Product Overview

Harmonai HK-833 is a professional-grade wireless dual-mic system engineered specifically for KTV rooms and conference environments. Featuring an innovative digital pilot tone technology, it completely eliminates cross-channel interference between adjacent rooms. Built-in feedback suppression circuitry and a specially designed mute circuit simplify setup and fully eliminate pop/click noise during microphone power-on and power-off.

The system operates in the UHF band, using phase-locked loop (PLL) frequency synthesis to deliver 100×2 channels (channel spacing: 250 kHz), with automatic interference-free channel scanning and infrared auto-pairing for fast, efficient installation. The RF section employs two-stage high-performance RF filters; the first IF uses a surface acoustic wave (SAW) filter, and the second IF uses a three-stage ceramic filter—ensuring excellent interference rejection.

The microphones feature aluminum bodies with integrated LCD displays and support 42-step adjustable transmission power, enabling stable operation at distances exceeding 50 meters under ideal conditions. Powered by readily available AA batteries and featuring dual-boost design, performance remains consistent even as battery voltage drops—delivering 6–10 hours of continuous use. Designed exclusively for KTV engineering deployments, one receiver supports two microphones, enabling rapid configuration across 100+ KTV rooms with simple maintenance.

Recommended Applications

KTV Rooms: Engineering-grade design—supports simultaneous operation across 100+ rooms without interference, with fast and simple maintenance.
Conference Rooms: Stable UHF transmission with over 50-meter operating range; plug-and-play infrared auto-pairing.
Live Events: 42-step power adjustment adapts to varying venue sizes; feedback suppression ensures clean, clear audio.
Educational & Training Settings: Mute circuit eliminates switching noise; dual-boost design guarantees long-term stable operation.