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Summary of Contents for Toa E 131
- Page 1 Operating Instruction Manual TOA PROFESSIONAL GRAPHIC EQUALIZER Model E 131 TOA ELECTRIC CO., LTD. KOBE, JAPAN...
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Page 2: Table Of Contents
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 corrosive chemicals or liquids such as soft drinks, salt water, etc. 5. Always refer the E 131 to qualified technical service personnel. There are no user serviceable parts inside. -
Page 3: General Description
The E 131 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. Its signal to noise ratio is over 120 dB making the E 131 one of the quietest equalizers on the market. -
Page 4: Specifications
Specifications Frequency Response ±ldB, 20Hz to 20kHz Total Harmonic Distortion Less than 0.2% at 1kHz, all sliders at 0 position, rated output Equalization Center Frequencies 31.5Hz to 16kHz 31.5Hz, 40Hz, 50Hz, 63Hz, 80Hz, 100Hz, 125Hz, 160Hz, 200Hz, 250Hz, 315Hz, 400Hz, 500Hz, 630Hz, 800Hz, 1kHz, 1.25kHz, 1.6kHz, 2kHz, 2.5kHz, 3.15kHz, 4kHz, 5kHz, 6.3kHz, 8kHz, 10kHz, 12.5kHz, 16kHz Rated Input Level... -
Page 5: Performance Graphs
Performance Graphs Frequency Response (Each slider is set at a max or min position) Frequency Response (ex. 800Hz slider) Frequency Response (All sliders are set at a max position) High pass & Low pass Filters – 4 –... -
Page 6: Front Panel
Front Panel Peak Indicator LED The peak indicator LED will glow when the output level reaches 6dB below clipping. It is quite common for the LED to flash on and off during high level operation. However, if the LED remains steadily lighted, the input level control or the output level of associated equipment should be lowered until the LED only flashes at the highest peaks. -
Page 7: Rear Panel
Rear Panel Power Fuse (Fuse 0.5A, 0.3A) Fuse for 220/240V AC operation should be 0.3A and 0.5A for 120V AC. AC Inlet The power cord must be plugged into it. * Power Cord Clamp A plastic covered metal clip is provided to prevent accidental disconnection of the AC power cord. Ground Lift Switch The ground lift switch is effective to avoid ground loops that are often caused in connection with other equipment and that may induce hum. -
Page 8: Input/Output Connections
Input / Output Connections Mixing Console (RX-7) E 131 (L) E 131 (R) Power Amplifier (P 150D) Speaker System (38-SD×2) - 7 -... -
Page 9: Installation Precautions
In any audio system, there are numerous ways by which ground loops can be created. For example, they may occur when the E 131 is mounted in a rack cabinet, or through AC ground when the E 131 is connected with preamps, mixers, etc. These ground loops may cause hum and noise if care is not taken during connection. -
Page 10: Applications
The E 131 is an effective tool to equalize the room frequency response to a flat response and improve sound clarity. For example, suppose that there is a room frequency response as shown below. - Page 11 Applications Equalization for music The Graphic Equalizer is designed not only for use in preventing feedback and equalizing uneven room frequency response to be flat, but also for equalizing frequency response to your tastes and producing favourable sound for you. Fig. 1 shows each frequency band and its corresponding auditory feeling.
- Page 12 TOA ELECTRIC CO., LTD. KOBE, JAPAN Printed in Japan 133-02-674-8...
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