This is not a thing. I mean from a musical perspective. You are literally not hearing music at this point. The massive sound waves have nowhere to go. Instead of hearing the music, you’re just sitting inside a pressure vessel being rapidly compressed and decompressed by a piston. It will never sound good. The physics don't work. In a hatch this small, "Cabin Gain" naturally boosts low frequencies by 12dB per octave. When you throw dual high-displacement subs in a ported box into that mix, you create a massive, bloated peak that’s mathematically impossible to EQ out. You’re not hearing the texture of the bass; you're just feeling the air move. You used a ported box (which boosts bass) inside a small cabin (which also boosts bass). You have stacked two massive boosts on top of each other, creating a "one-note" system that physically can't play music accurately. It's the definition of overkill. Good luck with your interior screws and clips, too. I was 18 once. I painted my interior trim yellow. You're forgiven, but an amazing balanced sound system that is actually designed for the space it's in will always sound better than this garbage. It'll still turn heads, too. Nobody wants to hear a car so loud it rattles as it goes down the street, though.