A & E Specifications
Architects’ and Engineers’ Specification
PLM
™
Series: Powered Loudspeaker Management
™
PLM 14000
WWW.LA BGRUPPE N.COM
Item no. AES-PLM14000 - 02.12.2015
Overview and Functions
The unit shall comprise a dual module digital loudspeaker drive
processor fully integrated with a two-channel power amplier. Ad-
ditional capabilities and facilities shall include load verication and
real-time performance monitoring; low-latency, Ethernet-based au-
dio networking; control and monitoring of internal parameters from
a remote computer; and optional software integration of industry-
standard acoustical measurement tools. All control, monitoring and
measurement facilities shall be remotely accessible via a custom PC
software interface supplied with the unit.
Digital Loudspeaker Processing
The unit shall include two modules of comprehensive digital audio
processing congured specically for loudspeaker drive applications.
Facilities shall be included for raised cosine equalization, linear-phase
and classical crossovers, peak and rms limiters, and oating ground
isolation. The processor rmware, in conjunction with supplied PC
software, shall accommodate exible mixing and routing, including
software-driven linkage of processing modules in two or more sepa-
rate units to function as a single module with extended capabilities.
Power Amplifier
Maximum total peak output of both channels shall be 14,000 watts.
In discrete two-channel mode, each amplier channel shall deliver
maximum continuous power as follows: 1150 watts into 16 ohms,
2300 watts into 8 ohms; 4300 watts into 4 ohms; or 7000 watts
into 2 ohms. When one channel is driven at -3 dB, maximum con-
tinuous output power for the other channel shall be 4400 watts at 4
ohms and 7500 watts at 2 ohms, with output at other impedances
as above. Maximum output voltage per channel shall be 193 V; maxi-
mum output current per channel shall be 90 A peak. Amplier gain
shall be adjustable in the DSP input module across a range of 22 to
44 dB in 0.1 dB increments.
The unit shall exhibit the following performance parameters: Fre-
quency response shall be 20 Hz to 20 kHz, +/-0.05 dB at 1 watt into 8
ohms. Dynamic range with digital inputs (all supported sample rates)
shall be greater than 114 dBA. Propagation delay (analog input) shall
not exceed 1.68 ms. The unit shall include a DSP-implemented zero
overshoot voltage peak limiter individually adjustable per channel for
maximum voltage between 17.8 and 193 V in 0.1 V increments.
Load Verification and Circuit Protection
The unit’s DSP and on-board rmware, in conjunction with supplied
PC control software and loudspeaker database, shall enable the unit
to verify that loudspeaker loads are connected as intended, and to
identify defective drivers or faulty wiring. The DSP and associated
software also shall allow real-time monitoring of critical performance
parameters for both the power amplier section and connected loud-
speakers. Circuits and sensors shall be provided for warning and pro-
tection against VHF (very high frequencies), DC at output, over-tem-
perature, open load, excessive current, and voltage peak clipping.
Connectors, Network, and User Interfaces
The rear panel shall provide audio inputs for analog (2) and AES digital
(1) audio signals on XLR-F connectors, with link outputs for all three
inputs on adjacent XLR-M connectors. In addition, two EtherCon
®
-
housed RJ45 Ethernet jacks shall be provided for networked digital
audio as well as monitoring and control via remote PC. The unit shall
be compatible with use as part of a low-latency, self-conguring digi-
tal audio network that supports sampling frequencies from 44.1 to
192 kHz. Output connectors on the unit shall be either binding post
or Neutrik® Speakon® (2 x NLT4).
The front panel user interface shall include a high-brightness 2.5-
inch LCD panel, a moisture-resistant silicone touch pad, and a rotary
encoder. The user interface shall be menu-driven, with screen dis-
plays and soft-keys accessing functions of the digital loudspeaker
processor and the power amplier. Dedicated keys shall be provided
for Mute Enable, Meter and Menu functions. Multi-color LEDs shall
indicate presence of any warning or fault conditions.
The unit shall be supplied with a custom software program for com-
prehensive monitoring of system status and operating parameters, as
well as control of DSP and amplier functions. The software program
shall be compatible with use on a Tablet PC, and shall offer plug-in
integration of industry standard audio and acoustical measurement
tools in the same user interface. A third-party control protocol shall
make status and control data available for integration of PLM units
with third-party AV control systems.
Power Supply, Protection, and Cooling
The power supply shall be a regulated switch mode type. The ampli-
er shall operate from AC line sources of either 230 V nominal or 115
V nominal (not user selectable), with respective operating ranges of
140 – 265 V and 70 – 135 V at line frequencies of 50 Hz or 60 Hz.
A soft start circuit shall limit current inrush at powerup to 5 A. The
amplier shall be equipped with an averaging power limiter circuit
to prevent excessive current draw. The amplier shall be cooled by
two temperature-controlled, variable-speed fans, with air ow from
front to back. An adaptive fan on/off function shall be dependent on
presence of an output signal.
Physical
The unit shall be 483 mm (19 in.) wide, 88 mm (3.5 in / 2 U) high,
and 470 mm (18.5 in.) deep including handles and rear support. The
weight shall be 13.5 kg (29.7 lbs). The chassis housing shall be black
painted steel with a black painted steel and aluminum front surround
and handles.
The unit shall be approved for use as specied by CE, ANSI/UL, ETL
and the FCC. The unit shall be the Lab.gruppen PLM 14000.