randall warhead cab question

[zepplin490]

I have a randall warhead straight 4x12 cab and it has an 8 ohm highpass input and 2 4 ohm full range inputs, my question is what does highpass and full range mean? does it mean that it is stereo?
-mp-

 

[zepplin490]

Ok i read a post from another message board saying that the 4 ohm inputs were stereo, I tested it with my pre/poweramp combo and it worked like a charm!
-mp-