A & E Specifications

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Item no. AES-DSERIES1204L_V3 - 22.02.2018
Overview
The unit shall incorporate two core elements: a four-in/four-out
digital loudspeaker drive processor and a four-channel, high-output
power amplifier platform. Additional facilities shall include on-board
surveillance and load monitoring capability; Ethernet-based audio
networking and control; third-party control system compatibility
using custom middleware; and comprehensive system configuration
and control using
a PC software interface supplied with the unit. The
included integrated software package also shall include a custom
amplifier configuration interface and additional features to expedite
system design, specification and commissioning.
Digital Loudspeaker Processing
Maximum total power output (all channels driven) shall be 12,000 W
or 3,000 W per channel nominal at 4 ohms. Maximum output into
a 100 V high-impedance distributed system also shall be 3000 W.
Maximum peak output voltage shall be 194 V and maximum output
current shall be 67 A. The amplifier topology shall allow flexibility
in output power management, with the capability to allocate total
available power across output channel
s as needed for the application.
The amplifier shall incorporate power factor correction (PFC) to
reduce requirements on the mains distribution system. Amplifier
gain shall be digitally configurable from 22 dB to 44 dB. The unit shall
exhibit the following performance parameters: Frequency response
shall be 20 Hz – 20 kHz ± 0.05 dB (1 W into 8 ohms). Dynamic range
shall be >114 dB. Propagation delay shall not excee
d 1.61 ms for
AES3 input (96 kHz) or 1.68 ms for analog input. The unit shall
incorporate a DSP-implemented zero overshoot voltage peak limiter
adjustable per channel for voltage threshold and profile.
The unit shall include facilities for status surveillance and load
monitoring consistent with international standards for use in mission-
critical voice evacuation systems. Circuits and sensors shall be
provided for warning and protection of VHF (very high frequencies),
DC at output, over-temperature, open load, excessive current, and
voltage peak clipping.
Connectors and User Interfaces
Power Supply, Protection and Coolin
g
The power supply shall be a universal regulated, switch-mode type
operating at voltages from 70 – 265 V AC at 45 – 66 Hz. A soft-
start circuit shall limit current inrush to 8 A. A software configurable
breaker emulation limiter shall safeguard against tripping of AC
mains breakers. The unit shall be cooled by temperature-controlled
fans with air flow from front to rear.
Physical
The unit shall be 483 mm (19 in.) wide, 8
8 mm (3.5 in. /2U) high, and
424 mm (16 in.) deep. Weight shall be 15.8 kg (35 lbs). Finish shall
be black painted steel with grey painted steel front and detachable
grille. The unit shall be approved for use as specified by CE, ETL
(ANSI/UL, CSA), PSE and RCM.
The unit shall be the Lab.gruppen D 120:4L.
D SERIES 120:4L
Architects’ and Engineers’ Specification
D SERIES LAKE: High-Power Installation Platform
The unit shall include four discrete modules of digital loudspeaker
processing. Audio inputs shall be analog with oating ground
isolation, AES3 digital, AES67 and dual redundant Dante
Ethernet-based network. Auto failover switching among inputs shall
be user programmable. Facilities shall be provided for exible input
mixing and routing. DSP capabilities shall include raised cosine
equalization, linear-phase and classical crossovers, and peak and
RMS limiters.
The rear panel shall provide two EtherCon connectors for AES67 and
Dual Redundant Dante Ethernet-based audio and for bi-directional
monitoring and control data with third-party support. Four three-pole
terminal block connectors shall be provided for analog audio inputs
and two three-pole terminal block connectors for AES3 digital inputs.
Output connectors shall be on terminal block connectors with
supplied mating connectors accepting cable up to 16 mm2 (6 AWG).
The front-panel user interface shall provide tri-color indicator LEDs for
FRAME status, TEMPerature and PSU status; and four channel status
indicators (LOAD, AMP, SIGNAL, MUTE). A soft-touch POWER
button shall select ON or STANDBY mode with LED status indication.
A soft-touch SELECT button with LED status indicator shall select
software functionality.