I suggest you take the crossover out of the box and build a separate box for the crossover to eliminate vibration.
Upgrade the main wiring from the crossover to all drivers and use larger gauges than what is currently there.
Reinforce the box to whatever extent is possible. The front face ideally will be “like a rock” - solid and inert.
You be dancing with the delightful improvements from these upgrades.
Good luck on this exciting journey and feel free to ask questions :) Pete
Upgrade the main wiring from the crossover to all drivers and use larger gauges than what is currently there.
Reinforce the box to whatever extent is possible. The front face ideally will be “like a rock” - solid and inert.
You be dancing with the delightful improvements from these upgrades.
Good luck on this exciting journey and feel free to ask questions :) Pete