If not you would still have to use the DSPeaker in an analog processor/tape loop, since its only digital input is optical.
I'm using a MSB Digital Director to convert from Coax to Optical into my Dual Core. I have the same issue with Coax only from my 47 Labs Flatfish transport. MSB doesn't make them any more so you have to find a used one, about $100.00. The Digital Director is 12v and can be powered by a 12v battery power supply if desired. Also the Behringer SRC 2496 can be used as well to convert from coax to optical. See how it is used here, http://forum.audiogon.com/cgi-bin/fr.pl?ddgtl&1329307228&read&keyw&zzdspeaker. Scroll down to the response by Ginov.
Hope this helps.