Instruction/ maintenance manual of the product E111 Toa
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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.
Precautions ................................................ 1 General Description ........................................ 2 Features ................................................... 2 Specifications ............................................. 3 Appearance .
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.
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.
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 .
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.
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.
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.
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.
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.
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.
T O A ELECTRIC CO, LTD. KOBE, JAPAN Printed i n Japan 133-02-688-3.
An important point after buying a device Toa E111 (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 E111 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 E111 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Toa E111 you will learn all the available features of the product, as well as information on its operation. The information that you get Toa E111 will certainly help you make a decision on the purchase.
If you already are a holder of Toa E111, 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 E111.
However, one of the most important roles played by the user manual is to help in solving problems with Toa E111. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Toa E111 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
