What is the sub attached to?

When I had a sub mini attached to a Sonos Amp there was a crossover setting because the Amp uses external speakers so Sonos had no idea of the speakers capabilities.

I don’t recall seeing one when attached to other Sonos speakers because the capabilities of the speaker and sub are know so it is likely automatically set. If you can run TruePlay then that will also make further adjustments based on its algorithm.

The Sub is wirelessly connected with no amp or other audio devices connected. I’m familiar with True Play but was hoping there was something where I could define the crossover.