QSC DSP4
Digital Signal Processing Module for QSC Amplifiers

DSP4

With more than three decades of experience pioneering cutting edge audio products, QSC raises the bar once again with the DSP-4 Digital Signal Processing Module. This compact module offers two channels of independent DSP and attaches to the back of most 2-channel DataPort-equipped QSC amplifiers—without occupying any additional rack space.

Capitalizing on the success of our DSP-3, the second-generation DSP-4 provides several enhancements in functionality and performance while also incorporating the universally popular XLR balanced connectors. These enhancements include new A/D and D/A converters for improved signal-to-noise performance and upgraded software that significantly increases the unit’s operational characteristics.

Simple to install, compact, and featuring "set-and-forget" convenience, the DSP-4’s powerful processor enables you to perform a wide range of signal processing functions; and with its new A/D and D/A converters, its noise floor improves. Whether you need speaker crossovers, EQ, time delay, or subsonic filters, the DSP-4 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

The DSP-4’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 power and flexibility of the DSP-4 eliminates the need for expensive outboard processing gear, reducing cost and installation time for almost any application. The compact DSP-4 also plugs directly into the back of most QSC DataPort-equipped amplifiers for use in systems where rack space is a premium.

Hardware Features:

• 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 Features:

• "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)

Specifications:

• Audio Converters: 24 bit, 48 kHz
• Frequency Response: 3 dB below full scale input voltage
• XLR Output: 20 Hz -10 kHz, ± 0.3 dB / 20 Hz - 20 kHz, ± 0.7 dB
• DataPort: 20 Hz - 20 kHz, ± 0.2 dB
• Distortion: < 0.02% THD+N at +4 dBu
• Throughput Delay: 1.00 milliseconds (A/D – DSP – D/A)
• Dynamic Range, AES-17 -60dB Method:
      > 104 dB, 20 Hz to 20 kHz, 1.5V sensitivity, unweighted
      > 106 dB, 20 Hz to 20 kHz, all other sensitivities, unweighted
      > 107 dB, 20 Hz to 20 kHz, 1.5V sensitivity, A weighted
      > 109 dB, 20 Hz to 20 kHz, all other sensitivities, A weighted
• Input Impedance: 8.3k ohm balanced / 3.7k ohm unbalanced
• Common Mode Rejection: > 50 dB minimum, 20 Hz – 20 kHz | > 60 dB typical, 20 Hz – 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
• Crosstalk (inter-channel within DataPort pair): > 62 dB separation, 20 Hz - 20 kHz
• Audio Input Connectors: Two XLR female (1 for each audio channel) | One HD-15 female DataPort* | One RS-232 female (PC input)
• Audio Output Connectors: Two XLR male (for daisy-chaining each audio channel out), One HD-15 male DataPort amplifier connection
• Indicators, Front: Power (one blue) | Signal (one green)
• External Power Requirements: 15 VDC, 0.3 A; Required only for PowerLight®, QSC non-DataPort amplifiers, or non-QSC amplifiers
• Construction: Steel chassis and back cover
• Dimensions (H x W x D): 3.47" x 3.35" x 2.05" (8.81 x 8.51 x 5.21 cm)
• Weight: 0.93 lbs. (0.42 kg)

Our Part #  DSP4