Benz Ace Cartridge - output of the Red bodied one?

Hello, I just purchased a Rega 25 t.t with RB300 arm and a Benz Ace Red bodied M.C. cartridge - can anybody out there tell me what kind of output this cartridge puts out - it must be very low, I've got an old Monster Cable Alpha Genesis MC @ 0.27 mv. and the Benz seems lower than that. any ideas ? thanks gents.