Main Features; Simplified Block Diagram; Dsp Architecture - L-Acoustics LA8 Manuel Utilisateur

LA8
AMPLIFIED CONTROLLER
User Manual
VERSION 1.2
5.2

Main features

5.2.1

Simplified block diagram

The LA8 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 management of the LA8's resources is performed by an embedded Operating System (Linux) while the auto-
sensing SMPS (Switched Mode Power Supplies) allows weight and size reduction.
5.2.2

DSP architecture

The new proprietary algorithms allows for 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 DSP engine is a SHARC 32 bit floating point DSP at 96 kHz sampling rate offering an enhanced dynamic
range by not generating calculation clips like other fixed point DSPs.
• A special 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 for various system configurations.
• The L-DRIVE transducer protection system offers advanced protection by monitoring both excursion and
temperature of the transducer (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 (see appendix 10.1).
LA8_UM_EN_1.2
Figure 4: LA8's simplified block diagram
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