Warn Sound Capacitor

It might not be a bad idea to know the rest of the circuit?

Is there a resistor in series or parallel after the capacitor shunt, and do you know the value?
I don't want to suggest shunting more energy to ground as I'm not wanting to kill your amplifier :-)
if you don't know what you're doing?

@audio4pass

 i know what i do ;)no resistor in tw circuit only 12db/oct so one cap in series and ind in parallel

https://systems.audiogon.com/systems/8721

I have two set of crossovers in my photos.
What you can't see in the photos is the tuning bay in the underside, the back of the speaker.

While measuring, a variable resistor in parallel with the resistor in the circuit is used to tune either drivers one at a time, you could try running wires out through your port (if you have one?) and tune your tweeter energy, in parallel to the cap as your moniker image circuit diagram is.

If you've already thought of that, which it seems you may have.
I used Superior Z-Cap (two in parallel for one circuit to make the correct value) with a Duelund Capacitor 0.01uF 600Vdc Silver (Ag) Foil & Wax/Oil Precision BYPASS Cap. I found this to be a good sounding combination and much cheaper than using a Duelund VSF of the same value.

All the best.