connecting CD player to preampr?


Hello everyone, I'm new here and need a little guidance. I'm thinking about buying a onkyo P-303 preamp. It has no CD in, only phono, mic, tuner and tape in. So, if I connect my CD player to tape or tuner am I losing any sound quality? or should I stay clear of such gear?
david1909
Stanwal brings up an interesting point, I no longer see inputs labeled Mike, Sue has become a lot more common. But that goes to the popularity of Johnny Cash's song, I think.