Products - LA4 - L-ACOUSTICS

Products / LA4

Cutting edge loudspeaker amplification, DSP, network
High-grade 24 bit A/D converters, 130 dB dynamic range
32 bit floating point SHARC DSP, 96 kHz sampling rate
4 channel high efficiency amplifier section fed by 2 inputs
LA4: 4X1000W/4 Ohms, LA8 4X1800W/4 Ohms
Advanced dual IIR/FIR filter algorithms
Exclusive L-DRIVE system protection
Complete onboard L-ACOUSTICS preset library
LA NETWORK MANAGER 2.0 PC software for remote control & monitoring

Download center

FULL RELEASE PACK - 25 MARCH, 2013

PRESETS GUIDE

SYSTEM SPEC SHEET

PRODUCT SPEC SHEET

PRODUCT INFORMATION PACK

USER MANUAL

CAD DRAWING

VISUALS

Technology
About Firmware 2.0.0.2 And Preset Library 3.0
System
Specs
Configurations
Aes-ebu
Testimonials

DSP

Proprietary algorithms are processed in a 32-bit floating point DSP engine at a 96 kHz sampling rate. A dedicated engineering approach combining IIR and FIR filters allows generating perfectly linearized phase curves and significantly improved impulse responses for an even more natural, transparent, and realistic sound experience. Two cascaded 24-bit A/D converters at the front-end yield a ground-breaking encoding dynamic of 130 dB.
The L-DRIVE protection system carries out a dual analysis of signal level in real-time and RMS. Under extreme conditions when component membranes reach the over-excursion zone or if the coil ensemble temperature reaches a critical point, L-DRIVE acts as a power regulator. As a result the amount of power delivered at any channel is adjusted to the dynamic and thermal capacity of each individual transducer. This optimizes the power resources while preserving the highest dynamic range.
With a complete preset library and the possibility of creating additional user presets, the engineer is offered fingertip access to all the usual L-ACOUSTICS® loudspeaker system configurations.

AMPLIFICATION

The four amplifier channels driven by two inputs provide optimum system flexibility. The LA4 and LA8 offer two specific power ranges (4 x 1000 watts into 4 ohms, and 4 x 1800 watts into 4 or 2.7 ohms, respectively) yielding perfect power matching to each individual L-ACOUSTICS® loudspeaker system.
The built-in technologies allow control of the very wide dynamic range found in live audio productions while the high-efficiency components offer superior reliability, all from a sleek ergonomic package with exceptional weight/size ratio.

USER INTERFACE

The front panel user interface features extremely fast access to edit the 2 input and 4 output settings. The encoder wheel gives instant access to the user menus and the LCD screen offers real time visualization of the system parameters.
Command access includes mute, gain, preset selection, plus delay and polarity settings. Navigation through the menu pages is fast and intuitive. Beside the standard on-board preset library, the engineer can design and store his own settings (initialized from a standard preset template) in one of the 10 available user locations.

Firmware update will erase all user data, in particular the presets stored in the amplified controllers. Consequently, before applying any update operation, save personal sessions (or systems) and presets to files using the version of LA NETWORK MANAGER already installed on the computer. These files will be ready to be loaded back after the process is complete.

Product	Functionalities
FIRMWARE 2.0.0.2	- Audio available within 9 seconds after power is turned on - LA8 comes with both LA8 and LA4 presets onboard - Output delay extended to 680 ms per channel - Includes PRESET LIBRARY 3.0. - The Routing (Input Selection) for the output channels can be set from the Preset Parameters menu
LA4/LA8 PRESET LIBRARIES 3.0	- Simplified preset structure thanks to the integration of the product-specific parameters into the L-ACOUSTICS parameters, the use of 0dB gain and 0ms delay default values, and the removal of the preset input parameters - LA4 Presets: [5XT], [KILO], [KIVA_SB15

At the heart of the L-ACOUSTICS® integrated system approach, the LA4 and LA8 amplified controllers offer high performance loudspeaker amplification, DSP, network control and comprehensive system protection in a single ergonomic package. On-board library presets have been developed for immediate use with a minimum of EQ correction, optimized system resources and a unique sonic signature for all systems, a feature particularly beneficial for complex installations.

Based upon similar platforms, the exceptional and groundbreaking performance level delivered by both the LA4 and LA8 allows for full optimization of all L-ACOUSTICS® system resources and delivers outstanding audio quality combined with the best possible transducer protection. LA Network Manager with its intuitive user interface provides a high level of hands-on system control without sacrificing accurate and fast operation under real-world conditions. For fixed installation, external control of the amplified controllers is possible from AMX® and CRESTRON® panels.

RENTAL BENEFITS

High performance and dynamic range for live applications
Touring rack
LA-RAK universal drive platform for the Rental Network
Consistent performance between systems worldwide
Lightweight and compact package for easy storage and transportation
Advanced management of resources for protection and safe operation
Powerful and quick system tuning tools with presets and array morphing
Full digital signal chain with LA-AES3 AES/EBU input card

PERMANENT INSTALLATION BENEFITS

Hybrid presets for power resource optimization
Real-time monitoring of system status via LA Network Manager
High efficiency design (low power consumption and less heat in equipment room)
Compact design for higher amplifier density
External control options in a Network environment (AMX® - CRESTRON® Integrated Partner)
Full digital signal chain with LA-AES3 AES/EBU input card

New optional extension for LA4 and LA8 amplified controllers, LA-AES3 offers one AES/EBU stereo input and one AES/EBU thru port (link) to interconnect LA4 and LA8 to any digital mixing desk or any audio distribution network, while maintaining a fully digital signal path.

Main features:

1 AES/EBU input, compliant with AES3 (AES/EBU) and IEC 60958 Type II (S/PDIF) specifications, ESD protected
Seamless AES/EBU to analog input automatic fallback option, with constant delay
High-quality hardware Sample Rate Converter accepting program sampled from Fs = 44.1 kHz to 192 kHz
Adjustable gain: - 12.0 dB to + 12.0 dB by 0.1 dB steps
1 AES/EBU thru, electronically buffered with failsafe relay, ESD protected
Maximum cable length: up to 300 m (with certified cables dedicated to AES/EBU transport at Fs = 48 kHz).
USB port (reserved for future applications).

Automatic AES/EBU to analog input fallback:

Switchover conditions: no clock, loss of lock, invalid audio (validity bit), CRC error, bipolar encoding error, data slip
Constant delay: yes
Revert to AES/EBU input: upon user selection

Audio Specifications:

Supported input Fs: 44.1 kHz to 192 kHz
Supported word lengths: 16, 18, 20, and 24 bits
SRC output: 24 bits/96 kHz
SRC dynamic range: 140 dB
SRC THD+N: < - 120 dBfs
SRC passband ripple: ± 0.05 dB (20 Hz - 40 kHz at Fs=96 kHz)
Amplifier propagation delay: fixed at 3.4 ms or 3.9 ms1, or all supported input sampling frequency

Dimensions:

H x W x D: 34 x 90 x 115 mm - 1.33 x 3.54 x 4.52 in
Weight (net): 0.112 kg - 0.246 lbs
Finish: black and anthracite gre

Connectors:

AES/EBU input: 1 Neutrik® XLR female
AES/EBU link: 1 Neutrik® XLR male
USB: 1 Mini-B type USB female

Charles Miray System Operator	"The LA4 and LA8 have made my life easier. Firstly, the system set-up is facilitated by their compact and light packaging and so is the audio cabling process. Secondly, the LA-Network Manager software allows remote control on a group of loudspeakers in the same array. This is an undeniable benefit in emergency situations that we often face in the “live” world."
John Moine de Russy Ingénieur en diffusion sonore/Opérateur console www.ingenieuxduson.com	"LA NETWORK MANAGER 1.2 brought many new features. I particularly like the new flexibility with hybrid presets to optimize the number of amplified controllers when I study a sound design"
Sami Ahonen Sound Engineer Old Student House	"I’m using the LA Network Manager’s Array Morphing tool extensively to compensate for the amount of LF energy caused by the room acoustics. This makes my life much easier as I can decrease the low frequency range in a better way without having to use extra EQ"
Paul Van Baasbank Sound Designer & K System Engineer	"The LA Network Manager worked very well, I found the FIR filter especially useful in averaging out the high frequency response of the cabinets near the stage compared to the middle and the far end of the room"
Vladimir Coulibre K System Engineer	"The new Array Morphing really helped me during the tuning phase. I could quickly access and edit the contour of the system even before using any equalisation. This is a time-saver when I need to have identical contours from different complex line source configurations and very useful for covering various audience geometry. I can easily go from my standard system in a big stadium to a slightly adapted contour in the “low-mid” section in a smaller stadium without having to drastically re-EQ my system.”
Andre Bonang Director Tri Tunggal Abadi	"The LA8 and LA4 amplified controllers sound really good; the presets make everything easier and we can make any adjustments using the new contour EQ of the amplified Controller"
Mike Sprague Director of Touring Sound Image	"The LA Network Manager monitoring/control software is brilliant”