Capacitor rating for NFB Cap

[Xander8280]

Thinking of throwing a tone stack in my NFB loop of my jcm to control some tonality after the phase inverter.
Is this going to throw the impedance off that bad? I don't care about tube life, I just care about transformer failure if that would even happen...

Thanks guys

[tubeswell]

No harm to the OT

[pdf64]

Bear in mind that the controls will work opposite to what you would expect if they were outside of a NFB loop, ie if wired as normal, as say treble is turned clockwise, the treble level will tend to decrease.

[roberto]

Place a baxandall before the PI, will work better.