NT4-K6 Series is a new generation high-performance multi-channel compact 2U rack-mounted Class D DSP professional power amplifier developed by SICA based on German DFM technology, specifically for comprehensive sound reinforcement applications. It uses DFM digital signal processing (DSP) technology, with comprehensive management and protection capabilities, providing extremely high power density to meet the needs of various venues, and its powerful signal processing capabilities further enhance product functionality.

It adopts a switch-mode active Power Factor Correction (PFC) power supply, maximizing amplifier efficiency without additional current consumption under poor power conditions, ensuring stable and efficient performance with minimal heat dissipation, greatly reducing power demands on cable specifications and power regulation.

Integrating powerful DFM DSP technology into the amplifier, seamlessly embedded into the NETCONTROL system. Based on 96kHz/32Bit floating-point operation efficient DSP and high signal-to-noise ratio circuits, it provides precise and powerful processing functions like speaker optimization settings, user-defined settings, IIR, FIR filters, DEQ (dynamic equalization), delay, limiter, etc. It supports large-scale system amplifier grouping and debugging, with functions like group gain, group delay, group IIR, etc., making debugging more efficient. The software can control and monitor up to 254 devices in real-time. Multiple network topology structures allow easy and quick configuration for complex system architecture design.

DFM's proprietary algorithm optimizes performance and system protection for each sensor, combining IIR and FIR filters to create perfect linear phase curves and significantly improve impulse response, achieving a more uniform, natural, transparent, and realistic sound experience. The latest protection system provides advanced analysis of signal levels. When sensors operate in nonlinear areas, whether high offset, high temperature, or high voltage, the protection system acts as an intelligent power regulator, extending component durability while maintaining the highest dynamic range. DSP signal and amplifier hardware dual overload protection makes the audio system safer. Thanks to DSP's excellent performance, the NT4-K6 can monitor device temperature in real-time, allowing users to more intuitively observe the working status of the amplifier equipment and take preventive measures.