Installation
Power consumption
The LA2Xi power requirements depend on the load impedance and the signal level.
Mains input power and current draw (all channels driven)
In SE mode
Maximum output power
4 × 190 W at 16 Ω
4 × 360 W at 8 Ω
4 × 640 W at 4 Ω
1/3 output power (-5 dB)
1.9 A / 330 W
2.9 A / 590 W
3.5 A / 740 W
1/8 output power (-9 dB)
1.2 A / 150 W
1.6 A / 260 W
2.3 A / 430 W
In BTL mode
Maximum output power
2 × 710 W at 16 Ω
2 × 1260 W at 8 Ω
1/3 output power (-5 dB)
2.9 A / 580 W
3.4 A / 710 W
1/8 output power (-9 dB)
1.6 A / 250 W
2.3 A / 440 W
In PBTL mode
Maximum output power
1 × 780 W at 16 Ω
1 × 1400 W at 8 Ω
1 × 2550 W at 4 Ω
1/3 output power (-5 dB)
1.9 A / 320 W
2.9 A / 600 W
3.5 A / 730 W
1/8 output power (-9 dB)
1.2 A / 160 W
1.7 A / 270 W
2.3 A / 440 W
In Idle and Standby (any mode)
Idle
0.5 A / 28 W
Standby
0.4 A / 12 W
Current values given for mains rated at 230 V. Multiply by:
• 2.3 for 100 V
• 1.92 for 120 V
• 1.15 for 200 V
Output power references
A third (1/3) of the maximum output power corresponds to the worst case scenario of a program source using
highly compressed music or pink noise with amplied controller driven to clip level.
An eighth (1/8) 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 LA2Xi in SE mode, each channel delivers up to 640 W.
With a standard use at one eighth (1/8) of full power (9 dB headroom), the power delivered per channel is:
640 W / 8 = 80 W
Therefore, a total power of:
4 × 80 W = 320 W
According to the table in section
Power consumption
(p.19), the LA2Xi power consumption is 430 W. The heat power
produced is then (difference between power consumption and output power):
430 W - 320 W = 110 W
24 V DC Input
The amplied controller's rear side features a 2-point terminal block for external powering of the DSP in case of mains
failure.
LA2Xi owner's manual (EN) version 1.0
19
