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LD Systems DS21 - 19" DSP Controller 3-Channel The LD Systems DS21 is a premium 3-channel DSP controller designed for 2.1 loudspeaker systems, delivering 24-bit processing and intuitive front panel operation for easy setup and superior audio performance. Key Features Universal 3-channel DSP controller for 2.1 loudspeaker systems 24-bit AD/DA conversion with 48 kHz sampling frequency 3-band parametric EQ with adjustable Q and selectable high/low shelf filters Advanced crossover filters: Butterworth, Bessel, and Linkwitz-Riley with slopes from 6 dB to 24 dB per octave Adjustable delay up to 12.5 ms on all three outputs Independent limiter settings for left, right, and subwoofer channels Backlit 2 x 16 LCD display with jog wheel for quick parameter adjustments and preset recall Real-time level meter for monitoring output levels Rack-mountable 19" design suitable for live sound and fixed installations Rear panel XLR inputs and balanced XLR outputs, plus USB interface for software control Specifications Product type: DSP controller Type: Digital, 3-channel AD/DA converter: 24-bit Sampling frequency: 48 kHz Frequency response: 20 Hz - 20,000 Hz Filter types: Butterworth, Linkwitz-Riley, Bessel Filter slopes: 6 dB/oct, 12 dB/oct, 18 dB/oct, 24 dB/oct Dynamic range: > 100 dB Signal-to-noise ratio: 87 dB THD: 0.005% Crosstalk: > 80 dB Max. input level: +13 dBu Max. output level: +13 dBu Input impedance: 22 kOhm Output impedance: 300 Ohm(s) Controls: Edit, Power, Parameter, Recall Indicators: Multifunction LCD display Line inputs: 2 (XLR) Line outputs: 3 (balanced XLR) Interfaces: USB Mains connector: IEC socket Operating voltage: 90 V AC - 250 V AC, 50 - 60 Hz Dimensions (W x H x D): 482 mm x 44.5 mm x 160 mm Weight: 1.8 kg What's in the Box LD Systems DS21 DSP Controller Power cord Software for device control