Albert, Thanks so much for letting us know about that KAB device. It seems to be quite a bargain at the price. I just ordered one.
As to the OP's question, the output of a CDP would drastically overload the input of any MC phono section and probably most MM phono sections as well, as many others have noted. (The latter typically have a much higher upper limit for signal voltage going in compared to the former.) However, I don't think it would do permanent damage to a tube type, maybe to a SS type. I do wonder whether you would get the break-in effect that you seek. Bottom line: don't do it.
As to the OP's question, the output of a CDP would drastically overload the input of any MC phono section and probably most MM phono sections as well, as many others have noted. (The latter typically have a much higher upper limit for signal voltage going in compared to the former.) However, I don't think it would do permanent damage to a tube type, maybe to a SS type. I do wonder whether you would get the break-in effect that you seek. Bottom line: don't do it.