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.
Technical Parameter
| Specifications | Parameter |
| Frequency response | ±0.2dB10Hz-25kHz |
| THD+N | <0.005%@10Hz-25KHz |
| SNR | >118dB at 1% THD+N 10Hz-25KHz |
| Maximum input level | +20dBu /7.775Vrms |
| Maximum output level | +20dBu /7.775Vrms |
| Gain range | - 80dB to + 12dB per channel |
| Input impedance | >10K ohm. XLR input |
| Output impedance | < 60 ohms. XLR output |
| test signal | Independent sine wave / white noise / pink noise for each channel is optional |
| Input equalization | 12 sections (parameter / high / low rack / all pass) + 3 sections dynamic equalization |
| Extender | Threshold / ratio / start time / recovery time adjustable |
| High pass type | Ningke / Bessel / Bart 6 / 12 / 18 / 24 / 30 / 36 / 42 / 48 |
| Low pass type | Ningke / Bessel / Bart 6 / 12 / 18 / 24 / 30 / 36 / 42 / 48 |
| Adjustable delay | 1200ms / accuracy 0.01ms for each channel |
| Group delay | 2.8ms@96KHz / 1.2ms@192KHZ |
| Output equalization | 16 segments per channel, supporting parameters / high / low frame / all pass filter |
| Output FIR | Low pass / high pass / band pass direct setting, coefficient support import / export |
| DRC dynamic control | Clipping (peak or RMS value) + compression |
| Volume / mute control | Direct panel knob, total volume and mute control |
| Phase control | Input / output: 0 / 180 degree flip per channel |
| Online control | Three online modes of USB / WiFi / RS485 central control |
| Level meter | Dynamic indication of display level |
| Power range | 85V-260V 50Hz-60Hz |
| weight | Net weight: 3.6kg, gross weight: 5.2kg |
| Overall dimensions | (46 x 482 x 250mm), excluding interface |
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.