as well, but there is little "steam". Therefore, more for children's.