A & E Specifications Version 1

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Item no. AES-DSERIES10:4L_V1 - 24.05.2016
Overview
The unit shall incorporate two core elements: a four-in/four-out
digital loudspeaker drive processor and a four-channel, high-output
power amplier 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 conguration
and control using a PC software interface supplied with the unit. The
included integrated software package also shall include a custom
amplier conguration interface and additional features to expedite
system design, specication and commissioning.
Digital Loudspeaker Processing
The unit shall include four discrete modules of digital loudspeaker
processing. Audio inputs shall be analog with oating ground
isolation, AES3 digital, and dual redundant 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.
Power Amplifier
Maximum total power output shall be 1000 W or 250 W per channel
nominal @ 4 ohms. Maximum output into a 100 V high-impedance
distributed system shall be 175 W. The amplier topology shall
allow exibility in output power management, with the capability to
allocate total available power across output channels as needed for
the application. Any channel shall be capable of being signicantly
scaled up in order to distribute the output power. Maximum peak
output voltage shall be 142 V and maximum output current shall be
30 A. The amplier shall incorporate power factor correction (PFC)
to reduce requirements on the mains distribution system. Amplier
gain shall be digitally congurable 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 >112 dB. Propagation delay shall not exceed 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 prole.
Load Verification and Circuit Protection
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
The rear panel shall provide two EtherCon connectors for third-party
Ethernet-based audio networking and for bi-directional monitoring
and control data. 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 8 mm
2
(8.2 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.
Power Supply, Protection and Cooling
The power supply shall be a universal regulated, switch-mode type
operating at voltages from 70 – 265 V AC at 45 – 66 Hz. A softstart
circuit shall limit current inrush to 8 A. The unit shall be cooled by
temperature-controlled fans with air ow from front to rear.
Physical
The unit shall be 483 mm (19 in.) wide, 44 mm (1.75 in. /1U) high, and
424 mm (16 in.) deep. Weight shall be 7.8 kg (17.2 lbs). Finish shall
be black painted steel with grey painted steel front and detachable
grille. The unit shall be approved for use as specied by CE, ETL
(ANSI/UL, CSA), PSE and RCM, NIS, CCC.
The unit shall be the Lab.gruppen D 10:4L.
D SERIES 10:4L
Architects’ and Engineers’ Specification
D SERIES LAKE: High-Performance Installation Platform