The all-metal construction and high-quality circuitry means you can count on the MD1 to work! It's a good idea to have at least 1 extra to use when you need it. If a new musician comes to church with their own gear, you'll want to have one of these to run their signal back to the sound booth. By converting your high impedance 1/4" signal to a low impedance XLR signal, you can run your instrument lines much farther without interference!