LD448 uses advanced dual-core DSP technology and supports 64-bit floating-point arithmetic. The ADC part uses a 768Khz/32-bit high performance audio converter. All the algorithms are processed by a pair of 500MHz high performance DSP.Digital processing includes: gain, polarity conversion, dynamic equalizer, graphic equalizer, parametric equalizer trellis filter, time delay, frequency division, voltage limit and signal routing. All inputs and outputs are amplified using differential balance to improve signal anti-jamming ability and signal integrity.
Following the latest FIR digital filter design, low pass, high pass, band pass and band stop filters can be designed to extract the desired signal and suppress the unwanted signal to a large extent.
All audio interfaces use the standard Kanon (XLR) interface.
The LD448 can store up to 32 presets. It is convenient for users to save calls at any time.
The LD448 input equalizer has 15 segments of parametric equalization. 5-segment dynamic equalization; 31 section diagram equalizer, largely to meet a variety of tuning needs
◎ Chinese-English high-definition LCD screen, intuitive functional operation interface
◎ Built-in signal generator, convenient for on-site debugging and sound correction
The input is equipped with noise gate and the output voltage limiter function
◎ Independent input and output channel level indication
◎ Support panel lock and engineering lock function
◎ Balanced input and output XLR speakers with special PC control software
Frequency response: 20Hz-20kHz, ±0.25dB
Distortion (THD + N) : <0.01%
◎ Dynamic range: >110
◎ Maximum delay: 682ms on inputs, 682ms on outputs
Output gain adjustment: -40dB to +12dB
◎ Parametric equalization: 6 segments per input, 4 segments per output
◎ Input graphic equalization: No
Frequency divider: 12,18,24, or 48dB per octave
Limiter threshold: -20 to +20dBu
◎ Maximum output level: +20dBu
◎ Input impedance: 18kΩ
◎ Output impedance: 100Ω
Power requirement: 90-240 VAC
Size (W×H×D, mm) : 483×44.4×203
◎ Net weight: about 4.05kg
