It's a hard nut to crack with critical. I have the cx1-g2 one died and had to send it in for replacement. Now this one seems to get a little erratic with longer usage around an hour or more I can feel slight voltage shifts. I first assumed it was my RCA cable and tried a battery power supply ( steadiest type of power ) and can confirm that it is my critical acting strange. I don't know if it's the unit itself or the wall plug but I don't think they last very long anymore. Maybe a year or two.

I may just switch back to battery power.