Speaker Management System


  • .3x DSP cluster
  • .64-bit conversion depth
  • .96KHz sampling rate
  • .4 analog inputs plus 1 AES/EBU input, AES/EBU input can be assigned to any input channel through software
  • .Adjustable input channel delay up to 2 seconds with 0.01 millisecond accuracy
  • .Total harmonic distortion > 0.05
  • .Typical dynamics up to 120 dB
  • .The software can connect and operate multiple devices at the same time
  • .The control software version includes Windows 32 and 64-bit formats, and is compatible with Mac M1/M2/M3
  • .The built-in RTA contains three test-specific noise
  • .Each output channel is equipped with a 384 tapsr FIR filter, and can be measured and calculated through the built-in RTA; it can also directly import FIR data packets measured by third-party test software.


The DSP-428II is a four input, eight output Digital Signal Processor (DSP) with additional AES/EBU input and FIR filters intended for use in loudspeaker processor units and system amplifiers for professional audio. Available in four performance levels and using only the best sounding components available, its unrivalled audio quality and feature set match the highest standards.


DSP-428II is UNiKA's new generation speaker processor. It has built-in three new generation DSP clusters. In addition to maintaining the original 64bit conversion depth. The sampling rate has been increased to 96KHz. And each output provides a 384 taps FIR filter. And built-in newly developed RTA and noise generator. Users can connect an external USB test microphone to a computer or connect the test microphone via an external sound card bus or Dante DVS, then perform RTA measurements and record FIR calculation data to correctly correct the filter phase. Of course, you can also import FIR files through other testing software. Such as FIR Designer, REW or RiTA, etc. DSP-428II simplifies the operation panel. Only the MUTE button of the output channel and 6 PRESET call buttons are left. The physical operation process is greatly simplified. Advanced users can make detailed adjustments and settings through the original operating software. And store any 6 of the 100 presets to the device. The new LCD display also simplifies content. Only the networking IP address and the currently used default name and number are retained. There is a 100MHz TCP/IP network socket on the back of the device. It can be directly connected to a computer or integrated into a general LAN switch or router. It is strongly recommended to use a network with a router to connect, and the router will automatically assign an IP.


Analog Inputs (electronically balanced) 4
Dynamic Range typ. 125dB(A)
Max. Input Level +24dBu 
Input Impedance (balanced) 21kΩ 
Input Impedance (single ended) 10.5kΩ 
Digital Inputs 1x AES/EBU
0dB at the LED level indicator 1Vrms
Analog Outputs
Dynamic Range typ. 120dB(A) 
Maximum Output Level +12dBu 
Noise floor at lowest signal level setting < -104dBu(A) 
Source Impedance 235kΩ 
0dB at the LED level indicator 2Vrms 
Input-to-output latency 350μs 
Gain 0 +/-0.5dB 
Dynamic Range (unity gain) > 116dB(A) 
T.H.D. (@0dBV, 1KHz, unity gain, DSP only) <0.005% 
Frequency response 10-40KHz +/-0.5dB 
Number of processors
Sample rate 96KHz 
FIR 8 x 384 taps 
Presets 100 
Delay 2000ms (in) 50ms (out) 
PEQ (each input and output) 10 bands 
Grouping EQ (each input) 5 bands 
Crossover (each input, LPF and HPF) 24 dB/Oct 
Crossover (each output, LPF and HPF) 48 dB/Oct 
Filtered Compressors (each input and output) 4 bands 
Limiter (switchable true RMS / Zero Attack, each in and out) 1 bands 
Power Supply
Universal Power Supply 100-240 VAC, 50/60Hz 
Power Consumption 20W max. 
Fuse 0.5A/250V 
Dimension (W x H x D) ex. Rack Ears 445 x 44.5 x 145 mm 
Nelt Weight 2.0kg 
Shipping Dimension (W x H x D) 553 x 70 x 243 mm 
Shipping weight 2.65kg 
Content of Master Carton  6 pieces