well, a typical EQ found in most 3 band EQ setups has an opamp - a few T-filters and another op-amp to buffer the output signal - at best you get +/- 20dB cut/boost which can be barely noticeable in a pedal chain
however this circuit uses attenuators that I've set to cut/boost the 3 typical EQ bands at a more respectable -96dB/+20dB - simply put - you'll bloody notice it.
it's also wired in parallel so if you didn't want 1 of the EQ bands affecting - just leave out the parts on that band
www.paulinthelab.com - Stripboard Layouts