Munch, welcome. You haven't described what the coaxial cable would be used for. It might be used to connect the digital output of a player to the digital input of the 1804, but players commonly are supplied with a coaxial cable which can be used for that purpose. As far as speaker cables, if your M22s aren't going to be a great distance away from the 1804(e.g. more than about 30 feet)which isn't likely, then two lengths of regular 16ga lampcord is all you need to connect the main speaker outputs of the 1804 to the speaker terminals of the M2s.
