I just got my new MM1040svc's and Im installing them in a 1996 Chevy Silverado extended cab with an Eclipse CD5100 Headunit, Kicker DS6.5 Front Speakers, Polk MOMO4x6 Back speakers. The box is a downfireing and vortex lined(Smooth Rhino Liner) with a kicker zx750.1 amp and 4Guage Wireing. The high end speakers are plenty loud for me, but im worried the subs arent going to hit hard enough. I will be installing them friday night so if anyone has any suggestions about how or tips, anythings welcome.