Ranger RCI-6300F Question

I got hold of an old Ranger 6300F (not the TB, -25, or -150), running a pair of 2312's in the finals, and a 2166 in the driver. It's working fine, pep about 20 watts. I think I remember folks talking about them doing more like 45-50 watts pep, but maybe my memory isn't correct. It's pretty much stock, the board is a EPT690010B. The finals test OK, though I've not sub'd them with anything else to check. Should it be doing more, and if so, wonder what I'm overlooking.

Thanks,
Dave