My quick tests came up with these results I used Binkster test tone cd and started off with the 20hz and went to 40hz tone to avoid the XO point.

Mains Large XO=60 SUB LFE only: no sub for any of the 3 modes(Stereo/Direct/PureDirect)

Mains Large XO=60 Sub LFE+Mains: full output to both sub and mains in all 3 modes.

Mains small XO=60 sub LFE: no sub for Direct nor Pure Direct but did have sub in stereo mode and I believe the crossover was active as well, not much out of the mains till near the XO(50hz).

Mains small XO=60 sub LFE+Mains: I had full range through the mains and sub working for all 3 modes.


Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70