Originally designed for the Olympic studiosí 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 A9052 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 (see the output level spec below).
Input Impedance: 20KΩ, balanced
Output Impedance: less than 50Ω
Max. Output Level: +32dBu, transformer balanced
Gains: Peak 15 dB, Trough -15 dB
Frequency Response: +/- 1 dB from 0.15Hz to 25kHz
Noise Level: better than 74dB below +4dBu, 0-30kHz
· Peak / trough midrange band
· Peak low frequency band
· Separate variable high and low shelves
· Phase reverse switch
· Dual frequency high-pass filter
· Hard bypass