L-Acoustics LA4, Руководство пользователя

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LA4
AMPLIFIED CONTROLLER
User Manual
VERSION 1.1
LA4_UM_ML_1.1
w w w . l - a c o u s t i c s . c o m
12 en
5.2 Main features
5.2.1 Simplified Block diagram
The LA4 combines in a 2U lightweight chassis the resources of a 2 IN / 4 OUT DSP engine driving four channels of
amplification, a flash memory for preset storage and management, a front panel user interface, a Fast Ethernet device
for network remote control, high performance A/D-D/A converters for audio signals, and an optional digital audio card
(this option will be available as a future development).
The administration of the LA4’s resources is performed by an embedded Operating System (Linux) while the auto-
sensing SMPS (Switched Mode Power Supplies) of the LA4 allows for weight and size reduction.
Figure 4: LA4’s simplified block diagram
5.2.2 DSP Architecture
The new proprietary algorithms are allowing optimum performance and protection of each individual transducer of the
L-Acoustics system in use for an even more natural, transparent and realistic sound experience.
•
The engine is a SHARC 32 bit floating point DSP at 96 kHz sampling rate that offers an enhanced dynamic
range by not generating calculation clips like other fixed point DSPs.
•
A specialised engineering approach combining IIR and FIR filters generates a perfect linearization of phase
curves and therefore a significant improvement of the system impulse response.
•
The 2 x 4 matrix architecture offers flexibility and allows for adapted system configuration.
• The L-DRIVE transducer protection system offers ultimate protection by monitoring both excursion and
temperature of the transducer (for more information about the L-Drive see section 7.7).
• With 89 factory presets and 10 user memory locations, the engineer is offered fingertip access to all the usual
L-ACOUSTICS speaker system configurations (please refer to appendix 10.1 for a complete preset library
description of the LA4).