effects loop

  • Hi a friend lent me a Marshall origin 20 and I was having a play around on it pedals going in the front ,but I don't have any reverb or chorus effect pedals so I thought can I connect my Kemper using the effects send and return inputs and insert them there, so far I've had no luck making it work

    what am I missing I can hear the amp and effects in the Kemper headphones but the sound coming out of the amp speaker remains unchanged by the Kemper

    I've tried connecting the return to the amp from the main output from the Kemper I've tried using the alternative input at the back

    any ideas what I am doing wrong


    many thanks

    axe