The Electrodyne 2511 is a dual mono pair of classic two-band discrete transistor reciprocal active inductor equalizers using early ’70s design technology. The custom inductors and output transformer are made by Electrodyne’s original maker to strict factory manufacturing tolerances as small as 2%. This allows consistent equalizer performance and repeatability from channel to channel that was not possible in the Sixties. Smooth performance and equalizer response from minimum to maximum gain at all frequencies provides unusually broad sonic and tonal options not experienced since the 1970s.

All current designs are built following actual original Electrodyne proprietary factory lab and engineering notes. And they have even gone to the trouble to have the designs reviewed and approved by original Electrodyne engineering staff for accuracy and adherence to company design criteria.