Is there a cable that can warm up my sound?

If your DAC1 has an IEC detachable power cord, try putting a Shunyata Black Mamba power cord on it.

I am not sure a cable will solve your problem, however you might consider this:

I recently purchased a wireworld Supernova III+ TOSLINK cable. It is a GLASS (not plastic) optical cable that you can get for $99 here at audiogon. Used to be that coaxial digital was considered better. However, this glass toslink is getting some pretty good reviews for being sweet. Search the recent archives.

Sell it all and buy a Sony SCD-1.

Try Cardas.