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

3. This protection board uses 1.6 thick 1A copper , double-sided tin-plating process. 2. relay as the core component is not afraid of contact ignition and oxidation, no loss of tone transmission. 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. 1. With time delay and DC protection (default 1.8v start control, DC sensitivity can be adjusted). 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 .