You originally asked about bi-wiring speakers. The crossovers in speakers are designed such that two input sources are needed. That is why four posts are placed on the back of the speaker instead of two. Most speaker manufacturers will add a brass bar from the usual imput posts to the second set of posts (to provide that second input). Now, is brass as good a conductor as copper. No. Could you hear the difference if you removed that brass bar and put in it's place speaker wire from Home Depot? Perhaps. I have bi-wire speakers and I tried it both ways, with the bar and with speaker cable. I could not hear any difference. This is not to say that you won't. This is up to you to decide. If you decide it is worth spending some money on speaker cables, I would suggest something other than Monster. Perhaps Vampire, XLO, or some others.