Adjust SAM Level?

[Jean-Marie]

I have these clicks as well on some music if I set SAM to 100% (e.g. Malia & Boris Blank / Turners Ship).
The reason for these clicks is the speaker protection from SAM. It avoids excursions above a given limit which is causing these "clicks". Dialing SAM back to <70% is fixing this for me.
So it's not a bug but a feature.

Regarding high pass: I tried this as well, especially to integrate a subwoofer, but the high pass is already reducing the level above the defined value. e.g. if you set it to 16Hz even at 30 or 40 Hz the bass volume is reduced which sucks out some energy. I have given up on using the high pass.

A second order high pass at 16Hz will be at -3dB at 16Hz and around -1dB at 32Hz. 
You might be able to hear -1dB, personally I could not and it did not have any adverse effect that I could notice. 
But, once again, this is done in my room, with my speakers, by ears and my brain, so I’m not saying it’s a universal result. 

Jean-Marie