iD43 is a passive equalizer inspired by a vintage British design.

iD43 has an adjustable high-pass fiter and 3 adjustable frequency bands: low, mid and high. Original design has several modifications, and we combined the most useful of them into this module. «Presence» filter has an additional frequency (10 kHz) and a «HiQ» switch that changes the width of the frequency band. You can also choose a high shelf filter frequency in the range of 4 to 16 kHz.

iD43 equalizer can work both together with iD73+/iD73 modules (as an integrated EQ) and as a stand-alone unit. In case of independent configuration line input and line output stages are added to the iD43. These input and output are lacking in the case of integrated setup with iD73+/iD73.