With my 4802r, the manual says that the surround settings set in direct mode will be the settings used in pure direct.

It also goes on to say that " the crossover frequency setting must be set to 'fixed thx' in the system setup in order to turn off the digital circiut when in the analog input mode in the 'PURE DIRECT" mode".

Fixed thx sets the crossover to 80hz

clear as mud?