all those plastic prefab kick panels are junk and arent worth the plastic they are made of, to get them to work even marginally well you would have to spend a bunch of time and money. the only way i ever got a pair to ever work good, actualluy the only pair i ever tried, i mixed lead shot woth resin and applied it to the backside of the panel to try to eliminate the frightening amount of flex and resonance those pieces of poop gererated, learn something and build your own, not only will you become a better installer, even if you butcher you 1st set mamking them, its likely they will sound better than the plastic ones