Harmful pollarity

so i am busy with my first shruthi-1(smr)
and i am done now with the power supply on the filterboard.
i had put in my 1spot that i already had and thought that will power on the filter but i didn’t got any reaction on the vu meter.
then i realized it is the wrong polarity

is this harmfull for the filter bord?

great community by the way!

No, there’s a diode at the input of the power supply circuit that prevents reverse polarity accidents.

Oke thx :slight_smile:
I now have bought the reverse polarity cable for the 1spot so that the center pin is +