I have tried both methods. The cable method and using the filter pong. Both methods have different results. The cable method is a feedback loop while the filter pong adds up the delay times of delay A and B. In that sense the filter pong is not a true series delay.  I understand how the filterpong works when having the delay mix set to A0+B10 (it adds up both delay times). But what happens exactly with the delay times when A10+B10?

I want to create a delay that is 400ms going into another delay of 1600ms without adding up the delay times and without a feedback loop. That is a true series delay. Is that possible on the H9? Neither the cable method not the filter pong does that.