DSP-4 FEATURES

 

Hardware
  • Two independent channels of DSP
  • 48kHz, 24-bit converters
  • No turn on pops or zipper noise
  • If the memory or hardware fails, unit turns on muted to prevent driver damage
  • Host interface via RS-232 or QSControl Audio Network System via CM16a Amplifier Network Monitor
  • Electronically balanced XLR inputs
  • Contact closure to trigger preset changes
  • Post-DSP output signal for daisy-chaining
  • Peak and RMS meter displays with clip indication
  • DataPort pass-through compatible with QSControl
  • Selectable input sensitivity: 1.5, 4, 9, 18 Vrms;
    6, 14.5, 21.5, 27.5 dBu; 3.5, 12, 19, 25 dBV
  • Output signal gain (to be released)

 

Software
  • "Drag-and-drop" configuration software
  • DSP processing power and memory is dynamically assigned to signal processing functions - eliminating the limitations imposed by fixed signal chain designs
  • Graphical representation of DSP resources
  • Firmware upgrades via RS-232
  • Hard copy printout of signal flow layout or parameter settings
System Requirements
  • Windows® 98, NT4 (SP6), and 2000 (SP1)*
  • SVGA monitor @ 800 x 600 (min.); 1024 x 768 recommended
  • CD-ROM drive
  • 32 MB RAM (min.)
  • 10 MB free hard disk space (min.)
  • Available RS-232 COM port
  • Male-to-female 9-pin serial cable (for programming)

    * Windows ME not supported



 

  DSP-4 FUNCTIONS
Multiple Parametric Filters, assignable anywhere in the signal chain:Variable Frequency
Variable Gain
Variable Q
Bypass (one EQ Band)
Bypass all EQs
Add EQ
Delete EQ
Show Response
Multiple Delays, assignable anywhere in the signal chain910 msec Maximum
20.83 μsec Incremental
Dynamics processor with Compressor assignable anywhere in the signal chain: Gain
Threshold
Ratio
Attack Time
Release Time
Show Response
Bypass
Output Peak Limiter, assignable anywhere in the signal chain:Gain
Threshold
Attack Time
Release Time
Show Response
Bypass
High and Low-Pass Crossover Filters, assignable anywhere in the signal chain:Butterworth 6, 12, 18, 24 dB per octave slope
Bessel 6, 12, 18, 24 dB per octave slope
Linkwitz-Riley 12 and 24 dB per octave slope
Bypass (one EQ Band)
Bypass all EQs
Add EQ
Delete EQ
Show Response
High and Low-Pass Shelf Filters, assignable anywhere in the signal chain:
Variable Corner Frequency
Variable Gain
Variable Q
Bypass (one EQ Band)
Bypass all EQs
Add EQ
Delete EQ
Show Response
Signal Mute
Attenuation: 0.1 dB steps
Mix Audio (2 to 1 Mixer)
Signal Splitter
Built-in Noise Generator (Pink & White)
Built-in Variable Frequency Tone Generator
Signal Polarity Reversal
RMS and Peak Metering with Clip Indication
Add or delete up to 7 additional bands of "EQ" per filter block
Visual editing of composite filter response, using cursor controls in graphical display
Individual or group bypass of EQ bands per filter block
"Predictive Delay" feature- produces less signal distortion than analog compressor/limiters-especially for fast attack times



DSP-4 SPECIFICATIONS
Frequency Response
XLR Output
3 dB below full scale input voltage		20 Hz to 10 kHz ± 0.3 dB
20 Hz to 20 kHz ± 0.7 dB
Distortion 
Dynamic Range Unweighted>104 dB 20 Hz to 20 kHz, 1.5V sensitivity, unweighted
>106 dB 20 Hz to 20 kHz, all other sensitivies, unweighted
>106 dB 20 Hz to 20 kHz, 1.5V sensitivity, A weighted
>108 dB 20 Hz to 20 kHz, all other sensitivies, A weighted
Common-mode Rejection>50 dB minimum 20 Hz to 20 kHz
>60 dB typical 20 Hz to 20 kHz
Input Sensitivity (selectable)1.5, 4, 9, 18 Vrms
6, 14.5, 21.5, 27.5 dBu
3.5, 12, 19, 25 dBV
Output Sensitivity4, 6 Vrms
14.5, 18 dBu
12, 15.5 dBV
Crosstalk (inter-channel w/in DataPort pair)>62 dB separation, 20 Hz to 20 kHz
Input ConnectorsTwo XLR female (1 for each audio channel)
One HD-15 female DataPort*
One RS-232 female (PC input)
One Power Jack (Required only for PowerLight, QSC non-DataPort amplifiers, or non-QSC amplifiers, using remote rack mounting bracket)
Output ConnectorsTwo XLR male (for daisy-chaining each audio channel out)
One HD-15, male amplifier connection
IndicatorsFront: Power (one blue) Signal (one green)
External Power Requirements
(DPX-1 recommended)		15 VDC, 0.4 A
Required only for PowerLight, QSC non-DataPort amplifiers, V2 DataPort (audio only) models, or non-QSC amplifiers.
Dimensions3.5" height
3.75" width
1.38" depth
Weight.93 lbs net, 1 lb shipping
ConstructionSteel chassis and back cover
*DataPort input for use with CM16a Amplifier Network Monitor in QSControl audio network systems for remote management of QSC amplifiers and other audio devices.




 

  Compatible Amplifier Models

The DSP-4 mounts directly to the back of these models via the DataPort:

Full Feature:

  • Two-channel CX Series
  • Two-channel DCA Series
  • PowerLight 2 Series
  • ISA Series (Version 2 DataPort--audio only; requires external power supply)37
The following models require a Remote Rack Mounting Bracket: 
(Download the DPX-4 specs in PDF format here.)

Full Feature (DPX-2 cable required)
  • Four-channel CX Series
  • Four-channel DCA Series
  • PowerLight Series
Reduced Feature Set
  • MX
  • USA
  • PLX
  • RMX
  • Non-QSC amplifiers