Mackie 1642-VLZ Pro Owner's Manual Glossary - Page 17

tial. Unbalanced circuit connections require only two conductors (signal "hot" and ground). Unbalanced audio circuitry is less expensive to build, but under certain circumstances is more susceptible to noise pickup. unity gain A circuit or system that has its voltage gain adjusted to be one, or unity. A signal will leave a unity gain circuit at the same level at which it entered - no amplification, but no loss either. In Mackie mixers, unity gain is achieved by setting all variable controls to the marked and usually detented "U" setting. Mackie mixers are optimized for best headroom and noise figures with all gain stages beyond the preamp set at unity gain. V VLZ Acronym for very low impedance, a Mackie design principle. VLZ is one of the most important reasons why inherent noise levels on Mackie mixing boards are so minuscule. Thermal noise is generated in all real world electronic components that have impedance. By keeping the impedances within the mixer circuitry low, Mackie keeps internal noise to a minimum. W wet A signal with added reverberation or other effect like echo, delay or chorusing. X XDR Acronym for eXtended Dynamic Range. XDR is collection of Mackie circuit design elements which contribute to the low noise, high headroom mic preamp circuit employed on many Mackie mixers. XLR connector See Cannon. Y Y-Cable A cable with one input and two outputs, used to mult a source to two inputs. volume The sound level in an audio system. Perhaps the only thing that some bands have too much of. VRMS Acronym for Volts Root Mean Square. See RMS. Z Z The electrical symbol for impedance. zymurgy The science of brewing, an important part of Mackie technology since the factory is located less than a mile from the Red Hook brewery. Besides, we needed something other than just plain "Z" to put in this A-to-Z glossary. 17