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Toa E111 manual

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Table of contents for the manual

  • Page 1

    Operating Instruction M anual T O A PROFESSIONAL GRAPHIC EQUALIZER Model E 111, E 112 E 112 T O A ELECTRIC CO, LTD. KOBE, JA PA N E 111[...]

  • Page 2

    Precautions ................................................ 1 General Description ........................................ 2 Features ................................................... 2 Specifications ............................................. 3 Appearance ................................................ 3 Performance Graphs .................[...]

  • Page 3

    Th e T OA E 1 1 1 i s a single channel, 1 / 1 octave active graphic equalizer designed to allow clean, accurate audio equalization fo r stage, studio, or commercial applications, while the E 1 1 2 i s a double channel version. T h e E 1 1 1 a nd E 1 1 2 provide 12dB of boost or cu t a t each o f i ts 1 0 frequencies pe r channel, which ar e centere[...]

  • Page 4

    Frequency Response ±ldB, 20Hz to 20kHz Total Harmonic Distortion Le s s th an 0 .2 % at 1kHz, al l sliders at 0 position, rated ou tput Equalization Center Frequencies From 31.5Hz t o 16kHz peaking type 3 1 . 5 H z (22Hz to 44Hz) 63Hz (44H z to 88Hz) 125Hz (88Hz t o 176Hz) 250Hz (176Hz to 350Hz) 500Hz (350Hz to 700Hz) 1kH z (700Hz to 1.4kHz) 2k Hz[...]

  • Page 5

    FREQUENCY RESPONSE (Each slider i s se t at a max position) FREQUENCY RESPONSE (ex. 1k Hz slider) FREQUENCY FREQUENCY BANDWIDTH CONTROL (ex. 1kHz slider) CEN TER FREQUENCY CONTROL (ex . 1kHz slider) FREQUENCY FREQUENCY — 4 — Performance Graphs[...]

  • Page 6

    E 111 E 112 Equalizer L ED indicator Allows adjustment o f frequency re s ponse by using th e E Q sl id e r s , bandwidth controls a n d Centre frequency co ntrols while the L ED remains lit . Th e frequency response i s flat regardless of t h e position o f th e E Q sliders wh en t h e LED is extinguished. Select either o f the frequency modes w i[...]

  • Page 7

    Pow er LED indicator It is possible t o operate t he E 1 1 1 and E 1 1 2 equalizers while the LED remains lit. Wh il e the LE D i s O F F , the signal fed to th e rear-mounted input connector o r ja ck i s delive red to the output connector o r jack as it is. Power switch Pushing this switch causes the power to light and pu ts the equalizer i n the[...]

  • Page 8

    Mixing C onsole ( R X - 7 ) Power Amplifier P 150D Speaker System 38-SD×2 Ground Loops In any audio system, there a r e numerous ways by which ground loops c an b e created. F o r example, they may occur when the E 111/112 a r e mounted in a rack cabinet, o r through A C ground whe n th e E 111/112 a r e connected with preamps, mix ers, etc. These[...]

  • Page 9

    On the ro ad use T h e E 111/112 are sturdily constructed with an aluminum die-cast front panel that is reinforced by means o f a n ir o n plate attached to it s back. T o ensure that strength i s maintained during thei r transportation from one p lace to an other, however, y ou should a l s o reinforce ea ch un it from th e back of the rack with a[...]

  • Page 10

    Feedback Prevention When the overall gai n o f a sound system i s increased, feedback wi ll occur a t frequencies where the system response h as peaks. Suppose t he system has an uneven frequency response like tha t shown i n the following di agra m. The frequency a t whic h feedback w i l l occur when gain i s increased i s about 500Hz. I n t h i [...]

  • Page 11

    Equalization for music Th e Graphic Equalizer i s designed not only f or use in preventing feedback and equalizing uneven room fr eq ue nc y response to b e flat, but a l so for equalizing frequency r esponse to you r tastes and producing fa vo u ra b le sound for you. F i g. 1 shows each frequency b and an d it s corresponding auditory feeling. Fi[...]

  • Page 12

    T O A ELECTRIC CO, LTD. KOBE, JAPAN Printed i n Japan 133-02-688-3[...]