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Digital Signal Processor
Save space and weight by plugging the DSP-3
into the back of most DataPort equipped QSC
amplifiers. Or use multiple DSP-3s as a stand
alone, rack mountable DSP solution.
The DSP-3’s two channels of independent signal processing deliver
more power, flexibility, and features—in short, more of everything
The DSP-3’s processing horsepower is dynamically assignable so you
you really need in a DSP—for less. Simple to install and compact, the
are not limited by a fixed signal chain. Simply use QSC’s powerful PC
DSP-3 is the advanced and affordable digital signal processing solution
based Signal Manager software to easily configure multiple processing
for your audio system.
functions and signal flow with “drag-and-drop” tools.
The DSP-3’s powerful processor allows you to perform a wide range
The power and flexibility of the DSP-3 eliminates the need for expensive
of signal processing functions. Whether you need speaker crossovers,
outboard processing gear, reducing cost and installation time for almost
EQ, signal delay, or infrasonic filters, the DSP-3 is as flexible as your
any application. The compact DSP-3 also plugs directly to the back of
system’s needs.
most QSC DataPort equipped amplifiers for use in systems where rack
space is a premium.
Each channel includes:
• Crossover filtering
• Shelf filtering
• Compression and limiting
• Mixing
• Multiple Parametric EQs
• Multiple Delays (up to 910 ms)
• Precision attenuation
• Tone and noise generation
Signal Processing Functions and Additional Features
Multiple Parametric Filters, assignable anywhere in the signal chain:
Variable Frequency
Bypass all EQs
Variable Gain
Add EQ
Variable Q
Delete EQ
Bypass one EQ
Show Response
Multiple Delays, assignable anywhere in the signal chain:
20.83 µsec incremental
910 msec maximum (total of all delays)
Compressor, assignable anywhere in the signal chain:
Release Time
Show Response
Attack Time
Output Peak Limiter, assignable anywhere in the signal chain:
Release Time
Show Response
Attack Time
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
Delete EQ
Bypass all EQ’s
Show Response
Add EQ
Cutoff Frequency
High and Low-Pass Shelf Filters, assignable anywhere in the
signal chain:
Variable Corner Frequency
Bypass all EQs
Variable Gain
Add EQ
Variable Q
Delete EQ
Bypass one EQ
Show Response
Signal Mute
Attenuation 0.1 dB steps
Mix Post Crossover Audio (2➞1 Mixer)
Signal Splitter
Built-in Noise Generator (Pink & White)
Built-in Variable Frequency Tone Generator
Signal Polarity Reversal
Frequency Response
Clip and Protect Indication of the amplifier’s output
Predictive Delay Feature — produces less signal distortion than analog
compressor/limiters — especially for fast attack times
Two independent channels of DSP
48 kHz, 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 inputs
Contact closure to trigger preset changes
Post DSP output signal for daisy chaining
Selectable input sensitivity: 1.5, 4, 9, 13 Vrms; 6, 14.5, 21.5, 24.5 dBu;
3.5, 12, 19, 22.2 dBV
“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 at 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
The DSP is configured with an
easy-to-use software interface.
Signal processing icons from the
toolbar are dropped onto the
workspace and the signal path is
routed with simple drawing tools.
Signal Manager
Advanced “Drag and Drop” Software Configuration
DSP configuration is made simple with a PC-based “dragand-drop” software program called Signal Manager. Users
can access a DSP “toolbox” and simple drawing tools
to configure processing functions and signal flow.
Compatible Amplifier Models
processing power and memory is dynamically assigned
The DSP-3 mounts directly to the back of these models via the DataPort:
to signal processing functions and any combination of
Full Feature
Version 2 DataPort
functions may be configured until the total capacity is used.
• Two-channel CX Series
DSP resources are graphically displayed at the bottom of
• Two-channel DCA Series • ISA (V2 DataPort – audio only;
requires external power supply)
the screen.
•PowerLight 2 Series
Configurations can be downloaded directly to the DSP-3
The following models require a Remote Rack Mounting Bracket:
via an RS-232 serial port or through a QSControl Audio
Full Feature (DPX-2 cable required)
Reduced Feature Set
Network System via a CM16a Amplifier Network Monitor for
• 4-channel CX Series
• MX
added simplicity. The software package also offers real-time
• 4-channel DCA Series
control and set-and-forget convenience. Configurations can
• PowerLight Series
be saved and recalled for future use.
• 8-channel CX Series
• Non-QSC amplifiers
Audio Converters
24 bit, 48 kHz
Frequency Response
Euro Input
20 Hz -10 kHz, ± 0.3 dB / 20 Hz - 20 kHz, ± 0.7 dB
20 Hz - 20 kHz, ± 0.2 dB
< 0.01% THD+N at +4 dBu
Throughput Delay
1.00 milliseconds (A/D – DSP – D/A)
Dynamic Range Unweighted
> 93 dB, 20 Hz to 20 kHz for 1.5, 4, 9V input sensitivities
> 88 dB, 20 Hz to 20 kHz for 13V input sensitivities
AES-17 -60 dB Method Input Impedance
8.3k ohm balanced / 3.7k ohm unbalanced
Commom Mode Rejection
> 50 dB, 20 Hz – 20 kHz typical | > 40 dB and 20 kHz worst case
Input Sensitivity (selectable)
1.5, 4, 9, 13 Vrms | 6, 14.5, 21.5, 24.5 dBu | 3.5, 12, 19, 22.2 dBV
Crosstalk (inter-channel within DataPort pair)
> 72 dB separation, 20 Hz - 20 kHz
Audio Input Connectors
Two 3-pin Euros (1 for each audio channel) / One HD-15 female DataPort* / One RS-232 female (PC input)
Audio Output Connectors Two 3-pin Euros (for daisy-chaining each audio channel out)
One HD-15 male DataPort amplifier connection
Front: Power (one blue) | Signal (one green)
Contact Closure Inout
Inputs 1 discrete input (pin #9 of RS-232 port)
Configuration Single-ended input, pull LOW (to GND, pin5) for closure detect
Resistance for closure detect < 150Ω
Resistance for open detect TTL compatible
thresholds with 9V DC max input
> 1.9k ohms
External Power Requirements
(DPX-1 recommended)
15 VDC, 0.3 A
Required only for PowerLight®, QSC non-DataPort amplifiers, or non-QSC amplifiers, using remote rack mounting bracket
DImensions (HWD)
3.47" (8.81 cm) x 3.37" (8.56 cm) without flanges / 3.75" (9.52 cm) with flanges x 1.37" (3.48 cm)
Weight - Net / Shipping
0.6 lbs (0.27 kg) / 1 lb (0.45 kg) Construction
Steel 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
PowerLight is a registered trademart of QSC Audio Products Inc.
A remote rack mounting bracket (the DXP-4) is available to use with PowerLight, 4-channel QSC amplifiers, or for non
DataPort equipped amplifiers. Designed to be bolted to the rear of an amplifier rack, up to four modules can be mounted
to each panel, providing up to eight channels of DSP processing in a three rack unit space.
1675 MacArthur Boulevard • Costa Mesa, CA 92626 • Ph: 800/854-4079 or 714/957-7100 • Fax: 714/754-6174
DSP-3 Spec Sheet - 02/21/06
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