RF amp

Perry’s idea is a good one and I would try it first

However this may be an alternative, How hard would it be to desolder one vertical board at a time? This may be a way to narrow done the defective component to one board and once the board is isolated and removed from main board,apply the technique I recommended in previous post.

I'm not familiar with the layout of this amp and most Kicker amps have the x-over on a separate plug in board. Although, I've had to go through multiple op-amp chips to find a failed chip.Tedious and time consuming but with a little patient and care can be done.