I'm in the process of revamping the wiring to my home theater system. I'm installing a wall jack, as I do have speaker wire hidden inside the walls. I'm planning on using a single gang outlet box that will have banana clip ports.
From the research I've done, it appears using banana clips helps prevent oxidation on the wires. I'm not exactly sure why, but I'm guessing it's because there is less air contact (almost none) where the wires are "flanged" out to touch the metal before the screw cap is placed, etc. I don't want to screw in bare wire behind the wall plate... as that will defeat the purpose of preventing oxidation. So my plan is to banana the back (behind the plate). Also, to banana the front (in front of the plate). And also to use banana at the outputs of the receiver/amp.
So far so good? Or is there a preferred better way of doing the above steps? Some prefer to use spade lugs (I will get to that in a moment). I'm also not sure if the banana clips will have insulation at the grabbing point to prevent accidental cross-touching in case the amp gets turned on and any of the wires are outside the sockets.
Secondly, I would also like to do something at the speaker terminals. One set of speakers DOES have the banana clip option - so I plan to use them there. But my center channel (and others) do not! I have seen "pin" style banana clips, but I do not like those. I think they "wiggle" too much, and I have the old push-down tab style on the back of the speaker.
So currently what I do is just do a twisted thread of bare wire on the speaker points. But about every 2-3 years I need to take my wire strippers... cut off the existing points... and rethread a new 1/2" twisted thread to remove any oxidation. I find there is a VERY slight difference in performance when there is a dark coating on the bare wires, but more importantly the added resistance tends to "tax" my receiver/amp.
I was curious what the AVS'rs do to help prevent oxidation at the speaker level. Is there some kind of anti-corrosion material I can brush on the wire threads? Can you use spade lugs instead of the skinny pin-prong banana style clips? As I said before, the thin prong tends to move around too much, and I also fear the metal may touch the other speaker wire and short out the receiver. I have seen some banana style clips that have a plastic separator to make sure the two leads never touch! That's a great idea, and I wouldn't mind using those. But I still don't like the long pin prongs.
Can the bulging banana style also work inside the push tab (older) style speakers?
What do the folks here on AVS like to do in this situation?
And does everything look okay on the top section?