I have a Rockford Fosgate Prime R500-1 and a sa-8 in a .8ft^3 at 34hz and it sounds nice this thing pounds out more bass then I need when I lising to rap and stuf with a lot of bass but win I lising to pink floyd or styx ther is not so mutch bass this is my first ported box I like seald box's better so my ? is if I get a sa-12 and put it in 1.25cf seald with 500 wats going to it how will it campare to what I have now this will go in the back of a 2006 equinox hear is a pic of my box on the ca.com site http://www.caraudio.com/forums/enclosure-design-construction-help/512899-what-do-you-think-my-box.html

You will have a flatter overall response with the SA-12 sealed.

Of course Pink Floyd and Styx don't really have a ton of bass to being with -- so you'll need to use the sub control on your HU or amp remote gain knob to boost those songs up.