CJ does this because they would have to add another stage to the preamp to make it phase correct. Adding things to the signal path usually only makes things worse. Some Blue Circle preamps are this way also. My phono stage is out of phase for the moving coil connection for the same reason (less is more). The moving magnet stage is in phase. This is corrected by reversing the wires going to the cartridge.
speaker phase
my new[used] cj10a pr amp is phase inverting.do i have to switch the terminals on both speakers? can i do it at amp end or does it have to be at the speaker end? thanks.would appreciate any and all help.