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
• Host interface via RS-232 or QSControl Audio Network System* via CM16a Amplifier Network Monitor
• Electronically balanced inputs
• Contact closure to trigger gain preset changes
• Post-DSP output signal for daisy-chaining
• Peak, RMS and Clip meter displays
• Selectable input sensitivity: 1.5, 4, 9, 13 Vrms; 6, 14.5, 21.5, 24.5 dBu; 3.5, 12, 19, 22.2 dBV
• DataPort "pass-through" compatible with QSControl
• Selectable output sensitivity: 4 Vrms or 6 Vrms

Software

• "Drag-and-drop" configuration software
• DSP processing power and memory dynamically assignable to signal processing functions
• Graphical representation of DSP resources
• Firmware upgrades downloadable via RS-232
• Hard copy printout of configuration layout or parameter settings

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 chain

• 910 msec Maximum
• 20.83 usec 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

Compatible Amplifier Models

The DSP-3 mounts directly to the back of these amplifier models via the DataPort:

• Two-channel CX Series
• Two-channel DCA Series
• PowerLight 2 Series
• ISA Series (Version 2 DataPort--Audio only; requires external power supply)

The following models require a Remote Rack Mounting Bracket (p/n DPX-4, mounts up to 4 modules):

• Full Feature
  • Four-channel CX Series
  • Four-channel DCA Series
  • PowerLight Series
• Reduced Feature Set
  • MX
  • USA
  • PLX
  • RMX
  • Non-QSC amplifiers

Powerful

The DSP-3’s powerful processor allows you to perform a wide range of signal processing functions. Whether you need speaker crossovers, EQ, time delay, or subsonic filters, the DSP-3 is as flexible as your systems's needs.

Each channel includes:

• Crossover filtering
• Multiple parametric EQs
• Shelf filtering
• Tone and noise generation
• Precision attenuation
• Multiple delays (up to 910 ms)
• Mixing
• Compression and limiting

Configurable

The DSP-3’s processing horsepower is dynamically assignable so you’re not locked into a fixed configuration. Simply plug your laptop into its RS-232 serial interface and use QSC's powerful configuration software. You can easily configure multiple processing functions and signal flow with "click-and-drop" simplicity. The DSP-3 also allows real-time control or set-and-forget convenience. You can even save each configuration on disk for future recall.

Versatile

Getting attached to the DSP-3? Then you’ll be glad to know how easily it attaches to most two-channel DataPort-equipped QSC amplifiers, including the CX, DCA, and new PowerLight 2—without taking up extra rack space. Or use multiple DSP-3s with our rack-mount panel kit to create a stand-alone DSP solution that interfaces with any amplifier or system.

• DSP-3 User Guide, Englisch (2314 kB)
• DSP-3 Spec Sheet, Englisch (415 kB)
• DSP-3 Review, English (318 kB)
• DSP 3 CAD File (DXF) (12 kB)
• DSP30, DSP4, DSP3, SC28 Ausschreibungstexte, Englisch

Pro Audio Review 05/2001: Testbericht lesen (PDF, Englisch)

Signal Manager

DSP configuration is made simple with a PC-based "drag-and-drop" software program called Signal Manager. Users can access a DSP "toolbox" and simple drawing tools to configure processing functions and signal flow. DSP processing power and memory is dynamically assignable to signal processing functions and any combination of functions may be configured until the total capacity is used. DSP resources are graphically displayed at the bottom of the screen.

Configurations can be downloaded directly to the DSP-3/DSP-4 via an RS-232 serial port or through a QSControl Audio Network System via CM16a Amplifier Network Monitor for added simplicity. The software package also offers real-time control and set-and-forget convenience. Configurations can be saved and recalled for future use.

QSC's Latest Signal Manager Software Updated 2 May 2002

• Download our newest version of Signal Manager (v.4.75) for your DSP device: Signal Manager v.4.75
• After downloading the file, extract the contents using an unzipping utility like WinZip into a directory on your hard drive.
• Launch the SETUP. EXE file to start the Signal Manager installation process.

Whether you need speaker crossovers, EQ, time delay, or subsonic filters, the DSP-3/DSP-4 is as flexible as your system's needs.

Please refer to the ReadMe file for any late-breaking information about the software. There is also a comprehensive Help section included with Signal Manager. Detailed explanations and examples about everything from hardware to software use are written in an easy-to-understand manner. The following known hardware issues / User Manual addendums, can be downloaded as PDF files (Adobe Acrobat Reader required):

Newer DSP-3s manufactured with serial numbers of 0800xxxxx and greater must use the straight through normal type serial cable. Older DSP-3s manufactured with serial numbers of 0700xxxxx and LOWER must use a “null-modem” type serial cable.

• RS-232 Addendum

CX, DCA, and PL2 amps made prior to August 1999 DO NOT provide adequate power supply voltage to the module, requiring the use of the same type of external DC supply as used with Powerlight amplifiers.

• Power Supply Addendum

Please read the DSP-3 Input/Output Polarity Issue for units manufactured prior to 09/2000.
In response to your requests, expect to receive future releases on a regular basis. Some of the planned features for future releases include:

• a GUI with simplification of modes and presets
• power limiting
• allow preset change via contact closure
• a flash update utility

In the event you need a copy of an earlier version of our DSP software, click one of the links below.
NOTE: All software releases are firmware dependent and may not work with the particular version of firmware in your DSP-3 module! Always refer to the ReadMe file included with each download for further information.