I believe the 8O means 8 ohms. There is a slight error in the announcement.

Power Output: 7 x 125 watts RMS at 8O, all channels driven from 20 Hz to 20kHz with less than 0.05% THD 7 x 190 watts RMS at 8O, all channels driven from 20 Hz to 20kHz with less than 0.05% THD

The 7 x 190 watts RMS at 8O should be 4O (4 ohms). The owner’s manual is correct.