chances are that it was the box. eclipses are a little sensitive to what box they are in. you have to take the whole install into mind when dealing with different subs and boxes.Originally posted by MA_Boomin' Heard both set ups in a 96 Mustang sealed box on both running off a Directed Audio 800 Watt amp. Tens were much crisper and as loud if not louder than the 12. I was actually a little disappointed in the one twelve, but it could have used a better box too, IMO.