L-Acoustics LA4X 4-Channel Amplifier

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.

For applications requiring a high count of loudspeaker enclosures with optimized cost of amplification, the LA4X can efficiently
operate as a conventional amplified controller driving speakers in parallel from its four amplification channels, with the added
benefit of the 4 inputs when using passive loudspeaker enclosures.

Packaged in a 2U chassis, LA4X integrates powerful DSP resources with built-in loudspeaker optimization tools and the
proprietary L-DRIVE system to protect the loudspeakers and the amplified controller. In addition to analog and AES/EBU
inputs, LA4X features Milan-AVB audio network connectivity.

• Universal SMPS power supply with Power Factor Correction (100–240 V operation)
• 8 IIR + 4 FIR linear-phase EQ filters per output channel
• Ultra-low latency operation down to 0.84 ms
• Dual etherCON Gigabit network ports for audio, control, and monitoring
• Integration support for LA Network Manager, Q-SYS, Crestron, Control4, Savant, SNMP, and Extron platforms

Amplification & Power Supply

Amplification Class

• Class D

Output Power (All Channels Loaded)

• 4 × 1000 W @ 4 Ω
• 4 × 1000 W @ 8 Ω

Power Supply

• Universal Switched Mode Power Supply (SMPS)
• Power Factor Correction (PFC)

Mains Rating

• 100–240 V AC ±10%
• 50–60 Hz

DSP & Processing

Digital Signal Processor

• SHARC® 32-bit floating-point DSP
• 96 kHz sampling rate

Routing

• Flexible 4 × 4 routing matrix

Per-Output Processing

• 8 × IIR EQ filters
• 4 × FIR linear-phase EQ filters
• Array Morphing
• Air Absorption Compensation filters
• Internal IIR and FIR EQ algorithms
• L-DRIVE® advanced system protection
• Output delay: 0–1000 ms

Technologies

Loudspeaker Management

• L-DRIVE® advanced system protection

Latency

Standard Latency (Analog/Digital Inputs)

• 3.84 ms

Low-Latency Mode (Analog/Digital Inputs)

• 0.84 ms

Audio Inputs

Milan-AVB

• 4 channels from 1 stream (up to 8 channels available)

AES/EBU

• 4 channels AES/EBU
• 2 × AES3 inputs
• Integrated Sample Rate Conversion (SRC)

Analog

• 4 input channels

Connections

Network

• 2 × etherCON Gigabit Ethernet ports (1 Gb/s)
• Audio networking, control, and monitoring

Audio Input Connectors

• 4 × Female 3-pin XLR
• Switchable Analog / AES3

Audio Link Connectors

• 4 × Male 3-pin XLR link outputs

Loudspeaker Outputs

Speaker Connections

• 4 × SpeakON®

Protection Systems

Mains & Power Supply Protection

• Over-voltage protection
• Under-voltage protection
• Over-temperature protection
• Overcurrent protection

Power Output Protection

• Overcurrent protection
• Short-circuit protection
• Over-temperature protection

User Interface

Display & Status Indicators

• LCD display
• LED status indicators

Front Panel Controls

• Rotary encoder
• Power key
• Mute keys

Control & Monitoring

Native Management Software

• LA Network Manager

Third-Party Integration

• Q-SYS®
• Crestron®
• Control4®
• Savant®
• SNMP
• Extron®

Operating Conditions

Operating Temperature

• 0°C to +50°C (32°F to 122°F)

Physical Specifications

Rack Height

• 2U

Weight

• 11.3 kg (24.9 lb)

Protection Rating

• IP30