QSC DSP4 2 Channel digital signal processor with XLR in/out connectors

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2 Channel digital signal processor with XLR input/output connectors, small form factor.


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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

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