8
Set-up and Operation
Auto Standby / Power-up
LUCIA ampliiers do not have a power switch. The ampliier will turn
on automatically when AC power is connected to the unit; it will go
into standby mode if no signal is present at any input for 20 minutes.
When in standby, the ampliier will power up in two seconds when a
signal above the preset threshold (-54 dBu default) is present at any
channel input.
GPIO Configuration: Two Ouput Low Impedance Models
Default functionality is as described below for General Purpose
Inputs and Output (GPIO).
Remote volume control
– The default functionality for the GPI is
independent control of output volume; please note that this control is
in series with the control of from the front panel. There are two ways
to do this:
• Connect a GPO from a control device that outputs 0 – 3.3 V
for control. Their grounds also need to be connected; see full
Operational Manual for further instructions.
• Connect a remote volume control potentiometer per channel to
pins 1 through 4 of the GPIO connector as shown below.
(The Vcc voltage output is 3.3 V).
Ampliier status
– Pins 5 and 6 connect to an internal relay to
provide ampliier fault indication. The relay is closed when the
ampliier is on and operating normally. The relay opens if a fault in
either the output channel(s) or in the power supply interrupts normal
operation of one or both channels.
Optional GPIO modes
– The Matrix models allow other GPIO
functions to be enabled by applying changes to the ampliier
irmware. See the full Operation Manual for more information.
Individual volume control
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Common volume control
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GPIO Configuration: One Output 70V Models
The Default functionality is as described below for General Purpose
Inputs and Output (GPIO).
Remote volume control
– Connect a remote volume control
potentiometer to Ground, GPI1 and Vcc as shown in the diagram
following. Volume control is after input mixing. (The Vcc voltage
output is 3.3 V).
Ampliier wake-up
– Connect an external contact closure to
Ground and GPI2 as shown in the diagram following. Wake-up
happens within 0.5 s after contact closure.
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DSP/Matrix Configuration
The LUCIA models include a mix matrix and a comprehensive suite
of DSP features. In nearly all applications for this type of ampliier,
the included features eliminate the need for an external mixer or
processing unit. Also, the default DSP and matrix coniguration
allows “out of the box” installation with no further coniguration
required for many typical applications.
Default preset
– The default matrix and DSP coniguration is as
follows for the M models:
SPEAKER 1 = IN 1; volume attenuated with GPI 1 (and front knob)
SPEAKER 2 = IN 2; volume attenuated with GPI 2 (and front knob)
Out 3 = In 1 (-6 dB) + In 2 (-6 dB); volume attenuated with GPI 1
Out 4 = In 1 (-6 dB) + In 2 (-6 dB); volume is not affected by GPI
Software download and installation
– Very intuitive coniguration
software is available that allows selection of which preset to use
(optimized for different loudspeakers) and what dynamics processing
to use. This application is available for free download from
www.labgruppen.com/support. Follow installation instructions on
the “Read Me” ile included with the download.
USB connection
– A USB connection is provided for irmware
updates and downloading presets to the LUCIA. For complete
information please refer to the full Operation Manual.
Custom coniguration
– Please refer to the full Operation Manual
for detailed information on custom coniguration of DSP functions
using the LUCIA coniguration application.