Toa E-1231 Operating Instructions Manual
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Toa E-1231 Operating Instructions Manual

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GRAPHIC EQUALIZER

TABLE OF CONTENTS

2. SAFETY PRECAUTIONS ........................... 2
3. GENERAL DESCRIPTION ......................... 4
4. FEATURES ................................................. 4
5. HANDLING PRECAUTIONS ...................... 4
Front ............................................................ 5
Rear ............................................................. 6
Thank you for purchasing TOA's Graphic Equalizer.
Please carefully follow the instructions in this manual to ensure long, trouble-free use of your equipment.
OPERATING INSTRUCTIONS
7. BLOCK DIAGRAM ..................................... 7
8. DIMENSIONAL DIAGRAM ......................... 7
9. SPECIFICATIONS ...................................... 8
Accessories ................................................. 8
E-1231

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Summary of Contents for Toa E-1231

  • Page 1: Table Of Contents

    4. FEATURES ..........4 5. HANDLING PRECAUTIONS ...... 4 6. NOMENCLATURE AND FUNCTIONS Front ............5 Rear ............. 6 Thank you for purchasing TOA's Graphic Equalizer. Please carefully follow the instructions in this manual to ensure long, trouble-free use of your equipment.

  • Page 2: Important Safety Precautions

    1. IMPORTANT SAFETY INSTRUCTIONS • Read these instructions. • Keep these instructions. • Heed all warnings. • Follow all instructions. • Do not use this apparatus near water. • Clean only with dry cloth. • Do not block any ventilation openings. Install in accordance with the manufacturer's instructions. •...
  • Page 3 · When installing the unit in a rack other than that of from the unit. TOA, be sure to use the screws with a diameter of · If water or any metallic object gets into the unit over 5 mm and length of over 20 mm to mount the ·...

  • Page 4: General Description

    The E-1231 is a single channel, 1/3 octave active graphic equalizer designed to allow clean, accurate audio equalization for stage, studio, or commercial applications. The E-1231 provides 12 dB of boost or cut at each of its 28 frequencies, which are centered at ISO 1/3 octave increments from 31.5 Hz to 16 kHz.

  • Page 5: Nomenclature And Functions Front

    6. NOMENCLATURE AND FUNCTIONS [Front] 1. Power switch 8. Equalizer indicator LED Pushbutton alternately switches the AC power The indicator LED turns on whenever the on and off. equalizer IN/OUT switch is "IN". 2. Power indicator LED 9. Equalizer IN/OUT switch The green LED lights when the power switch is Equalizer switch puts the input signals either in "ON".

  • Page 6: Rear

    E and C to convert to unbalanced type. 16. Ground screw terminal Hum can result from a ground loop to be formed when the E-1231 is connected to other equipment. In such cases, cut the loop by removing a short piece, which should usually be mounted to the terminal.

  • Page 7: Block Diagram

    7. BLOCK DIAGRAM PEAK FILTER INPUT INPUT SLOPE OUTPUT 28-POINT GEQ +15 V –15 V +12 V POWER POWER FUSE AC MAINS MUTING POWER SUPPLY RELAY DRIVE 8. DIMENSIONAL DIAGRAM Unit: mm (in) [Rear] [Front (without security cover)] 4 - 7 × 10.5 280 (11.02) 466 (18.35) 300 (11.81)

  • Page 8: Specifications

    Lowpass Filter 12 dB per octave/6 dB per octave Adjustable Cutoff Frequency: 2.5 kHz to 30 kHz AC Line Voltage E-1231 H: 220 – 240 V AC, 50 Hz/60 Hz E-1231 US: 120 V AC, 60 Hz Power Consumption 11 W Finish Black Dimensions 483 (w) x 88 (h) x 317 (d) mm (19"...

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