Dynacord DSP 244

• Manufacturer: Dynacord
• Model: DSP 244
• Category: Digital PA Controllers
• Added in our database on: 10/20/2002

DESCRIPTION
Providing 48-bit filter algorithms, 24-bit AD/DA conversion and a dyna-
mic range of 115 dB, the DSP 244 sets new standards for digital
loudspeaker controllers and processors. The DSP 244 is an universal
Digital Sound System Processor that provides 2 inputs and 4 outputs;
plus internal summing of the inputs 1 and 2. Via matrix it is possible to
assign the outputs 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, but also full range systems.
High 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 between 6,
12, 18 and 24 dB/oct. A huge number of additional filters offers
extremely flexible correction of the frequency response. Each input
incorporates a 5-band equalizer, allowing to assign high and low-pass,
high and low-shelving or parametric peak-dip filters to its individual filter
sections. Next to the frequency crossover filters, four additional filters
are employed in each output channel, which also can be set to work as
high or low-pass, high or low-shelving filters, parametric peak-dip filters,
or all-pass filters. Additional filtering is provided through 2. order
high-passes for the realization of B-6 alignment, or special LPN-filters
(Low-Pass Notch filters) for correcting the frequency and phase respon-
ses of optimally vented woofer cabinets. Each channel additionally
provides a delay, a polarity switch, a programmable level control and
a digital compressor / limiter while the master delays are located in the
input channels.
The user can choose between three operation modes: the “No Edit
Mode” allows to simply select the required combination of loudspeaker
systems from the factory preset program list. Afterwards, the appliance
is optimally matched to the sound system and can be operated
instantly. The “Standard Edit Mode” also uses a pre-set basic program
but with the exception that here, the user has access to the selected
amount of parameters. The “Full Edit Mode” on the other hand offers
access to all parameters, allowing to freely program and store basically
any setting. A total number of 80 memory addresses - 50 preset and
30 freely assignable user-programs - are available.
Within the DSP 244, AD/DA conversion is taken care of by linear 24-bit
converters; where the AD-section employs 128 times oversampling,gain-ranging Sigma-Delta converters. The DA-section offers 128 times
oversampling Sigma-Delta converters. The overall signal processing is
performed by two 24-bit Motorola signal processors.
Additional features are:
- FLASH memory for software and preset updates via serial
interfaces
- PC-based operation and configuration software running under
Windows ‘95 / Windows ‘98
- Standard MIDI-interface
- RS-232, RS-485 interfaces or switching contacts optionally
available
- Back-lit graphic-display with 122 x 32 dots
- Inputs and outputs are electronically balanced, XLR-type
connectors
- Input transformer-balancing is optionally available
- Input / Output level controls, Output-Mute switch, channel
function indicators SUB, LO, MID, HI
- Input / Output meter instruments, compressor and clipping LEDs

TECHNICAL SPECIFICATIONS
Mains voltage
Power consumption
Safety class 90 - 250 V AC / 50 - 60 Hz
20 watts
I
Inputs 2 x XLR IN, electronically balanced,
transformer optional available
2 x XLR OUT (Direct Out)
1.55 V / + 6 dBu
24.5 V / + 30 dBu
20 kohms
> 40 dB
24-bit, Sigma-Delta, 128 times
oversampling, linear phase
Input voltage (nominal)
Max. input voltage
Input impedance
Common mode rejection
AD-conversion
Outputs
Output voltage (nominal)
Max. output voltage
Output impedance
Min. load impedance
DA-conversion 4 x XLR OUT, electronically balanced
1.55 V / + 6 dBu
8.7 V / + 21 dBu
< 100 ohms
600 ohms
24-bit, Sigma-Delta, 128 times
oversampling
Frequency response
S/N ratio
Distortion without transformer
Distortion with transformer 20 Hz - 20 kHz (- 0.5 dB)
115 dB (typical)
< 0.01 %
< 0.05 %
Frequency crossovers 6, 12, 18, 24 dB/oct. slope;
Butterworth, Bessel, Linkwitz-Riley
26 parametric equalizers
Low-Shelving equalizer,
LPN (Lowpass-Notch) switchable
Hi-Shelving equalizer, 6 / 12 dB slope
switchable, Lo-Cut filter (B-6 alignment
switchable), Hi-Cut filter, All-Pass filter
4 digital compressors / limiters
3 master delays (2 ms - 900 ms)
4 channel delays (0 ms - 900 ms)
delay-increment 21 µsec.
Filters
Compressor / limiter
Delay
Data format
Sampling rate
MIDI IN / OUT / THRU
Display
Dimensions
Weight
Locking function
Accessories
Options
24-bit linear AD / DA conversion,
48-bit processing
48 kHz
Data Dump, Master / Slave operation/
Remote Control
122 x 32 Dots, graphic LC-Display with
LED-background lighting
483 x 43.6 x 374 (WxHxD in mm), 19", 1 HU
5 kg / 11 lbs
protection against inadvertent operation
via function-lock
PA 1 plexiglas cover 1 HU
NRS 90244
Input transformer
NRS 90243
RS-232 interface
NRS 90247
RS-485 interface
NRS 90246
Contact Closure interface