I know the zcon is a beast ive seen videos so I know it gets very loud. And I have not specifically found a sub to compare it with I'm just looking for ideas. But I don't know how good it sounds because its impossible to determine sound quality from a vid. So basically I'm wondering if they are accurate and get low. And I know it will depend on the box. But some subs will just not sound good in any box. Oh and the subs I've had experience with are ssa dcons and they were really good for such a low price. And some 2 400 watt Kenwood 12s. Don't remember the model. A friend of mine has some rf 15's and they sound awesome but idk exactly what they are