Thin, wide conductors have lower inductance. Inductance increases in a wire if you coil it like a spring (it is now an air-cored inductor - wrap the wire round a magnetic metal and you have a traditional inductor). Capacitance results from how close the conductors are to one another.
Braided cables have low inductance because because the three or more cable braiding makes the wires zig-zag across one another, as opposed to two cables being twisted together would which make two coils increasing inductance. However braiding multiple cables increases capacitance.
Three-wire braiding is easy?but not fun and painful on the hands - you will probably only want to do it once. 4 and 8 wire braiding is harder as you have to keep track of which strand is which. However you can easily and cheaply make yourself some very good-looking and capable speaker cables. Get yourself some CAT network cable that uses solid-core conductors - usually marked ?plenum? for CAT5. Then either strip the outer insulation and directly braid the inner conductor pairs or braid three or more complete CAT cables directly. CAT 5 has four twisted pairs of 24 AWG conductors, twelve 24AWG conductors equals one 13AWG conductor and thats about as large as you need to go!
