I have a very nice condition DSP unit for your subwoofers. List is over $700. Will sell for $300. I have the original box.
http://www.qscaudio.com/products/dsp/dsp30/dsp30.htmFeaturing intuitive PC system configuration combined with "set-and-forget" convenience, the DSP-30 unites easy-to-use, customizable, two-channel digital signal processing (DSP) with a simple preset selection interface that requires only two buttons. It can be used with all amplifiers and is housed in a 1RU, 19-inch rack-mount steel chassis. Sampling frequency is 48 kHz with 24-bit resolution. Dynamic range is greater than 95 dB. Rugged and dependable in the spirit of all QSC professional audio products, the DSP-30 is well suited to a variety of applications including mobile DJ, club PA, and pro touring.
Powerful
The DSP-30's powerful processor enables a wide range of signal processing functions. Whether you need speaker crossovers, EQ, time delay, or subsonic filters, the DSP-30 is as flexible as your system'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-30's processing horsepower is dynamically assignable, so you are not limited by a fixed signal chain. Simply use QSC's powerful PC-based Signal Manager software to easily configure multiple processing functions and signal flow with "drag-and-drop" tools. The DSP-30 provides eight fully configurable user presets, selectable from front-panel switches.
Cost-effective
The power and flexibility of the DSP-30 eliminates the need for individual outboard signal processors—reducing cost, space, and installation time for almost any application. Housed in a 1RU, 19-inch rack-mount steel chassis, it can be used with all audio systems.
DOCUMENTS
DSP-30 Users Manual (PDF 1MB)
DSP-30 Specifications (PDF 284K)
HI-RES IMAGES
DSP-30
RESOURCES
DSP Voicings
SOFTWARE
SIGNAL MANAGER SOFTWARE
DSP-30 FEATURES
Hardware
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
Easy PC connection with front panel RS-232
Balanced Neutrik® Combo (XLR and 1/4") inputs and XLR outputs
Power and signal present LEDs with signal level
Numeric display indicates current preset
Eight fully configurable user presets
Preset Browse and Accept buttons with lock-out feature
Selectable input sensitivity: 1.5, 4, 9, 18 Vrms; 6, 14.5, 21.5, 27.5 dBu; 3.5, 12, 19, 25 dBV
Software
"Drag-and-drop" configuration software
Hard copy printout of configuration layout or parameter settings
DSP processing power and memory dynamically assignable to signal processing functions— eliminating the limitations imposed by fixed signal chain designs
Graphical representation of DSP resources
Firmware upgrades via RS-232
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DSP-30 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 chain
910 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
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DSP-30 SPECIFICATIONS
Audio Converters 24 BIT, 48 kHz
Frequency Response 20 Hz to 20 kHz ± 0.4 dB
at 1 dB below full scale input voltage (all sensitivities)
Distortion <0.007% THD+N at 1 dB below full scale output
(all sensitivities) 20 Hz to 20 kHz
Throughput Delay 1.00 milliseconds (A/D –› DSP –› D/A)
Dynamic Range >95 dB unweighted, 1.5V, 4V and 9V input sensitivities
AES-17 -60 dB Method >93 dB unweighted, 18V input sensitivities
Input Sensitivity
(Full scale sine wave RMS before clipping. Full scale output voltage 9.3 Vrms.) 1.5, 4, 9, 18 Vrms
6, 14.5, 21.5, 27.5 dBu
3.5, 12.0, 19.0, 25.0 dBV
Polarity In-phase or inverted
Mute >95 dB attenuation
Inputs
Program inputs
Connector
Type
Grounding
Input sensitivity (full scale input level)
Impedance
Common-mode rejection
Crosstalk
2
Balanced Neutrik Combo
Electronically balanced
All shield terminals connected to chassis
Level and units are selectable in software interface
8.3 K Ohm balanced, 3.7 K Ohm unbalanced
>54 dB, 20 Hz-20 kHz
>80 dB separation, 20 Hz-20kHz
Outputs
Program outputs
Connector
Type
Grounding
Output level
Maximum output (full scale)
Output pad
Output impedance
2
3-pin male XLR receptacle
Electronically balanced
All shield terminals connected to chassis
Level and units are selectable in software interface
9.3 Vrms (+21.5 dBu), THD <1.0%
-6 dB
600 Ohms balanced
RS-232 Port
Port type
Cable type
Maximum length
RS-232, female, straight through
9-pin serial cable, male-to-female (serial extension cable)
25 feet (7.6 meters)
Contact Closure Input
Inputs
Configuration
Resistance for closure detect
Resistance for open detect
TTL compatible thresholds with9V DC max input
1 discrete input (pin #9 of RS-232 port)
Single-ended input, pull LOW (to GND, pin5) for closure detect
<150 Ohms
>1.9 K Ohms
Power Amplifier Interface, Compatibility Works with all professional audio power products
Indicators Power: 1 blue LED
Channel 1 and Channel 2 signal level: 2 green LED’s, Active Preset, Number and Lock
Chassis Type Steel (chassis and covers)
Dimensions 1.73" (4.4 cm) height
18.9" (48.0 cm) width (including rack ears)
14.9" (37.5 cm) depth (including rack ears)
13.7" (34.8 cm) depth (excluding rack ears)
Weight 9.5 lbs. (3.4 kg) net
12.5 lbs. (4.1 kg) shipping
Mounting May be rack mounted or may be used separate from rack
Operating temperature range 32° to 122° F (0° to 50° C)
Internal Power Supply
AC Input Voltage
AC Input Current
Frequency
Power Cord
Autodetect 100-240 VAC
0.3 Amps rms
50 to 60 Hz
IEC-type detachable 6 ft. cord
