A yes i have 2 kicker 12 inch l7s with a ported box but its only like 1.5 cubes perchamber, im stepping up to a 3.0 cubes each chamber and ports tuned to 35hrz, will this effect the bass output and add way more lower louder bass just from the change of the box?? the demensions will be 42"x21"x20" also is the lower the port tuning the more bass< and how does that work but tuning the ports??? The box i have now just really doesnt seem to be very loud, its alright but its also a ebay prefab box. This new one will be a big box well for a camaro at least it will!!