Rupert Neve Designs 551

Rupert Neve Designs 551, 3-Band Inductor (coil) EQ - 500 Series, Low EQ: +/-15 dB shelf or peak, Selectable for 35 Hz, 60 Hz, 100 Hz or 220 Hz, Mid EQ: +/-15 dB with 6 centre frequencies: 200 Hz, 350 Hz, 700 Hz, 1.5 kHz, 3 kHz and 6 kHz, High / Peak switch to increase the Q-factor, Hi shelf: +/-15 dB shelf or peak, selectable for 8 kHz and 16 kHz, Lo cut: 12 dB / octave design at 80 Hz, Rupert Neve custom transformer, Design: API series 500 rack format ...