All cables are tone control by nature, longer cables will have more effect. Maybe the first cable you will try will not be satisfactory. A shielded cable may affect the top end from its capacitance and at this length an unshielded cable may pickup hum. Also the dielectric of the cable degrades the low level texture of the music, accumulating over the length of the cable.
To maximize the SQ at that length, a DIY approached would be to build and experiment with RCAs assembled from a pair of spaced cotton covered bare wire, or with a central the cotton wire with layers of further cotton dielectric sleeve to get a diameter of 3/8 and fish the assembly in a 3/8 tin copper braid to get a shielded RCA of lowed capacitance.