I've got an old ford with standard cassette player and speakers. I was thinking of buying a new head unit (one which with USB intake and AUX line) along with an active sub (I'm not too clued up on sound systems wiring...etc, so I thought an active sub would do the trick). Thing is, I've only got 2 standard front speakers, would it be enough to buy a head unit and stick the sub in the boot? I was looking to buy this Sony headunit (£70) along with an active sub for about £100 (from halfords). I'm still a student, so unfortunatly I don't have tons of cash to spend. Just wanted to get an opinion from anyone a bit more knowledgable about ICE on the headunit and sub.