![]() This is necessary because clearance is limited with the front pannel. First, it's an all-SMD board: easier and cheaper to build. Several modifications were made to allow these improvements. While a graphic equalizer requires a lot of bands, a parametric equaliser is more acurate and usually only two or three filters are enough. A parametric equaliser has 3 controls: gain, frequency and bandwidth. No more cables! A graphic equaliser has only one control per band: the gain. To solve these problems and make the unit more compact I have put everything on a single board, potentiometers included. ![]() It's quite tiedous to build and IMHO prone to noise from within the enclosure. Their design involved three stereo potentiometers per channel, which means a lot of cables from the front panel to the circuit board. This project is based on the parametric equalizer proposed by Elektor in the s and later published in the book "Creations electroniques" in Publisher: Publitronic.
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