This is what I'm doing through a teflon cap inside my 20.6 monobloks. As a fact I received several improvements because I only change/replace the ML input cap for a way better and lower value/uf teflon/Cu cap along a resistor replace for a top TX2575 Z-foil one that gives me the high pass frequency I need it: around 80hz. I don't have to add any passive device only replace the ones I need to.
In my case was a : " win to win ".
R.