HI Bob, If I remember correctly, one amp might have been for the 78's juke, the other for 45's...I dont have a manual in front of me so I am not positive, but I do have a "DD" in my E120 juke on 45's. I am sure others here know what one is correwct for the D80. I have seen CC amps in E80 and E120 jukes before too. Dennis.