@Thomas
Yes, the repulse has many inputs. The Repulse in my A4000 has my TV-card, DVD player, AmigaOne, and CD-ROM on its inputs.
You just need a standard CD-Audio cable connection from the back of the CD-Rom to the CD-Rom input on the Repulse, and to make sure that input is not muted or too low in the Repulse mixer.