7
Set-up and Operation
Auto Standby / Power-up
– LUCIA amplifiers do not have a power
switch. The amplifier 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 amplifier
will power up in two seconds when a signal above the preset
threshold (-54 dBu default) is present at any channel input.
GPIO Configuration
– All LUCIA models provide the default
functionality described below with their General Purpose Inputs
and Output.
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 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).
Amplifier status
- Pins 5 and 6 connect to an internal relay to
provide amplifier fault indication. The relay is closed when the
amplifier is on and operating normally. The relay opens if a fault in
either channel 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 amplifier
firmware. See the full Operation Manual for more information.
Individual volume control
R
R
Common volume control
R
DSP/Matrix Configuration
(LUCIA 120/2M and 240/2M only)
The LUCIA 120/2M and 240/2M include a 4 x 4 mix matrix and a
comprehensive suite of DSP features. In nearly all applications for
this type of amplifier, the included features eliminate the need for an
external mixer or processing unit. Also, the default DSP and matrix
configuration allows “out of the box” installation with no further
configuration required for many typical applications.
Default preset
– The default matrix and DSP configuration is as follows:
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 configuration
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” file included with the download.
USB connection
– A USB connection is provided for firmware
updates and downloading presets to the LUCIA. For complete
information please refer to the full Operation Manual.
Custom configuration
– Please refer to the full Operation Manual
for detailed information on custom configuration of DSP functions
using the LUCIA configuration application.
