Hi guys,
again, thanks for the advice.
Yesterday the mixer arrived and gave no good result, neither the straight connection Bugera headphone out to Marshall fx return, allways bad sound. Now i go test to connect directly from Bugera out to the Marshall speakers. I think i can not do anything wrong because at the backside of the Bugera, where the output to the speaker is, is printed a message " 4 ohm MINIMUM ' and the Marshal is 8 ohm, so .... ill try it. I just have to go to the shop to find a speaker cable for the connection . I let you know.
Thanks a lot.
Christiaan.