L-Acoustics La8 4X1800W/4Ohm Digital Amplifier, Dsp, Network

L-Acoustics LA8 Digital Amplifier

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.

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

Following the introduction of the LA-AES3 card and LA-PANEL AES3, LA8 amplified controller and the L-ACOUSTICS K standard have evolved and support AES/EBU digital audio as a standard feature. 

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, 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: 3.84 ms

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