REALIOS® 9052 Equalizer

The Classic Dick Swettenham Olympic Studios Design

  • All discrete transistor design
  • Wide dynamic range
  • Extremely musical frequency points
  • Single space 500 series module

Originally designed for the Olympic Studios' console by Dick Swettenham with guidance from engineer Keith Grant, this equalizer is a very useful toolbox. It is the sound of records made at Olympic studios in the 60s and 70s and is now available in a 500 series format package.

The 9052 provides extremely musical high and low shelving bands, two mid / low frequency bands of equalization as well as a two position high-pass filter. The equalization points chosen provide instant control over musical timbre.

An addition to the original three transistor makeup gain stage is a class-A transistor output stage which will drive the most demanding of loads. Also included is a step-down input transformer and step-up output transformer which provides 6 dB greater headroom than the 500 series voltage rails would normally allow. (Note the output level specification below.)

REALIOS 9052 Features

  • Peak / trough midrange band
  • Peak low frequency band
  • Separate variable high and low shelves
  • Phase reverse switch
  • Dual frequency high-pass filter
  • Hard bypass

REALIOS 9052 Specifications

  • Input Impedance: 20 kΩ, balanced
  • Output Impedance: less than 50 Ω
  • Max. Output Level: +32 dBu, transformer balanced
  • Gains: Peak 15 dB, Trough -15 dB
  • Frequency Response: +/- 1 dB from 0.15 Hz to 25 kHz
  • Noise Level: better than 74 dB below +4 dBu, 0-30 kHz