EQ52 Owner’s Manual
5/2021
5
INTRODUCTION
Welcome, and congratulations on your interest in the EQ52 Equalizer! It has been crafted to
provide extremely high quality audio and a simple user interface that requires minimal effort to
optimize.
The EQ52 contains extremely versatile and musical sounding high pass, low pass and see-
saw filters with a simple and intuitive user interface. Expert circuit design and top quality
components realize an outstanding equalizer that is ideal for individual tracks or for mixing and
mastering stereo signals when the modules are used in pairs.
The unit features differential input and output. Both input and output can operate in differential
or single-ended, unbalanced modes. A high current active output buffer mimics the behavior
of a transformer, providing constant gain for balanced or unbalanced operation, when either
the positive or negative output signals are grounded. Therefore, the output can drive
differential or single ended output with no extra user configuration needed.
The simple controls and circuit layout belie the finely tuned and expertly engineered design.
Extremely high input common mode rejection capability is realized, even down to critical power
supply frequencies. High qualify film caps, low distortion resistors and excellent quality
integrated active stages realize a high headroom, low noise, and low distortion equalizer with
superb audio quality that is ideal for individual tracks or for mixing and mastering stereo
signals.
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