From Prince Fatty's studio. He has this to say about this ultra-rare EQ: '...classic 1950s american passive similar to Pultec. It is unique as you can boost/cut 40hz. Super larger and very good for Kick and Reggae Bass related duties. The gain make up stage is class A/B with Marinair transformer so no gain loss when inserting via patchbay/interface.' EQ258A Program Equalizer for sale. Details are as follows: LIGHT GRAY PANEL, ENGRAVED REQUIRES 3'/2" x 19"PANEL SPACE (5" DEEP) VARIABLE EQUALIZATION AT 6 IMPORTANT POINTS TWO ROTATING CAM SWITCHES FOR HIGH AND LOW FREQUENCY SELECTION 14 DB INSERTION LOSS ROTATING CAM SWITCHES, TWO, FOR SELECTION OF 40 OR 100 CPS AND CHOICE OF 3, 5, 10 OR 15 KCPS 12 DB MAXIMUM BOOST OR 16 DB MAXIMUM ATTENUATION (AT SPECIFIED FREQUENCIES) IN 2.0 DB STEPS PLUG CONNECTOR (ON REAR) BLACK MATTE ESCUTCHEON, ENGRAVED