L-Acoustics LA4X Amplified Controller with PFC 4×1000-Watt 8-Ohms
L-Acoustics LA4X US Amplified Controller with PFC 4×1000-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 4×4 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
- Analog: 4 balanced analog line inputs with passively connected link
