The changes i have told to do is remove the 2.2uf capacitor and replace it with one 0.15uf so to cut the frequencies below 20Hz like a subsonic-ruble filter.
I have a viny with such problems and saw the woofer jump without hearing anything.
What do you think about that?
Second, to put a 20R resistor in series at the output of the second stage opamp protecting from an accidentally sort circuit.
Is that a good idea?