Roon’s DSP Volume - Starting safe

My roon setup is core and endpoint in one music server.
I would like to try the roon dsp volume control, just because I am curious :blush:

My speakers are 96db and my amp 300w, so I need to set a safe limit before I connect my dac to my amp.

Playing very load is around 30 on my pre-amp. Around 15 is my preferred level

Speakers Tekton Double Impact
Dac Holo Audio May KTE
Amp PS Audio BHK 250
pre PS Audio BHK Signature
Connection XLR balanced