The multikill was an experiment in DJ performance eqs. It is a line level five band eq with rotary pots instead of sliders. It is designed to be inserted in the master output of a dj mixer to provide more comprehensive equing and effects on the main stereo mix. Each rotary pot has a switch above it (the pic was taken upside down to show the rca connectors). When the switch is up the rotary pot can be used to cut or boost the frequency. When it is down the pot is bypassed completely and has no effect. This way each switch can function as a kill for each frequency (or an instant boost). you set the eq level with the pot and turn it on/off with the switch. With this unit you can "transform" individual frequencies. You can slowly boost a frequency and transform it at the same time. This way you can boost or cut in "steps".

The unit itself is more of a mod than a ground up design. The EQ is a five band Cana-kit. The switch on the side is a general bypass to remove the whole eq from the mix inserts. All the switches really do is act like pots that are in the neutral position. the mod is based on the working principles of the bass kill switches also on this site. It is important to note however, that here the signal does not goes through the switch. The switch and the pot are controls for an active circuit, in this case the eq. The signal travels through this circuit. Also when the rotary pot on a particular frequency is in the center position (no cut or boost) it acts as if it wasn't there. This is what the switches do. They bypass the pots and reconnects the wires as if there were not pots there. This sets each band in the circuit to a neutral position.