Connecting Cable Box to Preamp


I'm setting up a Krell KSA-250 amp with a KAV-250p preamp that has balanced inputs. My source is classical music from my cabel box. The box has optical and HDMI imbedded outputs.

What do I need between my cable box and my preamp?
mh_stevens
Are you sure that your cable box doesn't have analog (rca) outputs as well? If not, probably the best way to go would be to get a DAC that has an optical input.
My box has an analog rca left & right out . It's a Cisco box from Bright House cable .
If yours does not , I would go optical out to a DAC . I think that HDMI would be overkill for 2 channel audio .

Happy Tunes
Post removed 
The quality of the signal over a cable box is usually pretty low, like 96 or 192 kbps. Assuming the cable box has RCA outs, I doubt that getting a separate DAC will provide much better sound than the DAC in the cable box. If the box has RCA outs, I would start with a set of RCA to balanced cables, like the ones available like the Monoprice for $5 a piece.

If the box does not have RCA outs, I would go with a very cheap DAC, given the low quality of the source. It does not have to have balanced out, since you can go RCA to balanced with cables or adapters.

I do not know what quality your cable provider delivers, but I doubt that this is ever going to be a high quality source.