gml gml2020 Manual De Usuario
II. Filter
Immediately following the input section of the Model 2020 is an extremely useful and
transparent high-pass filter, which has three optional settings: 40Hz roll-off, flat
response, or 100Hz roll-off. Designed for maximum clarity and musicality, this active
second order Butterworth high-pass filter is implemented with premium-grade film
capacitors, precision metal-film resistors, and a pristine GML 9202 discrete opamp.
Passband response is maximally flat for both the 40Hz and 100Hz selections, while the
Model 2020's ruler-flat frequency response is preserved in the "flat" setting. A second-
order high-pass filter, this circuit creates a -12dB per octave roll-off below the corner
frequency, an appropriately flexible and powerful function since many engineers use the
low-frequency band of a fully parametric equalizer--a Model 8200, for instance--in shelf
mode as a high-pass filter of sorts. The presence of this dedicated filter, then, actually
enables the user to reserve the low-frequency EQ band of the Model 2020 for other
purposes.
transparent high-pass filter, which has three optional settings: 40Hz roll-off, flat
response, or 100Hz roll-off. Designed for maximum clarity and musicality, this active
second order Butterworth high-pass filter is implemented with premium-grade film
capacitors, precision metal-film resistors, and a pristine GML 9202 discrete opamp.
Passband response is maximally flat for both the 40Hz and 100Hz selections, while the
Model 2020's ruler-flat frequency response is preserved in the "flat" setting. A second-
order high-pass filter, this circuit creates a -12dB per octave roll-off below the corner
frequency, an appropriately flexible and powerful function since many engineers use the
low-frequency band of a fully parametric equalizer--a Model 8200, for instance--in shelf
mode as a high-pass filter of sorts. The presence of this dedicated filter, then, actually
enables the user to reserve the low-frequency EQ band of the Model 2020 for other
purposes.
III. Routing
A significant portion of the Model 2020's allure is the tremendous flexibility accorded the
user in determining the internal signal routing of the EQ and Dynamics sections. This
functionality is incorporated in the front panel Routing control, a five-position rotary
switch manufactured to GML's exacting standards.
user in determining the internal signal routing of the EQ and Dynamics sections. This
functionality is incorporated in the front panel Routing control, a five-position rotary
switch manufactured to GML's exacting standards.
Specifically, the Routing control allows the user to configure the Model 2020 in one of
five topologies. Comprising four of the options, the EQ section may feed the Dynamics
section or the Dynamics section may feed the EQ section--in either case, allowance has
been made to accommodate an external sidechain input to the Dynamics section via the
back panel Sidechain In XLR. Additionally, the Dynamics sidechain may source the
output of the EQ, with both sections' audio inputs receiving signal from the input stage.
The latter case disables the external sidechain, is labeled "EQ to DYN SC" on the front
panel legend, and can be useful in ducking or other frequency-dependent dynamic gain
control applications. In all cases, the main Output of the Model 2020 is the direct-
coupled DC-servo corrected output of the final stage, whether that stage is the
Equalizer section or the Dynamics section. There is, therefore, no dedicated output
buffering stage, nor is there a master output level control, unless the Dynamics Output
control is used to provide this function.
five topologies. Comprising four of the options, the EQ section may feed the Dynamics
section or the Dynamics section may feed the EQ section--in either case, allowance has
been made to accommodate an external sidechain input to the Dynamics section via the
back panel Sidechain In XLR. Additionally, the Dynamics sidechain may source the
output of the EQ, with both sections' audio inputs receiving signal from the input stage.
The latter case disables the external sidechain, is labeled "EQ to DYN SC" on the front
panel legend, and can be useful in ducking or other frequency-dependent dynamic gain
control applications. In all cases, the main Output of the Model 2020 is the direct-
coupled DC-servo corrected output of the final stage, whether that stage is the
Equalizer section or the Dynamics section. There is, therefore, no dedicated output
buffering stage, nor is there a master output level control, unless the Dynamics Output
control is used to provide this function.