Fir Filter Wifi 4X8 Audio Processor Digital Speaker Processor
With FIR filter function
Voltage: AC90V-AC240V
Frequency range: 20Hz-20KHz
12 sections of EQ can be adjusted for each channel
WiFi / RS485 central control and drive free USB control interface
LA448 adopts latest fourth generation processor, with many conventional audio algorithms such as routing / gain / delay / compression / amplitude limiting / mute / equalization / high-low pass filter / all pass filter and phase.
In addition, the following personalized functions are added, and each function is completely closed or opened independently.
FEATURE :
► 96KHz / 192Khz sampling rate switching, with both functions, brings more application scenarios.
► Dynamic equalizer is automatically optimized for large signal or small signal.
► FIR filter can perfectly correct the phase distortion caused by system parameter adjustment.
► The delay of each channel is up to 1200ms, and the precision is optimized to 0.01ms with the fine adjustment of sound field or phase.
► 4-way input and 8-way output, complete routing assignment, can be set to multiple working modes.
► Color LCD display, real-time dynamic level display, Chinese and English interface optional.
► One key mute and global total volume control.
► Equipped with WiFi / RS485 central control and drive free USB control interface, which can be adjusted by the control software at the PC.
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Specifications
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Parameter
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Frequency response
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±0.2dB10Hz-25kHz
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THD+N
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<0.005%@10Hz-25KHz
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SNR
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>118dB at 1% THD+N 10Hz-25KHz
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Maximum input level
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+20dBu /7.775Vrms
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Maximum output level
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+20dBu /7.775Vrms
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Gain range
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- 80dB to + 12dB per channel
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Input impedance
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>10K ohm. XLR input
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Output impedance
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< 60 ohms. XLR output
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test signal
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Independent sine wave / white noise / pink noise for each channel is optional
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Input equalization
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12 sections (parameter / high / low rack / all pass) + 3 sections dynamic equalization
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Extender
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Threshold / ratio / start time / recovery time adjustable
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High pass type
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Ningke / Bessel / Bart 6 / 12 / 18 / 24 / 30 / 36 / 42 / 48
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Low pass type
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Ningke / Bessel / Bart 6 / 12 / 18 / 24 / 30 / 36 / 42 / 48
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Adjustable delay
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1200ms / accuracy 0.01ms for each channel
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Group delay
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2.8ms@96KHz / 1.2ms@192KHZ
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Output equalization
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16 segments per channel, supporting parameters / high / low frame / all pass filter
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Output FIR
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Low pass / high pass / band pass direct setting, coefficient support import / export
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DRC dynamic control
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Clipping (peak or RMS value) + compression
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Volume / mute control
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Direct panel knob, total volume and mute control
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Phase control
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Input / output: 0 / 180 degree flip per channel
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Online control
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Three online modes of USB / WiFi / RS485 central control
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Level meter
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Dynamic indication of display level
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Power range
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85V-260V 50Hz-60Hz
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weight
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Net weight: 3.6kg, gross weight: 5.2kg
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Overall dimensions
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(46 x 482 x 250mm), excluding interface
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Software Interface
①The machine is equipped with PC side control software, which can control the machine remotely through WiFi / RS485 / USB port, and the PC side operation is more intuitive and fast.
②The following figure shows the signal flow and algorithm composition of the machine.
