Was debating between this thread and amp thread but we'll see I'm using a monitor box that was given to me to put a 12" speaker into. The old electronics in the box were basically 2-1/4" jacks (one labeled in, one labeled out) with an attenuator wired in to control volume. No crossover, looks like the tweeter was wired into the attenuator. Tweeter disconnected years ago.. I'm just wanting to hook the two (new) 1/4" jacks straight to the speaker (don't need crossover and attenuator whatnot). What I want to do is to have them wired so that if one side gives me an issue I can just use the other until I can fix it. So basically I guess they need to be in parallel? Currently, there's a black wire soldered into one leg of 1st input jack (labeled "in"), with a red wire that is soldered onto the other leg of the "in" jack and then it runs over to a leg on the "out" jack and is soldered there, tying them together. Second "out" jack has no black wire. So I'm assuming if I wire the new ones the same way, I'll have an in and an out (to a second monitor perhaps?). What would I do to have two ins? Or better yet, two jacks where I can either use them as ins or outs..... ?