The sound was fantastic at first but after they break-in the sound became epic! I use two sets and I don't think there is a better sounding Mustang for less $. The thing with Diamond is that they make power hungry speakers, they say 60w rms but I say at least 100w rms but they must be gently broke-in . Don't think about powering these with your head unit. If you don't use amps; I recommend you stay away.
Pros: Unbeatable for the price.
Cons: Not for everyone.