Onchdbfhuu 300W Digital Amplifier Speaker Protection Board Relay Module 2.1 Three-Channel Delay

2. relay as the core component is not afraid of contact ignition and oxidation, no loss of tone transmission. 1. With time delay and DC protection (default 1.8v control, DC sensitivity can be adjusted). 4. This a common power DC protection board using optocoupler, because the optocoupler has a mutual isolation between the input and output, electrical signal transmission has a unidirectional characteristics, and thus has a good electrical insulation ability and anti-interference ability. 3. This protection board uses 1.6 thick 1A copper , double-sided tin-plating process. 5. And because the input of the optocoupler belongs to the current-type work of the low-resistance parts, thus has a strong common mode rejection ability, to achieve the separation of the power supply and the , not have an impact on the .