Even before entering to high end audio stuff and car modding , the normal audio installation which i did years back one had to fix sony mono and xplod sub and found them good, even a thread lies here about that.
later on over the year , still wanting for the crystal clear audios , landed in modding job and it helped to explore .
you will change your ideas when you hear with good head unit , well proportioned boxed and subwoofers like idq , alpine , rf etc plus a great matching amp will surely blow your mind!
Entry level , any day the jbl has a edge over the xplod. with both almost equal!