User Guide

The GML 2020 High Resolution Discrete Input Channel sets a new standard in signal
processing. It combines the features of the GML flagship 8200 Parametric Equalizer,
8300 Transformerless Microphone Preamplifier, and 8900 Dynamic Gain Control into a
powerfully pristine single channel unit. The power and functionality of these
revolutionary processors is further coupled with the addition of a front panel musical
instrument input, two position high-pass filter, front panel phantom and phase switching,
and flexible routing options while maintaining the GML standard of performance and
transparency. These advanced circuits, envisioned by George Massenburg, have
benefited from over 30 years of research, limited manufacturing, critical listening
analysis, widespread usage by demanding industry professionals, and continuous
evaluation by the GML Engineering Department.
The GML Model 2020 High Resolution Discrete Input Channel derives its power and
flexibility in large part from its features:
All-discrete, Class-A design; no integrated circuits to compromise the
audio path
DC-servo and premium-grade film coupling; no interstage capacitors to
add distortion or degrade over time; no tantalum electrolytic, ceramic, or
aluminum electrolytic capacitors in the signal path
Transformerless; precision electronically balanced inputs
Designed with GML 9202 low-noise, low-distortion, wide dynamic range,
wide bandwidth precision discrete opamps
DC-servo stabilized direct-coupled output
Multi-input format: Mic, Line, or M/I (front panel musical instrument)
Wide gain range (-10 dB to +70 dB) available on all inputs
Flexible routing: EQ before DYN, EQ to DYN Sidechain, DYN before EQ
High-pass filter; selectable 40 Hz, flat, 100Hz
Front panel Phantom and Phase switches
Link function; allows multiple units to act in concert
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