Have you collect the equalizer as well? No? Why? Too complicated schemes, too many elements, and complex printed circuit boards? Well, not so bad.
The following, I will tell you how you can build a very good equalizer with a minimal set of components that do not require any configuration, with mocking simple printed circuit board, but at the same time having a very decent options, fully worthy of the car amp or a small home industry. The basis of the equalizer is a dedicated IC LA3607, manufactured by nebezysvestnoy Sanyo, more precisely, its semiconductor division.
The characteristics of the equalizer as follows:
Supply voltage 9B
Current consumption of signal 7mA
Adjusting the number of bands 7
Depth adjustment + /-12dB
Conv. gain 0.8
Conv. harmonic distortion 0.02%
So, in the scheme, two components - a chip itself, and seven bandpass filters consisting of two capacitors and one resistor, which, strictly regulated and increase or decrease the selected frequency. If the selected capacitor regulated following bands: 60Hz, 150Hz, 400Hz, 1kHz (davit!), 2.5 kHz and 15kHz 6kGts.
Of course, they can be counted on other frequencies. And there is a very simple formula:
The resonant frequency is as follows:
Since R0 and R hide inside the chip and is 1.2 ohms and 68 ohms respectively, the formula can be simplified to the following:
Values in the formula can be substituted or microfarads and kiloomah, then we get the output of kilohertz, or Faraday, and ohms, then we hertz.
Well, the quality factor of each filter is as follows:
Given the above circumstances, we find:
Capacity in this formula can be substituted with anything - dimensionless figure of merit.
Nourish all that stuff you need from a stabilized source, which can collect, such as KREN9A. Oh, and I hope it is clear that the diagram shows a diagram of one channel, but if you have a few - two, for example, it is necessary to collect two of the same channel here.
