equalizer design

[benfox]

Hi 

I'm looking for a 3 band equalizer. I've seen a lot of schem based on opamps.
I want a noninteractive band equalizer.
I'l looking for an active way to equalize with trannies and if possible with JFETs.
I've seen that :
http://www.mitedu.freeserve.co.uk/Circuits/Audio/t-ctrl.htm
But it's based on NPN and it seems that it's interacting bands.

Is it stupid to make this with trannies and should i did again this :
http://www.aronnelson.com/gallery/v/STMs-Circuit-Ideas/Three_band_Eq_non_interacting_bands.png.html
witch works ok
so long

[StickMan]

If you are looking to make a set of band-pass filters using transistors, you need to find schematics for "gyrators".

[Morocotopo]

The STM schem works Ok, I made it and it´s very good. I seem to remember that it needs a buffer at the front or at the end, or both, to have the right/not changing  impedances. Don´t remember.

Morocotopo