NL-M1000 Digital Frequency Shifter

Feedback and echo issues in public address systems have always been a headache for audio experts, especially in indoor settings like conference rooms. Some venues are surrounded by glass on all sides, with numerous microphones, making it easy to experience howling. Generally, audio engineers can only compromise by reducing microphone volume, increasing equalizers, limiters, and so on, but these measures still cannot fundamentally resolve the feedback problem.

The NL-M1000 Digital Frequency Shifter is a functional product developed by our company to professionally address common feedback (acoustic feedback) issues in public address systems, where the microphone volume is too low to increase, or where feedback is prone due to equipment issues or acoustic environments. The device utilizes adjustable digital frequency shifting technology, equalizers, and dynamic processors, combining active and passive feedback prevention to not only eliminate howling but also enhance microphone gain and eliminate echo. It also considers ease of connection with dual-channel input and stereo output, maintaining excellent sound fidelity.