As long as the input impedence of the two amps isnt to much for the cd players output stage to drive, you will be fine. Furthermore, I have used and compared splitters vs the straight input in the past, and I did not hear any degradation. However, the splitters are hard on the rca connectors because of the added weight. Also, if the hd 300 is one of the amps your planning on driving, you will not need splitters anyway. The hd 300 has the pass through, or tape out as Craig calls it, that will allow you to drive a second amp. The hd 300 receives a signal, which is then essentially split internally at the amps input, and routed to the tape out rca's. I am planning on driving two amps in this manner, just like you . If you remember, thats part of the reason why I wanted the 100k pot on the hd 300 . The higher impedence pots when paralleled will be much easier for my source to drive. I will have two amps with 100k input impedence, which when paralleled, will result in an easy 50k final load to the cd players output stage.