At home I ususally rehearse with a mixer to 2 powered monitors. Two inputs on the mixer are fed with the Direct Output and the Monitor Output of my Powerhead for stereo out. Perfect stereo sound.
I also have a stereo 2-12 ENGL cab but these connections don't work this way with a powerhead , even when Monitor Stereo is checked in Output Source in the Output Section (on page 1/9). No sound WSE!
So do I need an extra poweramp then when I want to use such a stereo cab on stage?