Electrodyne 2511

Electrodyne 2511 Like the Electrodyne 511, the 2511 is a two-channel, two-band, discrete transistor, reciprocal, active inductor-based equaliser using late-60s/early-70s design technology.

As with the 2501, the 2511’s custom inductors and output transformer are made by Electrodyne’s original provider to strict factory tolerances as small as two percent. This affords a consistent EQ performance and repeatability from channel to channel that was simply not possible in the 1960s. Smooth performance and EQ response from minimum to maximum gain at all frequencies provides unusually broad sonic and tonal options not experienced since the 1970s.

The module’s faceplate sports two sets of twin large rotary EQ controls each offering ±12dB of boost and cut with four selectable frequencies per band (LF: 40Hz, 100Hz, 250Hz and 500Hz/HF: 1.5, 3, 5 and 10kHz). Shelving is available on all frequencies, with peaking offered at 250Hz and 500Hz in the LF band and 1.5kHz, 3kHz and 5kHz in the HF band. An EQ in/out switch with accompanying LED on each channel rounds out the front panel feature set. The unit delivers a maximum output of almost +30dBm into 600 ohms paired with extremely low distortion specs, high signal-to-noise ratio and wide dynamic range.

The Electrodyne 2511 equaliser is set at US$2,300.