How to reverse phase on a cartridge?

Connect the tonearm leads to the cartridge pins as follows:

Left Channel
blue to white
white to blue

Right Channel
green to red
red to green

Make sure that your phono pre is the ONLY component that reverses phase.

Thanks BRF. Is out of phase quite noticable? It certainly is very noticable on things like electric guitar pickups.

Brf is correct, however, in most cases you will be better off changing the polarity on the speaker cable leads, switch black with red. The reason for this is that you may be running other sources through your Joule Electra preamp that do NOT invert polarity, CDP, MS, Tuner, etc.

That said, you need to know how your gear is wired. For example, my preamp inverts polarity, however, my CDP also inverts polarity. So I just wired my cartridge out of phase as Brf describes, and now my preamp inverts both CDP and phono back to absolute phase, so I don't need to switch my speaker cable leads.

However, if my CDP was NON-iverting, as most are, I would not invert my cartridge wiring, I would invert the speaker cable leads.

Does this make sense, or just add to the confusion?

OK thanks for that. I should have mentioned that it is a phono preamp only.
I don't hear anything odd, or thin sounding, so perhaps that indicates that all is OK.