L-Acoustics LA4X User Manual

Installation
Power consumption
The LA4X power requirements depend on the load impedance and the signal level.
Mains input power and current draw (all channels driven)
Maximum output power 4 × 1000 W at 4 or 8 Ω
1/3 output power (-5 dB) 7 A / 1600 W
1/8 output power (-9 dB) 3 A / 750 W
Idle 0.26 A / 60 W
Standby < 0.1 A / 11 W
Current values given for mains rated at 230 V. Multiply by:
• 2.3 for 100 V
• 1.9 for 120 V
• 1.15 for 200 V
Output power references
A third of the maximum output power corresponds to the worst case scenario of a program source using highly
compressed music or pink noise with amplied controller driven to clip level.
An eighth of the maximum output power corresponds to a loud music program with a small dynamic range and
9dB of headroom (IEC standard power rating).
Heat power calculation
If a 4 Ω load is connected to each output channel of the LA4X, each channel delivers up to 1000 W.
With a standard use at 1/8 of full power (9 dB headroom), the power delivered per channel is:
1000 / 8 = 125 W, so a total power of 4 x 125 = 500 W.
According to the table in section Power consumption (p.21), the LA4X power consumption is 750 W. The heat power
produced is then (difference between power consumption and output power):
750 - 500 = 250 W
Audio and network cabling
Connection panels
The amplied controller's rear side features three panels for audio and network cabling:
• A speaker panel (1) to connect the loudspeakers.
• A signal panel (2) to connect the analog and digital (AES/EBU or S/PDIF) audio sources, and link the signals to
another amplied controller.
• An L-NET panel (3) to connect to a network and be remotely controlled by LA Network Manager.
LA4X audio and network connection panels
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1 2
3
LA4X owner's manual (EN) version 14.1 21

L-Acoustics LA4X Specifications

General

Brand	L-Acoustics
Model	LA4X
Category	Controller
Language	English