Professional conference audio integration manufacturer

2023.04.26

Analysis and Troubleshooting of Sound Reinforcement System Failures

(1) There is cold soldering in the interconnections between components of the sound reinforcement system. When a music signal is present, these cold solder joints cause the audio signal to drop out intermittently. Solution: (2) Thoroughly inspect the wiring of all channel‑level equipment; it is best to resolder each connection point. (3) If, after a complete inspection of all soldered connections, the “click” noise persists, the issue may be a broken wire. Use a multimeter to test each conductor, and replace any cables with internal breaks.

2023.04.26

When the sound reinforcement system is muted, AC hum is severe.

1. Poor contact or cold solder joints in the shielded cables connecting equipment on each channel can cause issues. Solution: Carefully inspect the shielded cables between devices and, whenever possible, use soldering to ensure secure connections. 2. Equipment with three‑prong power plugs is connected to a two‑wire outlet, where the live and neutral wires are reversed. Solution: The live and neutral wires of the two‑wire outlet must be swapped. Typically, the left prong is neutral and the right prong is live. Power strips should have three‑prong outlets, with the top prong connected to the earth ground, ensuring electrical safety. 3. Some audio equipment uses two‑prong plugs, but certain devices require three‑prong plugs; otherwise, AC induction may occur during connection, resulting in hum or noise. Solution: Reverse the polarity of the power plug on audio equipment that originally has a two‑prong connector.

2023.04.26

When the audio system and the lighting system operate simultaneously, the audio system generates significant AC noise.

(1) The audio system and the lighting system are supplied with independent power sources; (2) The audio system is powered by an isolation transformer, whose capacity should exceed the audio system’s rated power consumption.