it depends on what you mean by dings. little ones no, at least none that you can hear. it also depends on what kind of guitar, and even then acoustic it still wouldn't matter too much. holes and...
Age of the wood affects the warmth, purity of the tone of a guitar. So, an older acoustic will very possibly have a warmer, more appealing tone than a newer guitar of the same type.
No, the only thing that affects the sound of electric guitars are the pickups, the strings, the amp and/or footpetals. the weight and shape of the guitar have no effect on the sound
YES! it can. depending on how far away you are, if anything else is operating on the same channel your wireless unit is on. if your battery is going ect ect...