hello,i am new to this forum,i have some questions for the px unit,i want to buy it but i have 8 passive speakers connected to 2 power amplifiers , with a mixer unit.no sub speakers...

first can i use the subwoofer output to drive a power amplifier which drives 4 full-range passive speakers,if equalise the high pass filter( the manual writes Adjusts the frequency of the High Pass filter from OUT (below 20Hz) to 20KHz),in other words make the sub output a normal output,covers all the bandwith range for full-range use,

second one person which know these dbx px units tell that if i connect the px to 2 stereo power amplifiers,and make the sub out for full-range use(how i do this?)
then the unit is available to drive two power amplifiers for full-range use with passive speakers.

the specifications in the manual of px
ANALOG OUTPUTS:
Number of Outputs: 2 (Stereo) Line outputs
2 Sub outputs (mono or stereo)
Connectors: 2 Male XLR XLR line outputs

2 Male XLR Sub outputs
Type: Electronically balanced, RF filtered
Impedance: 120 Ω
Max Output Level: +20dBu

this impedance and Max Output Level is equal with the pa unit which can drive power amplifiers
6
Connectors:

Male XLR
Type:

Electronically balanced, RF filtered
Impedance:120ohm
Max Output Level: +20dBu

then with these specifications why cannot drive the px 2 power amplifiers with passive speakers,
is only for active speakers?