L-Acoustics LA4X 4-Channel Amplified Controller

This product needs to be bundled with L-Acoustics loudspeakers. Please contact our sales team for more information.

System amplifier (class D) with an output power of 4 x 1,000 W RMS into 4 or 8 ohms, A/D converters and integrated DSP processor. Flexible 4 x 4 matrix with 4 inputs and 4 outputs. Power supply via SMPS (Switched Mode Power Supply) with power factor correction (PFC). Heat dissipation by temperature-controlled fans. SpeakONTM speaker connectors. Ethernet connectors to pass AVB audio and for remote control and monitoring. Analog and digital (AES/EBU) audio inputs with links. Front panel user interface with display. DSP provides IIR and FIR filters, delay adjustments, contour filters, and air absorption compensation filters. Protection against thermal overload and over-excursion. Built-in library with factory presets for all manufacturer's loudspeakers and 10 user memory locations.

Ethernet based control network with up to 1 Gbit/s. Support of digital audio signal transmission via the Milan AVB protocol. "Automatic fallback" options from digital to digital or digital to analog. Design of control networks with up to 253 controller power amplifiers in star, daisy chain or hybrid arrangement. The controller power amplifiers and computers in the network are connected via CAT5e U/FTP or higher, with standard RJ45 connectors. The network management software can be run on both Windows and Mac OS X and is designed to include component load, signal levels, limiter activity, overloads, and fault messages. It is also used to manage presets, as well as to adjust input gain, mute, delay correction and filtering. Possible integration into higher-level media control systems by means of software modules.

Specifications:

Amplification:
- Output power (no limiter 200 ms sine bursts,1 kHz, < 1% THD, all channels):
  - 4 x 1000 W at 8 or 4 ohms
- Maximum output voltage: 150 V (peak voltage)
- Amplification class: High-efficiency Class D
- Architecture: 4 in x 4 out
- Frequency range: 20 Hz - 20 kHz (+/- 0,25 dB, 8 ohms)
- Distortion THD+N: < 0.05% (20 Hz - 10 kHz, 8 ohms, 11 dB below rated power)
- Output dynamic range: 110 dB (20 Hz - 20 kHz, 8 ohms, A-weighted)
- Noise level < -71 dBV (20 Hz - 20 kHz, 8 ohms, A-weighted)
- Amplification gain: 32 dB
- Channel separation: > 80 dB (1 kHz, 8 ohms)
- Output delay: adjustable from 0 to 1000 ms
DSP:
- SHARC 32-bit, floating point, 96 kHz Sampling frequency
- Routing inputs/outputs: flexible 4 x 4 routing and summation matrix
- Latency for analog and digital inputs:
  - In standard operating mode: 3.84 ms
  - In low latency operating mode: 0.76 ms
Analog input:
- 4 channels
- Input impedance: 22 kOhm (balanced)
- Maximum input level: 22 dBu (balanced, THD 1%)
- 4 cascaded 24-bit A/D converter (128 dB dynamic range, 20 Hz - 20 kHz, A-weighted)
Digital input:
- 4 channels with active link and failsafe relay
- Standards: AES/EBU (AES3) or S/PDIF
- Supported Sampling frequency: 44.1 kHz to 192 kHz
- Word length: 16 to 24 bits
Sample Rate Converter (SRC):
- Sampling frequency: 96 kHz
- Word length: 24 bits
- Dynamic range: 140 dB
- Distortion THD+N: < -120 dBFS
Input gain:
- Range: -12 dB to + 12 dB
- Steps: 0.1 dB
AVB input:
- MILAN™-certified
- 4 channels 48 kHz / 96 kHz from 1 stream of up to 8 channels
- Standards: Ethernet AVB IEEE 802.1BA-2011, Number: 1, Class: A
- Latency: 2 ms max
- Formats: AAF PCM32 or IEC 61883-6 AM824 at 48 kHz or 96 kHz
- Clock: synchronized on clock of the connected AVB input stream
Connectors:
- Analog inputs: 4 sym. 3P XLR fem. line inputs with passively connected 3P XLR male link output.
- Digital inputs: 2 AES/EBU inputs 3P XLR fem. (2 channels) with electronically buffered 3P XLR male link output and fault signal relay
- Dual-port Ethernet Gigabit interface with 2 x RJ45/etherCON 1 Gb/s
- Power supply: PowerCon 100 V AC - 240 V AC +/- 10%, 50 Hz - 60 Hz
- Loudspeaker outputs:
  - 4 speakON 4P for Out 1 to 4
  - 2 speakON 2P for Out 2 and 4
Display:
- 2 x 24 characters LCD display
- Information LED: power, network, status
- Output channels LED: mute, load, signal, level, limit/clip
- Power button, channel selection button, menu buttons, encoder wheel
Third-party management solutions:
- QSC Q-SYS™
- Crestron®
- Extron®
- SNMP (Simple Network Management Protocol)
Operating conditions:
- Operating temperature: between 0 °C / 32 °F and 50 °C / 122 °F
- Cooling system: 2 integrated, temperature-controlled fans
Physical data:
- Dimensions (W, H, D): 483 mm, 88 mm, 420 mm / 19 in, 3.5 in, 16.5 in
- Rack mounting: 2U
- Weight (net): 11.3 kg / 24.9 lb
- IP: IP3x
- Finish: Black

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