New P15 - Status Display and VU meter maths?

[John_H]

I have two P20s powering my two monoblocks and have the same issue with the values on the display not jiving - I have posted this on the PS Audio forum before, but have received no response.

P20 calibration question

Under very similar output loads of ~175W the current output amperages between my two P20s are significantly different. Can anyone explain why the discrepancy (over 20%) is so large? I thought the relationship between wattage and amperage was straight-forward math. Is there something else which needs to be calibrated for my two P20s? [image] [image]