This has been (kinda) covered before, but I can't get over that the R&L inputs and speaker outputs are reversed as per the owner's manual. Any amp I have owned has the R&L connections "correct when facing the amp. So, does one just ignore that and hook up cabling as though they were not reversed or do you follow the manual instructions? If the instructions from the manual are followed you will have to cross the cabling. Are people doing that?
From the manual:
"DETAILED INSTALLATION
I. Connections
The connectors and controls are clearly marked on the back panel of the AMPLIFIER. Note the correct left or right channel orientation. The function and channel markings on the rear panel correspond to the front panel controls and their signal paths.
1.The UNBALANCED and BALANCED inputs should be attached to the appropriate unbalanced and balanced outputs of a preamplifier either directly or through a crossover or processor, as appropriate to the application.
2.The LEFT OUTPUT and RIGHT OUTPUT should be attached to the left and right speakers"