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Toa E 131 manual

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Table of contents for the manual

  • Page 1

    Operating Instruction Manual T O A PROFESSIONAL GRAPHIC EQUALIZER Model E 1 3 1 T O A ELECTRIC CO ., LTD. KOBE, JAPAN[...]

  • Page 2

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

  • Page 3

    The TOA E 1 3 1 is a single channel, 1 / 3 octave active graphic equalizer designed to allow clean, acc ura te audio equalization fo r stage, studio, or commercial applications. T h e E 1 3 1 provides 1 2 dB o f boost or cut at each o f its 28 frequencies, whi ch a r e centered a t I S O 1 / 3 octave increments from 31.5 H z t o 1 6 kHz. It s signa[...]

  • Page 4

    Frequency Response ±ldB, 20Hz t o 20kHz Tota l Harmonic D i st or ti o n Les s than 0. 2% at 1kHz, all sliders at 0 position, rated output Equalization C enter Frequencies 31.5Hz to 16kHz 31.5Hz, 40Hz, 50Hz, 63Hz, 80Hz, 100Hz, 125Hz, 160Hz, 200Hz, 250Hz, 315Hz, 400Hz, 500Hz, 630Hz, 800Hz, 1k Hz , 1.25kHz, 1.6kHz, 2k H z , 2.5kHz, 3. 15kHz, 4kHz, 5[...]

  • Page 5

    Fr eq u en cy Response (Each slider i s set at a m a x o r m in position) Frequency Response (All sliders ar e set at a ma x position) Frequency Response ( ex . 800Hz slider) High pass & L ow pass Filters – 4 – Performance Graphs[...]

  • Page 6

    Peak Indicator LED Th e peak indicator LE D wi ll g lo w when the output level reaches 6 dB below clipping. It i s quite common for the LE D to flash on and off during h ig h level o p eration. However, if the LE D remains steadily lighted, the input level control or the output level o f associated equipment should be lowered until the LED on ly fl[...]

  • Page 7

    Power Fu se (Fuse 0.5A, 0.3A) F us e f or 220/240V A C operation should be 0.3A an d 0.5A f o r 120V AC . AC Inlet The pow er cord mus t b e plugged into it. * Power Cord Clamp A plastic covered metal cl ip i s provided to prevent accidental disconnection o f t he A C power cord. Ground L i f t Switch Th e ground lift switch i s effective t o avoid[...]

  • Page 8

    Mixing Console (RX-7) E 131 (L) E 131 (R) Po we r Amplifier (P 150D) Speaker System (38-SD×2) - 7 - Input / Output C onnections[...]

  • Page 9

    Ground Loops I n any audio system, there are numerous wa ys by which g r o u n d loops can be created. F or example, t h e y may occur wh e n the E 1 3 1 is m o un t e d i n a r ack cabinet, or through AC ground w he n th e E 1 3 1 i s connected with preamps, mixers, etc. T he se gr ou nd lo op s may cause hum and n o is e if ca re i s no t taken d[...]

  • Page 10

    Feedback P revention When the overall gain o f a sound system i s increased, feedback w i l l occur at frequencies where the system response ha s peaks. Suppose th e system ha s an uneven fr equency response like th at shown in the following diagram. Th e frequency at w hi ch feedback w il l occur when gai n i s increased i s about 500Hz. In this c[...]

  • Page 11

    Equalization for m usic T he Graphic Equalizer i s designed not only fo r use in preventing feedback an d equalizing uneven room f r equency response to be flat, but al s o f or equalizing fr equency response to your tastes and producing favourable sound f or you. Fig. 1 shows each frequency band an d its corresponding auditory feeling. F i g. 2 an[...]

  • Page 12

    T O A ELECTRIC CO., LTD. KOBE, J APAN Printed in J a p a n 133-02-674-8[...]