Relay Specification
High-quality 30A relay
Professional audio, microphones and system integration

The Harmonai LD-330 is a professional-grade power sequencer designed for intelligent power management in applications such as stage lighting, audio equipment, and conference systems. It features built-in high-quality 30A relays, supports 8-channel sequential control (1-second delay per channel) and 2 bypass outputs, delivering a total of 10 output channels to flexibly meet the power requirements of complex equipment setups. Equipped with a real-time AC voltage display and universal socket design, it balances functionality and broad compatibility.
High-quality 30A relay
Independent on/off switch per channel
8 channels (1-second delay per channel)
2 channels
10 channels (8 sequential + 2 bypass)
AC voltage display showing real-time input voltage
Universal socket per channel — compatible with various plug types
USB 5V output power supply
LED indicator lighting
The LD-330 power sequencer is widely used in live stage performances, conference rooms, KTV venues, theaters, and large-scale events — wherever centralized power management and equipment protection are required. Its sequential switching function prevents grid surges caused by simultaneous device startup, extending equipment service life.
Learn more about Harmonai professional audio and lighting equipment — contact our team for detailed quotations and technical support.