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Operating Instruction Manual

TOA PROFESSIONAL GRAPHIC EQUALIZER

Model E 131

TOA ELECTRIC CO., LTD.

KOBE, JAPAN

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Summary of Contents for E 131

Page 1: ...Operating Instruction Manual TOA PROFESSIONAL GRAPHIC EQUALIZER Model E 131 TOAELECTRICCO LTD KOBE JAPAN ...

Page 2: ... and 220 240V AC operation with a voltage selector The voltage selector on the rear panel of the 220 240V version should be checked for proper setting prior to operation as improper setting causes trouble The voltage selector is set for 240V operation at the factory 3 Do not operate the E 131 from power mains which exceeds the indicated mains voltage by more than 10 4 Do not expose the E 131 to co...

Page 3: ...ion bypass in the event of loss of AC power and an output muting function suppresses turn on turn off transients A smoked plastic security cover is included with the E 131 to guard against accidental disturbance or intentional tampering when used in fixed installations Inputs and outputs are transformer isolated and balanced with both XLR and 1 4 stereo phone jacks Ground lift switches are provide...

Page 4: ... A weighted Input Connectors One female XLR connector pin 1 shield pin 2 cold pin 3 hot XLR is balanced and in parallel with one tip ring sleeve standard phone jack Output Connectors One male XLR connector pin 1 shield pin 2 cold pin 3 hot XLR is balanced and in parallel with one tip ring sleeve standard phone jack Indicators A red LED for output clipping A green LED for equalizer IN A green LED f...

Page 5: ...Frequency Response Each slider is set at a max or min position Frequency Response All sliders are set at a max position Frequency Response ex 800Hz slider High pass Low pass Filters 4 Performance Graphs ...

Page 6: ...in reducing excessive background noise such as that produced by old phonograph records Input Level Control This control adjusts the input gain by 12dB to allow the use of a wide range of input sources To insure the best S N ratio possible adjust this control so that the peak LED flashes only occasionally Equalizer Sliders These sliders are adjusted to tune or equalized the overall frequency respon...

Page 7: ... may induce hum Sliding the ground lift switch from a NORM position to the LIFT position cuts ground loops and may reduce hum For most applications it should be set to the NORM position Output Connectors The XLR output connector is balanced and is wired in parallel with the phone jack that can accept tip sleeve as well as a tip ring sleeve type of plug The output impedance is 600 ohms Input Connec...

Page 8: ...Mixing Console RX 7 E 131 L E 131 R Power Amplifier P 150D Speaker System 38 SD 2 7 Input Output Connections ...

Page 9: ...ng to minimize noise Ground lift switches are provided on the rear of the E 131 Sliding the ground lift switch from a NORM position to the LIFT position lifts ground On the road use The E 131 is sturdily constructed with an aluminum die cast front panel that is reinforced by means of an iron plate attached to its back To ensure that strength is maintained during its transportation from one place t...

Page 10: ...rocedure sufficient gain in the sound system is obtained before feedback Room Equalization In a sound reinforcement system for a room the clarity of sound can be adversely affected by the room frequency response including standing waves room resonances reflections of sound and relations between direct and indirect sound The E 131 is an effective tool to equalize the room frequency response to a fl...

Page 11: ...e Piano Acoustic Piano Electric Organ Violin Brass instruments Bass drum Snare drum Tom Tom Floor Tom Hi Hat Cymbal overhead Talk Box Bass strings resonate between 70 to 120Hz body around 300Hz Avoid boosting these to stop feedback 3kHz and 5kHz gives great clarity Resonances differ depending on type Good full sounds around 300 to 500Hz Clarity at 3kHz Extreme lows are at 60 to 90Hz Pick or pluck ...

Page 12: ...TOAELECTRICCO LTD KOBE JAPAN Printed in Japan 133 02 674 8 ...

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