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Power LED indicator

It  is possible  to operate  the E 111  and E 112 equalizers  while the LED remains lit. While the LED is OFF,  the
signal fed to t h e rear-mounted input  connector or jack 

is delivered to the o u t p u t connector or jack

as it is.

Power switch

Pushing this switch causes the power

 

to light  and  puts  the equalizer in the  operation  mode. By

again pushing the  switch,  the power LED 

can be extinguished,  permitting the input fed to the rear-

mounted  i n p u t  connector or jack 

to be delivered to the o u t p u t connector or jack 

as it  is.

Tampering  protection  cover

Prevents accidental move of switch or control that has been set. Always f i t the cover in place except when
i t  needs to be removed for a d j u s t m e n t .

E

    111

E 112

Fuse

Be sure  to use  the fuse of same  t y p e and  c a p a c i t y  as  are i n s t r u c t e d .

Power  inlet

An accessory power cord connects here. A use of t h e U-shaped clamp supplied with the equalizer by
inserting it into the holes provided above and below the power inlet is recommended to prevent accidental
disconnection of the power cord.

Ground  lift  switch

The  s w i t c h is used to avoid earth loop that causes hum noise when the equalizer (E 1ll/E 112) is
connected to other equipment.  By  s h i f t i n g  the switch  to the LIFT position,  the earth  loop may be cut.
N o r m a l l y ,  set  the switch to NORM.

Output  connector and phone jack

A balanced type connector and jack  w i t h o u t p u t  impedance of 600 ohms.  Both are wired in parallel.

Input connector and phone jack

A balanced  t y p e connector and phone j a c k w i t h i n p u t  impedance of 10k  ohms.  Both are wired in parallel.

Power cord hangers

Wind the power cord onto the hangers when the equalizer (E 1ll/E 112) is not in use.

— 6 —

Front Panel

Rear Panel

 LED

Содержание E 111

Страница 1: ...Operating Instruction Manual TOA PROFESSIONAL GRAPHIC EQUALIZER Model E 111 E 112 E 112 TOA ELECTRICCO LTD KOBE JAPAN E 111 ...

Страница 2: ...ly 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 equalizer from power mains which exceeds the indicated mains voltage by more than 10 4 Do not expose the equal...

Страница 3: ...unction provides complete equalization 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 111 or E 112 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 ...

Страница 4: ...B Rated Output Level 4dB Maximum Input Level 24dB at 1kHz Maximum Output Level 24dB with 600 ohm load Input Impedance 10k ohms Output Impedance 600 ohms High Pass Filter 40Hz 12dB octave Low Pass Filter 12kHz 12dB octave Hum and Noise 103dB EQ IN all sliders at 0 position A curve by IHF Protect AC fail safe Power Consumption E 111 10W E 112 19W Dimensions 483 W l33 H 370 L mm 19 W 5 25 H l4 6 L in...

Страница 5: ...ESPONSE Each slider is set at a max position FREQUENCY RESPONSE ex 1kHz slider FREQUENCY FREQUENCY BANDWIDTH CONTROL ex 1kHz slider CENTER FREQUENCY CONTROL ex 1kHz slider FREQUENCY FREQUENCY 4 Performance Graphs ...

Страница 6: ...of 12dB per octave when IN Equalizer switch Placing the switch in the IN position causes the equalizer LED indicator to turn on and provides the frequency response adjusted with the EQ sliders bandwidth controls and centre frequency controls With the switch in the OUT position the equalizer LED goes out and the frequency response is flat just as the EQ sliders allow for a flat response when set to...

Страница 7: ...the fuse of same type and capacity as are instructed Power inlet An accessory power cord connects here A use of the U shaped clamp supplied with the equalizer by inserting it into the holes provided above and below the power inlet is recommended to prevent accidental disconnection of the power cord Ground lift switch The switch is used to avoid earth loop that causes hum noise when the equalizer E...

Страница 8: ... loops may cause hum and noise if care is not taken during connection An increase in noise from ground loops may be minimized by breaking the ground loop Generally the chassis ground of the signal line should be broken as shown below Rack cabinet Main AC Ground When a Y cord is used shorten the wiring to minimize noise Ground lift switches are provided on the rear of the E 111 112 Sliding the grou...

Страница 9: ...quency band is continuously variable within a range of one octave between 0 7fc and 1 4fc Thus the overall frequency response may be delicately adjusted For example if the 1kHz center frequency control has a 12dB boost the frequency response looks like that of curve 1 If the center frequency control is turned anticlockwise the response will be like curve 2 while in the case of it being turned full...

Страница 10: ...f to precisely match center frequencies with the frequencies at which feedback occurs 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 111 112 are effective tools to equalize the room frequency ...

Страница 11: ...ce 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...

Страница 12: ...TOA ELECTRICCO LTD KOBE JAPAN Printed in Japan 133 02 688 3 ...

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