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133-12-037-2C

URL:  http://www.toa.jp/

9. SPECIFICATIONS

* 0 dB = 0.775 Vrms

Note:

The design and specifications are subject to change without notice for improvement. 

• Accessories

Frequency Response

20 Hz to 20 kHz ±1 dB 

Total Harmonic Distortion Less than 0.01% (at 1 kHz, all sliders at 0 position,rated output)

Center Frequency

31.5 Hz, 40 Hz, 50 Hz, 63 Hz, 80 Hz, 100 Hz, 125 Hz, 160 Hz, 200 Hz, 

315 Hz, 400 Hz, 500 Hz, 630 Hz, 4 kHz, 5 kHz, 6.3 kHz, 8 kHz, 10 kHz, 

12.5 kHz, 16 kHz

Rated Input Level

+4 dB* (INPUT LEVEL CONTROL set for 0 position)

Rated Output Level

+4 dB*, 600 Ω load

Maximum Input Level

+20 dB* at 1 kHz

Maximum Output Level

+20 dB* with 600 Ω load

Input Impedance

10 kΩ

Output Impedance

600 Ω

Hum and Noise

–94 dB* (EQ in, all sliders at 0 position, 20 Hz – 20 kHz BPF)

Indicators

A red LED for output and input clipping

A green LED for equalizer IN

A green LED for power ON

A green LED for filter IN

Controls

Equalizer Sliders ±12 dB

Input Level Control ±12 dB

Highpass Filter 12 dB per octave

Adjustable Cutoff Frequency: 15 Hz to 300 Hz

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" x 3.5" x 12.5")

Weight

4.5 kg (9.92 lb)

Security cover  ............................................ 1

Screw for security cover ............................. 2

Short piece ................................................. 2

Fuse  ........................................................... 1

Rack mounting screw ................................. 4

Summary of Contents for E-1231

Page 1: ...tructions in this manual to ensure long trouble free use of your equipment 1 IMPORTANT SAFETY PRECAUTIONS 2 2 SAFETY PRECAUTIONS 2 3 GENERAL DESCRIPTION 4 4 FEATURES 4 5 HANDLING PRECAUTIONS 4 6 NOMENCLATURE AND FUNCTIONS Front 5 Rear 6 7 BLOCK DIAGRAM 7 8 DIMENSIONAL DIAGRAM 7 9 SPECIFICATIONS 8 Accessories 8 TABLE OF CONTENTS ...

Page 2: ...ns 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 Do not install near any heat sources such as radiators heat registers stoves or other apparatus including amplifiers that produce heat Do not defeat the safety purpose of the polarized or groundi...

Page 3: ... the power supply plug never pull on the cord itself Operating the unit with a damaged power supply cord may cause a fire or electric shock When moving the unit be sure to remove its power supply cord from the wall outlet Moving the unit with the power cord connected to the outlet may cause damage to the power cord resulting in fire or electric shock When removing the power cord be sure to hold it...

Page 4: ...n out switch an automatic EQ bypass function provides complete equalization bypass in the event of loss of AC power and an output muting function suppresses turn on turn off transients A security cover is included with the E 1231 to guard against accidental disturbance or intentional tampering when used in fixed installations The E 1231 can be mounted in a standard 19 rack and occupies 3 1 2 of ve...

Page 5: ...ecords 7 Equalizer sliders These sliders are adjusted to tune or equalized the overall frequency response of a sound system 8 Equalizer indicator LED The indicator LED turns on whenever the equalizer IN OUT switch is IN 9 Equalizer IN OUT switch Equalizer switch puts the input signals either in circuit or out of circuit of the equalizer The OUT position provides flat audio response no matter what ...

Page 6: ... connected to other equipment In such cases cut the loop by removing a short piece which should usually be mounted to the terminal Note This ground is not for protective ground 17 Output screw terminal The output terminal is balanced and 600 ohms in output impedance Place the supplied short piece between E and C to convert to unbalanced type 18 Input screw terminal The input terminal is balanced a...

Page 7: ...H C E FUSE AC MAINS PT PEAK 15 V 15 V 12 V POWER EQ EBA HPF LPF LPF SLOPE FILTER H C E EBA INPUT POWER SUPPLY BA 8 DIMENSIONAL DIAGRAM Unit mm in Rear Front Front without security cover Security cover 466 18 35 482 6 19 300 11 81 317 2 12 48 280 11 02 4 7 10 5 Side 76 2 88 4 3 3 48 ...

Page 8: ...ximum Output Level 20 dB with 600 Ω load Input Impedance 10 kΩ Output Impedance 600 Ω Hum and Noise 94 dB EQ in all sliders at 0 position 20 Hz 20 kHz BPF Indicators A red LED for output and input clipping A green LED for equalizer IN A green LED for power ON A green LED for filter IN Controls Equalizer Sliders 12 dB Input Level Control 12 dB Highpass Filter 12 dB per octave Adjustable Cutoff Freq...

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