No doubt, the sound from this micro system is very good to excellent considering the size of the speakers and the price .... Radio reception depends greatly on the position of the antenna: no need to blame the radio tuner; just find the right placement of the antenna, horizontally if possible and away from other cables. Not always easy in an apartment it is true.
Certainly the speaker cables are short (about 1.50m) but you can lengthen worry: the cable end to be inserted next speaker is THAT tinned wire. So just make an extension cord with the speaker cable (it is readily available at computer stores HiFi) and to do so to use a good old domino electric cable, to strip one end of the cable and the tinned with a soldering iron (if one does not have, an electrician should be able to do).