From Pete's Place Audio

The Electrodyne 2511 is a classic two-band discrete transistor reciprocal active inductor equalizer using 1969 / 1970 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 eq performance and repeatability from channel to channel that was not possible in the 60,s. Smooth performance and eq response from minimum to maximum gain at all frequencies, provides unusually broad sonic and tonal options not experienced since the 1970,s. 
Input
Active balanced discrete transistor impedance converter.
Output impedance
150 ohms
+/-12 db gain range
Equalize or Attenuate
4 frequencies selectable per band. LF
40, 100, 250, 500hz. HF: 1.5k, 3k, 5k, 10k.

Peak/Shelf function on each band. Shelving at all frequencies, Peaking at 250, 500, 1.5k, 3k and 5k.

Distortion
0.03%typical.
Maximum output
+30db at less than 0.8%thd. (+29.5db at 0.06%thd)
Frequency response
+/- 0.25db, 10hz to 70khz typical.
Signal to noise
-85db typ.

Free 3-Year Warranty

In addition to the standard included manufacturer warranty, virtually all new products carry our exclusive, industry-leading, absolutely free Sound Pure 3-Year Warranty, which includes parts and labor. It's our way of adding real value to the personal touch our small, dedicated team brings to every purchase.

Coverage exclusions live in Terms & Conditions, Section 27. Read the warranty →

Sound Pure Studios Control Room A — Durham, NC

Sound Pure Studios · Durham, NC

Come hear it in our control rooms.

Sound Pure is a working studio in Durham, NC — a 1,000 sq ft live room and two pro control rooms. Book a session to audition gear in a world-class acoustic space before you buy.

$2,550