• LP428
  • LP428

lp428LP428 user’s manual

LP428 Loudspeaker Processor

German chip, Multilingual, Password protection

Software download

iwac220 Windows system(32 bit)

iwac220 Windows system(64 bit)

iwac220 MAC OS system


●  96kHz sampling rate with 24bit depth.
●  64 bit digital signal processing.
●  110dB dynamic range on inputs.
●  114dB dynamic range on outputs.
●  Nominal input level at 0dBu.
●  Maximum input level at 23dBu.
●  Nominal output level at 0dBu.
●  Maximum output level at 12dBu.
●  Frequency range from 10Hz to 40kHz.
●  Processing latency below 1ms.
●  16 character LCD display.
●  100 presets memory on hardware unit.
●  220v / 110v AC mains selector.


Model LP428
Inputs Four ways Balanced inputs
Outputs Eight ways unbalanced outputs
Input impedance ≥ 10kΩ
Outputs impedance ≤ 60Ω
Output gain From +12dB to -50dB, 0.25dB increment
Input gain From +12dB to -50dB, 0.25dB increment
Other specifications
Frequency response(-0.3dB) 20Hz – 20kHz
THD+N ≤ 0.05%
Max delay 5ms
Dynamic range ≥80dB
Converts Frequency (high pass/ low pass) 20Hz – 20kHz, 1Hz increment
Centre Frequency (high pass/ low pass) 20Hz – 20kHz, 1/36 octave (19980 positions) increment
Minimun Load Inpedance 600Ω
Maximum Output Level +9dBu (600 ohms load)
Filter Gain From +12dB to -50dB, 0.25dB increment
High Pass & Low Pass Filter Q value 0.2-0.25 adjustable, 0.1 increment/ 10 bands/1 filter each output channel,
open and close
Frequency Response Bessel/ Butterworth 6/12/18/24dB each octave, and Linkwitz-Riley 24dB/ octave
Protect Function System can be set code which can prevent unauthorized person operation.
Product dimensions(mm) 482 x 125 x 44.5(1U)
Package dimensions(mm) 525 x 195 x 110(1U)
G.W 3kg
Power Consumption ≤10W

SAE reserves the right to make any changes to the product specifications without prior otice. Final specifications to be found in the user manual.