1. What exactly are speakon connectors and what benefits are there in using them? I've heard that they somehow provide a better amp to speaker connection than banana and 1/4" plugs, but in what way? Is it really a noticeable difference? 2. Do they make cables with 1/4" or banana plugs on one end and speakon on the other? If so, is there any point in using them or do you need a speakon connection on both ends? 3. Can 1/4" speaker outs be upgraded or replaced with speakon jacks? If so, what's the best way to do this?