activate Pulseaudio -remixing with Kodi 17

Hello,

for the sound i use an active 2.0 loudspeaker system plus active subwoofer (thus 2.1) at my HTPC with Linux (Lubuntu) and Kodi.
So that the subwoofer is also playerd with music in stereo sound, i use the Pulseaudio function lfe-remixing with adjustable crossover frequency.
Until Kodi 17 this setup worked well, but now the subwoofer remains mute …. the reason I found now in the Wiki (lfe-remixing only works with remixing!):

Quote:Starting with the upcoming kodi v17 Krypton the above behaviour is taken care within kodi. You don’t have to disable remixing in pulseaudio anymore. That means content is output without further remixing by pulseaudio server if a sane mapping is possible

How can I disable this “feature” and enable the Pulseaudio remixing for Kodi again?
Or is it possible to set a crosover-frq for the stereo upmix audio-featur in Kodi?

greetings,

H.