low-frequency stage
61Gramophone record — A 12 inch (30 cm) 33⅓ rpm record (left), a 7 inch 45 rpm record (right), and a CD (above) A gramophone record, commonly known as a phonograph record (in American English), vinyl record (in reference to vinyl, the material most commonly used after …
62Zobel network — Linear analog electronic filters Network synthesis filters Butterworth filter Chebyshev filter Elliptic (Cauer) filter Bessel filter Gaussian filter Optimum L (Legendre) filter Linkwitz Riley filter …
63plasma — plasmatic /plaz mat ik/, plasmic, adj. /plaz meuh/, n. 1. Anat., Physiol. the liquid part of blood or lymph, as distinguished from the suspended elements. 2. Cell Biol. cytoplasm. 3. whey. 4. a green, faintly translucent chalcedony. 5. Physics. a …
64Navigation — This article is about determination of position and direction on or above the surface of the earth. For other uses, see Navigation (disambiguation). Table of geography, hydrography, and navigation, from the 1728 Cyclopaedia. Navigation is the… …
65Mechanical ventilation — In architecture and climate control, mechanical or forced ventilation is the use of powered equipment, e.g. fans and blowers, to move air  see ventilation (architecture). Mechanical ventilation Intervention …
66Common emitter — Figure 1: Basic NPN common emitter circuit (neglecting biasing details). In electronics, a common emitter amplifier is one of three basic single stage bipolar junction transistor (BJT) amplifier topologies, typically used as a voltage amplifier.… …
67Passive radar — systems (also referred to as passive coherent location and passive covert radar) encompass a class of radar systems that detect and track objects by processing reflections from non cooperative sources of illumination in the environment, such as… …
68Studio monitor — This article is about studio reference loudspeakers. For onstage monitor speakers for live performances, see foldback (sound engineering). Not to be confused with Broadcast reference monitor. Studio monitors, also called reference monitors, are… …
69Doubly fed electric machine — Doubly fed electric machines are electric motors or electric generators that have windings on both stationary and rotating parts, where both windings transfer significant power between shaft and electrical system. Doubly fed machines are useful… …
70moogerfooger — MF 101 Lowpass Filter moogerfooger is the trademark for a series of analog effects pedals manufactured by Moog Music. There are currently five different pedals produced, however one of these models is designed for processing control voltages… …
