Lake LM 44 Loudspeaker Management System

The LM 44 provides a four input/four output analog configuration that is suited for a variety of system signal processing and routing applications. The LM 44 also provides 8 × 8 AES3 digital I/O and 4 × 8 Dante networked I/O, all with comprehensive signal routing to provide Dante break-in / break-out and failover functionality. Two LM 44 units may be stacked and linked to function as an 8 × 8 processor.

LM 44 provides the ultimate combination of input/output signal flexibility and fail-safe operation. Audio inputs are accepted via the Dante network as well as on connectors for AES3 digital and analog.
Simple programming in LAKE Controller allows multiple, user-configured automatic switching scenarios. For example, signals may be distributed over the Dante network, with an AES3 input source failing over to analog – and with the result automatically cascading to all Dante receivers. In addition, the LM Series’ dual-redundant network topology enables seamless switching in case of a problem on one Ethernet link.

LM 44 provides a total of eight input routers which can be independently configured with up to four input fail-over priority settings. And the output of any of these input routers can be patched directly to any analog, AES3 or Dante output – without using any of the valuable Module processing channels.

LAKE Processing
The advanced technology of LAKE Processing provides unparalleled power to shape and optimize sound in a variety of environments, regardless of loudspeaker system,
the venue size or acoustics, or the program material.

Specification

Features
Module configuration
2 Contour or 4 Mesa modules

Channel processing
6 in Contour mode, 4 in Mesa mode

Input routers
8 input routers with 4 priorities in each, seamless failover to lower priorities

Module input mixer
4 ch. for Contour, 8 ch. for Mesa-modules. Mix any ratio between all input routers.

Input processing
Parameteric EQ with Mesa and Ideal Graphic equalizers, both utilizing Raised Cosine algorithms

Output processing
Linear phase or Classic crossovers, Parametric EQ, shelving and all-pass filters

Features
Delay, Mute, Phase, Gain etc.

Limiters
LimiterMax with Peak and RMS limiter. Confi gurable MaxRMSLevel, MaxRMSCorner, MaxRMSAttack, MaxRMSRelease and MaxPeakLevel

SuperModule compatible
Yes

Audio Performance
Conversion resolution
24-bit

Internal Sample Rate / Data path
96 kHz / 32 bit floating point

Product propagation delay
Best case (AES synchronous 96 kHz to AES synchronous 96 kHz via module) 0.871 ms Analog (Analog in to Analog out via module) 1.049 ms Pass thru (Analog in to AES synchronous 96 kHz bypassing module) 0.158 ms

Maximum available user delay
2 seconds

Analog
Inputs and Outputs
4 inputs, 4 outputs

Frequency response, analog-to-digital
+/-0.1 dB, 20 Hz to 20 kHz

Frequency response, digital-to-analog
+/-0.03 dB, 20 Hz to 20 kHz

THD+Noise, inputs
0.00024% typical at 1 kHz

THD+Noise, Outputs
0.00037% typical at 1 kHz

Dynamic range, inputs
116 dB

Dynamic range, Outputs
115 dB

Input impedance
20 kOhm balanced, 10 kOhm unbalanced

Output impedance
50 ohms

Maximum input level
+26 dBu

Input sensitivity - settings for digital full-scale
+12 dBu, +26 dBu

Maximum output level
21 dBu

Crosstalk, inputs
-98 dB, 20 Hz to 20 kHz

Crosstalk, outputs
-98 dB, 20 Hz to 20 kHz

Common mode rejection ratio (CMRR)
>70 dB, 20 Hz to 20 kHz

Dante Audio Network
Inputs and Outputs
4 inputs, 8 outputs

Supported sample rates
48, 96 kHz

Support redundant paths
Glitch-free Dual Redundant Dante using two Ethernet networks

Receiver latency
0.5 ms, 0.8 ms, 1.3 ms, 4 ms

Device presets
Frame presets
100

AES3/EBU (sample rate converters available as desired)
Inputs and Outputs
8 inputs, 8 outputs

Supported sample rates
44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, 192 kHz (I/O individually selectable)

Supported resolutions
Up to 24-bit

THD + Noise
0.00002 % at 96 kHz and 0.00006 % at 44.1 kHz sample rate

Dynamic range
Base48 -140 dBFS, Base44 -125 dBFS

Clocking
Clock selection
Manual or automatic according to priority scheme

Oscillator type / synchronization
High quality VCXO clock can provide Dante master clock or slave. Automatic synchronization with Dante network.

Base48
2 (Primary and SRC)

Base44
1 (SRC)

Clock accuracy
< ± 7 ppm

GPIO
Inputs
2 General Purpose Inputs (GPI) supporting external contact closure

Outputs
2 General Purpose Outputs (GPO) with internal contact closure

Software configurable input control
Standby state, Mute state, Dual preset recall

Software configurable output indication
Standby state, Mute state, Faults, Ready

Back panel Interface
Analog Inputs and Outputs
4 + 4 XLR

AES Inputs and Outputs
DB-25, with selectable termination

Ethernet Ports
Auto 100/1000, Auto uplink, 2 x Neutrik etherCON RJ45 connectors

GPIO
DB-9

Power
Detachable locking 3-pin IEC

Control and monitoring interface
Via Ethernet for Lake Controller software, or DLM (the 3rd party protocol)

Front-panel user interface
Display
Daylight readable monochrome (128 x 64)

Meters
LED for signal level and clip indicators per channel

Mute access
Dedicated Mute button and LED indication per processing channel

Menu
Intuitive and powerful user interface with soft keys

System status indication
LED Fault and Warning indication and detailed description on display

Parameter adjustment
Single/multiple parameter edits with rotary encoder

Power
Nominal voltage
100 – 240 VAC

Operating voltage
70-265 V AC

Power consumption
30 W maximum

Dimensions
Dimensions
483 mm (19"), 44 mm (1 U), 290 mm (11.5")

Weight
Weight
5 kg (11 lbs)

Finish
Finish
Black painted steel chassis with cast alumimum handles