L-Acoustics LA-RAK User Manual page 44

LA-RAK
TOURING RACK
user manual
VERSION 2.0
Reference
Dimensions (W x H x D)
Output power
Max output voltage
Circuitry
Digital Signal Processor (DSP)
Frequency range
Distortion THD+N (typical)
Output dynamic range
Amplification gain
Noise level
Channel separation
Damping factor
Mains input power Load
and current draw
4 Ω
(all channels driven)
8 Ω
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 no longer guaranteed.
Mains ratings
Operating temperature
Circuits protection
Transducers protection
Fans
Indicators
Output Connectors
L-NET connectors
ANALOG INPUTS
Connectors Input
Link
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
Link
USB
Supported Standard
input formats Sampling frequency (Fs)
Word length
XLR cabling Standard
Maximum length
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
Converter Word length
Dynamic range
Distortion (THD+N)
Bandpass ripple
AES/EBU to Switchover conditions
ANALOG Constant delay
fallback Constant level
Revert to AES/EBU
LARAK_UM_EN_2.0
LA8 amplified controller
88,1 (2U) x 483 x 420 mm / 3.5 (2U) x 19 x 16.5 in
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)
150 V (Peak voltage, no load)
Class D
DSP SHARC 32 bits / floating point, 96 kHz sampling rate
10 Hz-20 kHz (±1.5 dB at 8 Ω)
< 0.05 % (20 Hz-20 kHz, 8 Ω, 11 dB below rated power)
112 dB (20 Hz-20 kHz, 8 Ω, A-weighted)
32 dB
-72 dBV (20 Hz-20 kHz, 8 Ω, A-weighted)
> 85 dB (at 1 kHz)
> 600 (8 Ω, 1 kHz and below)
Maximum output power
Nb. of channel Power
4 x 1800 W
4 x 1100 W
LA8 & LA8US: 120/230 V AC (±10 %), 50-60 Hz
From -5°C to +50°C (environment)
Temperature monitoring of transformers and heat-sinks, inrush-current limitation, mains supply
failure and over-voltage detection, output DC protection, output over current protection
L-DRIVE thermal and over excursion monitoring
2 temperature dependent speed-controlled axial fans
LED for Load, Signal, Level (-25 dB, -10 dB, -5 dB), Clip, L-NET, and Mute
2x 4-point SpeakON ® (1/2 and 3/4 output channels) 1x 8-point CA-COM
2x Fast Ethernet RJ45 (in/out)
2 Neutrik female XLR3, IEC 268, ESD protected
®
2 Neutrik male XLR3, IEC 268, ESD protected
®
1 Neutrik female XLR3, IEC 268, ESD protected
®
1 Neutrik male XLR3, IEC 268, ESD protected, electronically buffered, failsafe relay
®
1 Mini-B type female USB, reserved for future applications
AES/EBU (AES3) or coaxial S/PDIF (IEC 60958 Type II)
44.1, 48, 64, 88.2, 96, 128, 176.4, or 192 kHz
16, 18, 20, or 24 bits
XLR3 cables, common or AES/EBU certified
300 m with AES/EBU certified cables and for Fs ≤ 48 kHz
96 kHz (SRC referenced to the amplified controller's internal clock)
24 bits
140 dB
< -120 dBfs
±0.05 dB (20 Hz-40 kHz, 96 kHz)
No clock, loss of lock, invalid audio [validity bit], CRC error, bipolar encoding error, data slip
Yes (upon user selection, independent of input Fs)
Yes (upon user adjustment of AES/EBU input gain, independent of input Fs)
Manual user selection
w w w . l - a c o u s t i c s . c o m
Weight
Mains input power and current draw
1/3 Output Power (-5 dB)
22 A / 3100 W
15 A / 1950 W
LA8JP: 100/200 V AC (±10 %), 50-60 Hz
From -5°C to +85°C (internal)
12.3 kg / 26.9 lbs
1/8 Output Power (-9 dB)
11 A / 1500 W
0.4 A /
10 A / 1300 W 100 W
® (all output channels)
IDLE
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