I have a do sp4 reconed by psi. It's fully upgraded to 3000 rms. I've got a saz 3500 pushing it. The box is up firing and I have so much roof flex. What are a few ways to stop flexing? I can hear a poping sound in the roof. I know thats brace is probably the best thing to do but I'd like to avoid that if possible. Just trying to get some thoughts on what I can do to reinforce the roof. Thanks
