jumbo
+1y
is your box ported or sealed? Do you have the right dimensions? Are the subs single voice coil or dual? Do you have it wired in series or parallel? There's lots of reasons it won't sound as good as it should, can you give some more specifics? Or it could be the amp is just old and does'nt push as much as it used to. I don't claim to be a expert by any means, but the slightest thing can make a huge difference in how it sounds. Where are the subs facing? Lots of people don't know that bass loads against something solid, so if the subs are forward facing, the bass goes through the seat, you, then loads against the windshield. My subs in my s10 were pointed at the floor and hit hella hard. I know this does'nt help that much, but just letting you know that it could be one or more of many different variables. I'd like to hear what others think of this, because i'm also going to be putting 4 12's in my burban.