L-Acoustics LA4X US Amplified Controller with PFC 4x1000-Watt 8-Ohms

The LA4X is an amplified controller based on a 4-input by 4-output architecture and an exclusive green power module providing maximized efficiency. With LA4X, L-Acoustics® speakers can get all the benefits of self-powered speakers, while keeping the versatility of the separated amplification approach. The L-Acoustics systems can be operated in three connectivity modes, as described below.

Specifications:

• Operating conditions:
  • Temperature: Room temperature (from 0º C / 32º F to +50º C / 122º 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 8 Ω)
    • 4 x 1000 W RMS (at 4 Ω)
  • Power supply model: Universal Switched Mode Power Supply (SMPS) with Power Factor Correction (PFC)
  • Power factor: > 0.9 (4 Ω full 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, 8 Ω, A-weighted) - 71 dBV
  • Channel separation (at 1 kHz , 8 Ω) > 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 filters
    • Array 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 8 channels
    • Clock: Synchronized on clock of the connected AVB input stream (up sampling at 96 kHz in case of stream at 48 kHz