Merrill,
If you make the statement that higher inductance speaker cables sound warm, my assumption is that that specific 'warmth' is due to the fact that the inductance is forming a distributed lowpass filter, nothing more, nothing less. If the 'Newtonian' in me made an incorrect assumption, my apologies....
FWIW,
Paul
I think "warm" as in cables is about as hard to define as "musical". I would also try some cables from a cable "library". Good luck!