ryder is correct, you can use the change overs, but they would not be fully balanced....it just sound to me as you were not going to change the marantz, in which , you will never get the potiential out of the krell without upgrading the source. the krell can only put out what it gets, the better the source, the better the output. you are in a situation where you must upgrade the marantz to get the full use of krell or sale krell and something more compatable with the marantz, in which you are going backwards. look for a good used cary 300-100 for around eight, i used one and loved it with my krell and they are tonally excellent with good response for the money...dwhitt