I installed swh-plugins (http://plugin.org.uk/) and cmt (from http://www.ladspa.org), which yielded me 1 eq plugin in kdelive, called "multiband EQ".
But I found the volume setting is quite awkward, i need to enter numbers and it's hard to get any result, if i use the mouse, i can hear a result, but than the effect is way too strong.
also there's not a lot of bands in the higher spectrum. only 5kHz, 10kHz, 20kHz
does anyone know a better EQ? maybe one with a graphical interface?