Unison Research
Unico Due
20
7.
NOTES ABOUT INPUTS
Maximum input voltage:
The particular input stage and volume control circuit design requires that the
following maximum signal levels must not be exceeded:
Line inputs:
15V
pk
Monitor input:
5V
pk
The differences in the way the signal inputs are managed result in a different
maximum level for the “Monitor” input, and a different sonic response.
In the
Unico D u e
, the volume control is managed by a purpose-specific integrated
circuit: this IC contains a programmable precision resistor network that can supply
the desired attenuation level. The same IC also contains an active stage that can
provide gain and low output impedance.
In the configuration used in the
Unico Due
, the active stage has 0dB gain and
acts only as an output buffer.
The control software that manages the resistor network IC has been designed in a way
that the relationship between attenuation and the level indicated follows a logarithmic
curve, typical of the ALPS potentiometers used in traditional Unison Research products.
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