I have a goodmans 5.1 surround sound system. All the speakers plug into the back of the subwoofer and the subwoofer connects to the dvd player by a cable, i don't no what sort of cable this is but above where you plug it in it says "subwoofer audio out 5.1ch". the dvd player is starting to not work and i want to change it. if i buy a new dvd player would i be able to plug it in via this cable as a lot of dvd players i have looked at do not have this output on the back of them.