Electro-Voice ELECTRO-VOICE EQ-231 manual

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Table of contents for the manual

  • Page 1

    Description The Electro-V oice EQ-231 is a boost-and- cut stereo 1 / 3 -octave graphic equalizer whose primary use is for tuning the overall fre- quency response of a sound reinforcement system, both to increase gain-before-feed- back and to compensate for the deficiencies in the acoustic environment and the sound system. Features The variable-Q ac[...]

  • Page 2

    EQ-231/Graphic Equalizer EQ -231/Graphic Equalizer 2 The equalizer shall meet or exceed the fol- lowing performance specifications: fre- quency response at unity gain, …1 dB 20 - 20,000 Hz; total harmonic distortion less than 0.01%, 20 - 20,000 Hz at 0 dBu; a noise level of less than -97 dBu; gain of ±6 dB or ±12 dB; balanced-input impedance of[...]

  • Page 3

    EQ -231/Graphic Equalizer EQ-231/Graphic Equalizer 3 FIGURE 5— Front and Back Panel Details FIGURE 3 — High-Pass Filter Response, Upper T race Lo-Cut Off, Lower T race Lo-Cut On FIGURE 4 — Frequency Response, +6- dB Gain Position(high-pass filter off) OUTPUT IN dB OUTPUT IN dB[...]

  • Page 4

    EQ-231/Graphic Equalizer EQ -231/Graphic Equalizer 4 ELECTRONICS–Graphic Equalizer Part Number 532251 — 9937 600 Cecil Street, Buchanan, MI 49107 616/695-6831, 616/695-1304 Fax ©EVI Audio 1999 • Litho in U.S.A. General Specifications Conditions: 1. 0 dBu = 0.775 volts rms. 2. 120 volt ac line input voltage maintained for all tests unless not[...]