During a lazy Saturday afternoon, there was a person asked on one of the mailing list about the orientation of the Bennic FPP capacitor. Unfortunately, I couldn’t find any Bennic FPP on my shelves. Only XPP was available. So here you go, the Bennic XPP Capacitor orientation check.

From the measurement, we can see that the outer foil of this Bennic XPP capacitor located on the left side (as we read ‘Bennic’ word from left to right). So theoretically speaking, this side should be use as input on the signal application or ground on the power supply application.

The measurement of the inner foil. Less prone to interference compared to the outer foil one.

The measurement result doesn’t always reflect the best in sound, but this will advise the correct way to use the capacitor.