3
Introduction
The DN9824 is speaker processor that provides 2 inputs and 4 outputs, plus internal summing of the
inputsAand B. Via a matrix, it is possible to assign any output to any input or to the sum of the inputs. It
is further possible to establish the following configurations: Stereo or Dual 2-way systems, 3-way +
Direct and 4-way systems, each with Mono Sub-channel, and also full range systems.
Providing 48-bit filter algorithms, 24-bit AD/DA conversion and a dynamic range of 115dB, the
DN9824 sets new standards for digital loudspeaker controllers and processors. The AD section uses 64
times oversampling, gain-ranging Sigma-Delta converters. The DA section uses 128 times
oversampling Sigma-Delta converters. The overall signal processing is performed by two 24-bit
Motorola DSP56007 signal processors.
Each input incorporates a 7-band equalizer, allowing the user to assign high and low-cut, high and low-
shelving or parametric peak-dip filters to each of the individual filter sections. Master delays are
located in each of the input channels, which can be adjusted to affect INA, INB and INA+B.
High-pass and low-pass filters are provided for the frequency crossover functions in all operation
modes. The selection includes Linkwitz-Riley, Butterworth and Bessel type filters with switchable
slopes (slopes are dependant on filter type) between 12, 18 and 24dB/oct. Also available are 6dB/
octave and 12dB/octave peaking filters.
Six additional EQ filters are included in each output channel. Each can be set by the user to function as
high-pass or low-pass, high or low-shelving, parametric peak-dip or all-pass filters. Each channel
additionally provides a delay, a polarity switch, a programmable level control and a digital
compressor/limiter with adjustable threshold, attack and release.
A total number of 70 memory addresses, (50 preset and 20 freely assignable user programs), are
available.
Additional features are:
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FLASH memory for software and preset updates via serial interfaces.
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PC-based operation and configuration software running under Windows '95 / Windows '98
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Standard MIDI-interface
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RS-232 interface
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Back-lit graphic-display with 122 x 32 pixels
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Inputs and outputs are electronically balanced, XLR-type connectors
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Transformer-balancing for the inputs is optionally available
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Input/Output level controls, Output Mute switch, and channel function indicators SUB, LO,
MID and HI
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Input/Output level meters, limiter and clipping LEDs
Within this owner's manual, many of the DN9824's extensive features are explained in detail. For a
complete understanding of its operation, please take the time to carefully read the manual. Keep the
manual stored at a safe place to have it at hand for any further reference.
