L-Acoustics LA8 User Manual - page 51
LA8_UM_EN_4-0
w w w . l - a c o u s t i c s . c o m
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SPECIFICATIONS
SPECIFICATIONS
SPECIFICATIONS
SPECIFICATIONS
GENERAL
Dimensions (W x H x D)
483 x 88,1 (2U) x 428 mm
19 x 3.5 (2U) x 16.8 inch
Weight
12.7 kg / 27.9 lbs
Finish
Black and anthracite gray
Output power
EIA (1% THD, 1 kHz, all channels driven)
4 x 1100 W at 8
Ω (4 x 1300 W peak) / 4 x 1800 W at 4 Ω (4 x 2500 W peak)
Max output voltage
150 V
(Peak voltage, no load)
Circuitry
Class D
Digital Signal Processor (DSP)
DSP SHARC 32 bit / floating point, 96 kHz sampling rate
Frequency range
10 Hz-20 kHz (±1.5 at 8 Ω)
Distortion THD+N (typical)
< 0.05 % (20 Hz-10 kHz, 8 Ω, 11 dB below rated power)
Output dynamic range
112 dB (20 Hz-20 kHz, 8 Ω, A-weighted)
Amplification gain
32 dB
Noise level
-72 dBV (20 Hz-20 kHz, 8 Ω, A-weighted)
Channel separation
> 85 dB (at 1 kHz)
Damping factor
> 600 (8 Ω, 1 kHz and below)
Mains input
power and
current draw
(all channels
driven)
Maximum output
power
Mains input power and current draw
Load
Nb. of channels
Power
1/3 Output Power (-5 dB)
1/8 Output Power (-9 dB)
ID
E
4 Ω
4 x
1800 W
22 A / 3100 W
11 A /
1500 W
0.4 A /
100 W
8 Ω
4 x
1100 W
15 A / 1950 W
10 A / 1300 W
The current values are given for mains rated at 230 V. Multiply by 2 for 120 V, 1.15 for 200 V, and 2.3 for 100 V.
If the voltage outsides a plus or minus 10 % range, the maximum power is
o longer g
arant
ed.
Mains ratings LA8 & LA8US: 120/230 V AC (±10 %), 50-60 Hz LA8JP: 100/200 V AC (±10 %), 50-60 Hz
Operating temperature
From -5°C to +50°C (environment)
From -5°C to +85°C (internal)
Circuits protection
Temperature monitoring of transformers and heat-sinks, inrush-current limitation, mains supply
failure and over-voltage detection, output DC protection,output over current protection
Transducers protection
L-DRIVE thermal and over excursion monitoring
Fans
2 temperature dependent speed-controlled axial fans
Indicators
LED for Load, Signal, Level (-25 dB, -10 dB, -5 dB), Clip, L-NET, and Mute
Output Connectors
2 x 4-point SpeakON
®
(1/2 and 3/4 output channels) 1 x8-point CA-COM
®
(all output channels )
L-NET connectors
2 x Fast Ethernet RJ45 (in/out)
ANALOG INPUT
Connectors
Input
2 Neutrik
®
female XLR3, IEC 268, ESD protected
Link
2 Neutrik
®
male XLR3, IEC 268, ESD protected
Input impedance
22 kΩ (balanced)
Max input level
22 dBu (balanced, THD 1 %)
Latency 3.9 ms
Digital conversion Two cascaded 24 bit A/D converters (130 dB dynamic range)
DIGITAL INPUT
Connectors
Input
1 Neutrik
®
female XLR3, IEC 268, ESD protected
Link
1 Neutrik
®
male XLR3, IEC 268, ESD protected, electronically buffered, failsafe
relay
USB
1 Mini-B type female USB, reserved for future applications
Supported
Standard
AES/EBU (AES3) or coaxial S/PDIF (IEC 60958 Type II)
input formats
Sampling frequency (Fs)
44.1, 48, 64, 88.2, 96, 128, 176.4, or 192 kHz
Word length
16, 18, 20, or 24 bits
XLR cabling
Type
Standard XLR cables or AES/EBU certified cables
Maximum length
300 m with AES/EBU certified cables and for Fs ≤ 48 kHz
Input gain
Adjustable from -12 dB to +12 dB by 0.1 dB steps
Latency
3.4 ms or 3.9 ms (upon user selection, independent of the input sampling frequency)
Sample Rate
Sampling frequency
96 kHz (SRC referenced to the amplified controller’s internal clock)
Converter
Word length
24 bits
Dynamic range
140 dB
Distortion (THD+N)
< -120 dBfs
Passband ripple
±0.05 dB (20 Hz-40 kHz, 96 kHz)
AES/EBU to
ANALOG
Switchover conditions
No clock, loss of lock, invalid audio [validity bit], CRC error, bipolar encoding
error, data slip
fallback
Constant delay
Yes (upon user selection, independent of input Fs)
Constant level
Yes (upon user adjustment of AES/EBU input gain, independent of input Fs)
Revert to AES/EBU
Manual user selection