Instruction/ maintenance manual of the product 1000 Series TOA Electronics
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GRAPHIC EQUALIZER TOA 1 0 0 0 series E-1231 Operating Instructions CAUTION TO REDUCE T HE RISK OF ELECTRICAL SHOCK, DO NOT REMOVE COVER. N O US ER SERVICEABLE PARTS INSIDE.
Contents Cautions General Description Features Front Panel Rear Panel Input/Output Connections Installation Precautions Applications Optional Matching Transformer Mo unting Performance Graphs Block Diagram Specifications Accessories Appearance 2 3 3 4 5 6 6 7 • 8 9 10 11 12 12 12 Cautions 1.
General Description T h e E-1231 is a single channel, 1 / 3 octave active graphic equalizer designed to allow clean, accurate audio equalization fo r stage, studio, o r c o mmercial applications. The E - 1 2 3 1 p rovi des 1 2 d B of boost or cut at each of its 2 8 frequencies, which ar e centered a t I S O 1 / 3 octave increments fr o m 3 1 .
Front Panel Lowpass Filter S lop e S election S w itch This switch s ets t he lo wpass filter's p e r o ctave attenuation f o r either 6d B or 12dB. Pe a k Indicator LE D T he p e ak indicator L E D lights wh en either th e input or the output leve l reaches 3 dB below clipping.
R ea r Panel AC Fu se Holder When replacing, b e sure to u s e th e fuse of specified rating an d type to avoid th e possibility of fire. Fuse rating 220-240V version 250V T80mA 1 2 0 V version 2 5 0 V 0 .
Input/Output Connections I n p u t t er min al from m ixer, etc . Input terminal from mixer, etc. E-1231 E-1231 Power Amplifier Speaker System Installation Precautions Ground Loops I n a n y audio system, there a re numerous ways b y which ground loops c a n b e created.
Applications Feedback Prevention Wh en the overall gai n of a sound system is incr eased, fee dback will occur a t frequencies where the system response ha s peaks. Suppose the system h as a n uneven frequency response like that shown i n the following diagram.
Applications Equalization fo r music Th e Graphic Equalizer is designed not only f o r us e in p reventing feedback a n d equalizing uneven room frequency response to b e flat, b u t a l so fo r equalizing frequency response to your tas te s a n d prod u cing favorable sou n d for y ou .
Optional Matching Transformer Mounting [CAUTION] THESE SERVICING INSTRUCTIONS A RE F OR USE B Y QUALIFIED PERSONNEL ONLY. TO AVOID ELECTRIC SHOCK D O N O T PERFORM AN Y SERVICING OTHER THAN THAT CONTAINED IN THE OPERATING I NSTRUCTIONS UNLESS Y O U AR E QUALIFIED TO DO SO.
Performance Graphs Frequency Response (Each slider is set a t a max or mi n position) Frequency Response (ex . 800Hz slider) Frequency Response (ex. 630Hz, 800Hz, 1kHz slider) Hig h pass Filter Low pa.
Block Diagram — 11 —.
Specifications Frequency Response ±1dB, 20 Hz t o 20kHz Total Harmonic Distortion L es s t h a n 0.01% at 1 k H z , al l sliders a t 0 position, rated output Equalization Center Frequencies 31.5Hz t o 16kHz 31.5Hz, 40H z, 50Hz, 63Hz, 80Hz, 100Hz, 125Hz, 160Hz, 200Hz, 250Hz, 315Hz, 400Hz, 500Hz, 630Hz, 4kHz, 5kHz, 6.
An important point after buying a device TOA Electronics 1000 Series (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 Electronics 1000 Series 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 Electronics 1000 Series - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, TOA Electronics 1000 Series you will learn all the available features of the product, as well as information on its operation. The information that you get TOA Electronics 1000 Series will certainly help you make a decision on the purchase.
If you already are a holder of TOA Electronics 1000 Series, 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 Electronics 1000 Series.
However, one of the most important roles played by the user manual is to help in solving problems with TOA Electronics 1000 Series. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device TOA Electronics 1000 Series 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
