I've been bi-wiring and bi-amping for years using different cables/wires and find it a very useful tool for achieving the sound I want. Some have argued against it.....using wire as a tone control but who cares if it sounds good? You can certainly get mismatches which will sound odd if not outright bad but only experimentation will tell. For what it's worth, I found silver ribbon/foil wire to have the best bass definition and slam. Electraglide silver ribbon speaker cable (Goertz AG-2 I think) really took my 4 12" Peerless 1259 bass drivers to the next level in articulation, clearly placing bass instruments in space, with great clarity (Stanley Clarke was nearly in the room with me), and bass attack could be quite startling.
If you want to experiment on the cheap, try some wire from Ebay. I made some power cords using the Mundorf wire from Taiwan (is it real Mundorf? Don't know, don't care---it sounds very nice and is inexpensive)and they easily compete with higher end manufactured power cords (Wolff, Sunny Cables, TG Audio, BMI). Get some heavy gauge mil-spec silver plated copper and try them on your bass drivers. I highly recommend NOT using any connectors. Simply connect bare wire to both the amp and speaker terminals for the purist connection. I would avoid gold plated wire though as, in my experience, it tends to loose detail in the lower registers and trades both articulation and slam for weight. YMMV. Good luck.
If you want to experiment on the cheap, try some wire from Ebay. I made some power cords using the Mundorf wire from Taiwan (is it real Mundorf? Don't know, don't care---it sounds very nice and is inexpensive)and they easily compete with higher end manufactured power cords (Wolff, Sunny Cables, TG Audio, BMI). Get some heavy gauge mil-spec silver plated copper and try them on your bass drivers. I highly recommend NOT using any connectors. Simply connect bare wire to both the amp and speaker terminals for the purist connection. I would avoid gold plated wire though as, in my experience, it tends to loose detail in the lower registers and trades both articulation and slam for weight. YMMV. Good luck.