GRAPHIC EQUALIZER CALCULATOR

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Graphic EQ CALCULATOR

to calculate Capasitor - Resistor Value & Frequency on Graphic Equalizer design

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C₀:
uF

C_L:
uF

R₀:

Kohm

R_L:
Kohm

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f₀=Hz

Q₀=

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Graphic Equalizer Definition:

A graphic equalizer is a high-fidelity audio control that allows the user to see graphically and control individually a number of different frequency bands in a stereophonic system. A typical graphic equalizer consists of several audio filter/amplifiers, each centered at a specific frequency in the audio range. Most graphic equalizers have two identical sets of filter/amplifiers, one for each channel in a stereophonic system.

The gain (volume) controls in most graphic equalizers are slide potentiometers that are adjusted by moving a control button up or down. Gain is increased by sliding the button upwards. The slide potentiometers for each channel are placed side-by-side, with the lowest-frequency unit at the left and the highest-frequency unit at the right. In this way, the positions of the buttons appear to follow a graphical curve that represents the gain as a function of frequency for each channel.

Graphic equalizers are common in middle- and high-end stereophonic sound systems for consumer use. They are found in practically all professional recording studios. Graphic equalizer programs are also available for use in fine-tuning sound in a personal computer. 

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HOW TO

input value C₀C_LR₀R_L and click on CALC then answer

freq point example:

• 100-200-400-800-1.6K-3.2K-6.4K
• 62-125-250-500-1K-2K-4K
• 50-120-400-500-600-4.5K-10K
• 31-62-125-250-500-1K-2K-4K-8K-16K
• 31.5-63-125-250-500-1K-2K-4K-8K-16K
• 31-44-63-88-125-175-250-500-500-700-1K-1.4K-2K-2.8K-4K-5.6K-8K-11K-16K
• 40-50-63-80-100-125-160-200-250-315-400-500-630-800-1K-1.25K-1.6K-2K-2.5K-3.15K-4K-5K-6.3K-8K-10K-12.5K-16K
• 16-31.5-63-125-250-500-1K-2K-4K-8K-16K
• 16-22.4-31.5-45-63-90-125-180-250-355-500-500-710-1K-1.4K-2K-2.8K-4K-5.6K-8K-11.2K-16K
• 16-20-25-31.5-40-50-63-80-100-125-160-200-250-315-400-500-630-800-1K-1.25K-1.6K-2K-2.5K-3.15K-4K-5K-6.3K-8K-10K-12.5K-16K

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Application

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NB : For LA3600 IC Based, please User R0 = 1.2K    ,    RL=68K

 

Links :

• http://en.wikipedia.org/wiki/Equalization_filter 
• http://www.geocities.jp/dgb_studio/index_e.htm