Instruction/ maintenance manual of the product E 131 Toa
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Operating Instruction Manual T O A PROFESSIONAL GRAPHIC EQUALIZER Model E 1 3 1 T O A ELECTRIC CO ., LTD. KOBE, JAPAN.
Precautions ................................................ 1 General Description ........................................ 2 Features ................................................... 2 Specifications ............................................. 3 Appearance .
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.
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.
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 .
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.
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.
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.
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.
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.
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.
T O A ELECTRIC CO., LTD. KOBE, J APAN Printed in J a p a n 133-02-674-8.
An important point after buying a device Toa E 131 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Toa E 131 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Toa E 131 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Toa E 131 you will learn all the available features of the product, as well as information on its operation. The information that you get Toa E 131 will certainly help you make a decision on the purchase.
If you already are a holder of Toa E 131, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Toa E 131.
However, one of the most important roles played by the user manual is to help in solving problems with Toa E 131. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Toa E 131 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
