| Feed the day’s weather report into the Meyer Sound
LD-3 through its Temperature, Altitude and Relative Humidity knobs, dial-in
the type of loudspeakers and distance of the throw for each section of
the array, and the Meyer Sound LD-3 goes to work. A RISC microcontroller
retrieves response correction coefficients and corrects the output to
compensate for the weather.
By utilizing multiple-variable atmospheric loss equations and pre-calculated
MAPP Online stored values, the Meyer Sound LD-3 delivers results quickly
and efficiently. Its high-quality, digitally-controlled analog filters
provide the best of both worlds: the low latency and wide dynamic range
of analog and the nimble, precise, repeatable results of digital. The
Meyer Sound LD-3 corrects frequency response up to 16 kHz at a resolution
down to 1 dB.
In addition to weather correction, the Meyer Sound LD-3’s unique
ability to compensate for low to mid-low frequency build-up allows you
to fine-tune each channel driving an M Series array. Set the type of loudspeaker
you’re using and the number of cabinets in the array, and the Meyer
Sound LD-3's stored presets do the rest for you.
Each of the Meyer Sound LD-3’s two channels consists of a master
input section, a dedicated subwoofer output, and three outputs to control
the array. Three sends and four returns provide the control you need,
via insert switches, to route the signal and incorporate additional signal
processing, such as parametric equalization.
The master input section provides individual channel gain adjustment
from –12 to +6 dB, mute, signal/clip/mute indicators, and a switchable
high-pass filter (0, 80, or 160 Hz) for boundary correction or optimizing
crossover to subwoofers. Master environmental controls include temperature
(0° to 45° C), altitude (switchable in three ranges: 0-800, 800-2200,
and 2200+ m) and relative humidity (10 to 100%).
Individual outputs provide gain trim from -6 to +6 dB (-6 to -3 and +3
to +6 settings not recommended to preserve array behavior), signal/clip/mute
indicators, send/return insert switches, and distance controls to define
the throw from each sound system branch to its audience coverage area
up to 150 meters (492 feet).
The Meyer Sound LD-3’s dedicated subwoofer control sections feature
polarity switches, gain trim from –6 to +6 dB, mute, signal/clip/mute
indicators, and send/return insert switches.
In addition to its sophisticated environmental and array control functions,
the Meyer Sound LD-3 integrates different types of Meyer Sound self-powered
speakers into a full-range main system, while maintaining signal integrity
for long cable paths.
The Meyer Sound LD-3 occupies two standard 19-inch relay rack spaces.
Flash memory for future expansion is built in, and all input and outputs
are electronically balanced and utilize XLR (A-3) type connectors. The
AC inlet is an IEC standard male connector, protected with a 250 mA 250
V fuse, and switchable in the ranges of 105 to 125 V AC and 210 to 250
V AC.
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