12 inch shallow mount subwoofer - 12 inch shallow subwoofer - shallow mount 12

There are many subwoofer in the market but which one is good? Lets see.  There are several types of subs. But we have 12 inch shallow mount subwoofer to find the good one. At first we have to take the branded subs in our list. Then we have to see which subs are made with good material.