I am sure that as engineers we are all familiar with the terms high impedance, and low impedance. These words are usually used to describe a signal, and the load level that is needed by the signal. You will often see these words used to describe the input section of a piece of outboard gear, which is supposed to quickly tell you something about the input characteristics of that piece of gear. The general rule of thumb is that the higher the impedance at the input, the more accurate the tone will be, while low impedance inputs tend to be the more coloring of the two. Here is why I do not understand the common terminology. I believe that instead of terming these inputs as high vs. low impedance, we should instead call them high vs. low resistance, or high vs. low potential. The word resistance is a straightforward word, a resistor impedes everything through it in an even fashion (the ideal resistor). The word impedance is resistance with phase angle and time constant. In short, impedance is the resistance to AC flow, and in audio, AC is our throughput signal. So it would follow that to impede the AC signal would be to change the sound from its natural state. When the parallel resistor in the input of a circuit is made larger, the input resistance or input potential difference grows higher, but I believe that the input "impedance" drops because it is providing a more sufficient load for the AC and will color it less assuming a low line capacitance. To overstate my point **The throughput signal is not colored by the input stage as input resistance increases, and thus I believe that as a result the input impedance decreases** It very simply doesn't make sense. Lots of companies advertise their products as "Ultra high impedance input!!!" and it is supposed to connote a positive thing. Being that our field is audio, we are supposed to grab our wallets and say "oh yes! my audio signal is going to be decimated by this piece of gear!" We should instead describe the inputs of more transparent pieces of gear by saying that they are Ultra Low impedance instead, because to impede the AC signal is to impede its flow in at least one range of the spectrum, which would change the sound.