question on c-j amps

Read the manual because not all CJ preamps are phase inverted (most are). Kig is correct on the fix.

I have a MC phono stage that is phase inverted. I have to reverse the +\- tonearm wires going to the cartridge.

CJ preamps are phase inverting, but their amps are not. The solution is to simply reverse the polarity of the speaker connections to both speakers to account for this (- to +, + to -). If you switch to using a non inverting preamp, then the speaker connections should be returned to normal polarity. Getting this wrong won't harm anything, but the sound quality will definitely suffer.