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L-Acoustics LA4X (LA4X US)

Amplified Controller with PFC 4 x 1000 W /8 Ohms. Ethernet Network. AES/EBU

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Item Number 
LAC-LA4XUS
Vendor Part
LA4X US

The L-Acoustics LA4X is an amplified controller based on a four input by four output architecture combining the benefits of the self-powered speaker packages with the flexibility of outboard DSP and amplification. L-Acoustics loudspeaker enclosures can be driven by the LA4X in three different modes: "a la carte" - where the 4 inputs/4 outputs are allocated to passive enclosures in a one-to-one link; "full active" - a fully discrete power and DSP drive for active enclosures; and "conventional" - connecting multiple enclosures in parallel.

The LA4X features a green SMPS power supply with PFC. Its high efficiency class D amplification is capable of delivering 4 x 1000W power at 8Ω or 4Ω with class-leading hold times. Other notable features include AES/EBU as standard and extensive DSP resources per output: 1000 ms of delay, a comprehensive EQ station including the exclusive Array Morphing tool together with 8 IIR, 3 FIR, and air absorption compensation filters, and advanced L-DRIVE protection - all with Ethernet networking and a powerful yet simple to use interface backed by a firmware with ultra-fast start-up time.

L-Acoustics LA4X Features:

  • Loudspeaker amplification, 96 kHz/32 bit DSP, Ethernet network
  • L-Acoustics preset library
  • 4-channel class D amplification fed by 4 inputs (analog or AES/EBU)
  • Green SMPS power supply with PFC
  • 4 x 4 DSP engine
  • 4-channel power amplification & power supply
  • 4 x 1000W power at 8 or 4 Ohms for 200 ms
  • EQ station with 11 EQ (IIR/FIR) filters & 1000 ms delay per output
  • Air absorption compensation filter
  • Exclusive L-DRIVE system protection
  • 5-second start-up time
  • LA NETWORK MANAGER 2.2 PC software for remote control & monitoring

Specifications for the L-Acoustics LA4X

{ "Operating conditions" : { "Temperature" : "Room temperature (from 0° C / 32° F to +50° C / 122° F)" }, "Amplification and power supply" : { "Amplification class" : "Class D", "Output power EIA(1% THD, 1 kHz, all channels driven)" : [ "4 x 1000 W RMS (at 8Ω)", "4 x 1000 W RMS (at 4Ω)" ], "Power supply model" : "Universal Switched Mode Power Supply (SMPS)with Power Factor Correction (PFC)", "Power factor" : "> 0.9 (4Ωfull power)", "Mains rating" : "100 - 240 V~ ±10%, 50-60 Hz", "Nominal current requirements" : "20 A for 100-120 V, 10 A for 200-240 V" }, "Audio specifications" : { "Frequency response 20 Hz - 20 kHz" : "± 0.25 dB at 8 Ω", "Distortion THD+N (20 Hz - 10 kHz)" : "< 0.05% , at 8 Ω, 11 dB below rated power", "Noise level (20 Hz - 20 kHz, 8Ω, A-weigthed)" : "- 71 dBV", "Channel separation (at 1 kHz , 8Ω)" : "> 80 dB", "Latency (for both analog and digital inputs)" : [ "Standard operating mode: 3.84 ms", "Low latency operating mode: 0.76 ms" ] }, "DSP" : { "Digital Signal Processor (DSP)" : "SHARC 32 bit, floating point, 96 kHz sampling rate", "I/O routing" : "Flexible 4x4 routing matrix", "Per output channel" : [ "Built-in EQ station with 8 IIR, 3 FIR EQ filtersArray morphing (LF contour, zoom factor)", "Air absorption compensation filters", "Internal IIR and FIR EQ algorithms for speaker phase linearization and improved impulse responses", "L-DRIVE protection (excursion, temperature and over-voltage)" ], "Output delay" : "0 ms to 1000 ms", "Transducers protection" : "L-DRIVE: excursion / temperature / over-voltage" }, "Circuits protection" : { "Mains and power supply" : "Over and under voltage / over temperature / overcurrent (inrush current protection)", "Power outputs" : "Over current / short circuit / over temperature", "Cooling" : "Cooling fans with temperature control speed" }, "Inputs" : { "Analog" : { "4 balanced analog line inputs with passively connected link" : { "A/D conversion" : "4 cascaded 24-bit analog/digital converters (130 dB dynamic range)", "Input impedance" : "22 kΩ(balanced)", "Max. input level" : "22 dBu (balanced, THD 1%)" } }, "Digital" : { "2 AES/EBU inputs (4 channels) with electronically buffered link and failsafe relay" : { "Standard" : "AES/EBU (AES3)", "Sampling frequency (Fs)" : "44.1, 48, 64, 88.2, 96, 128, 176.4 or 192 kHz", "Word length" : "16, 18, 20 or 24 bits", "Synchronization" : "Signal resampled to internal clock at 96 kHz", "Sampling frequency" : "96 kHz (SRC referenced to the amplified controller internal clock)", "Dynamic range" : "140 dB", "Distortion (THD+N)" : "< -120 dBfs", "Bandpass ripple" : "± 0.05 dB (20 Hz - 40 kHz, 96 kHz)", "Fallback mode" : "AB to CD: digital to analog / digital to digital", "Switchover conditions" : "No clock, loss of lock, CRC error, bipolar encoding error or data slip", "Constant delay" : "Independent of input Fs", "Constant level" : "Upon user setting of AES/EBU gain, independent of input Fs", "Input gain" : "-12 dB to +12 dB, 0.1 dB steps" } }, "AVB inputs" : { "Stream capacity" : "One class A stream", "Latency" : "2 ms (typical, depends on talker) format IEC 61883-6 AM824 at 48 kHz or 96 kHz", "Channel count " : "4 channels from one stream that may contain up to 16 channels", "Clock" : "Synchronized on clock of the connected AVB input stream (upsampling at 96 kHz in case of stream at 48 kHz)" } }, "Remote control and monitoring" : { "Network connection" : "Dual-port Ethernet Gigabit interface, Avnu certified bridge fowarding up to 32 streams", "L-Acoustics remote control software" : "LA Network Manager", "Third-party management solutions" : "SNMP / Extron® /Crestron®" }, "Physical data" : { "Height" : "2U", "Weight" : "11.3 kg / 24.9 lb", "Protection rating" : "IP3x" } }