Foshan Xinghongde Technology Co., Ltd.
Focus Us On
DOWNLOAD

Misunderstanding of Amplifier Power Switch

Usually, in order to save time and convenience, we will unplug the amplifier power switch when it is turned off, and also directly unplug when it is turned on. In fact, seemingly simple and convenient operation, there are great hidden dangers. (Next, please delineate the key points consciously) Because such operation will generate surge current and reverse peak voltage, it is easy to damage audio equipment and amplifier power switch, thereby reducing the life of the audio system and increasing the purchase cost.

What is surge current?

Sound equipment is composed of resistors, capacitors, inductors, transformers and other components. They are all in a cold state before starting. When the speaker power supply is turned on, the switching resistance of the amplifier power switch is small, so the instantaneous current is very large, which is 2.5-3.5 times the normal working current. This current is called surge current.

What is backpeak voltage?

Inductive elements, transformers and other units have a characteristic that when a voltage is added or removed in the circuit, the unit will produce a back EMF to prevent the voltage from changing. Then when a voltage is applied to the inductor, it produces a back EMF to prevent the voltage from being established, but the energy of the power supply voltage keeps on flowing, so the back EMF only acts as a voltage damper and has little effect on the circuit. However, the situation is different when the power is off. When the power is off, there is no obstruction in the circuit to produce a back EMF. This voltage is the back peak voltage. The reverse peak voltage is 9 times the normal voltage.
Related News
  • The Excellent Development Prospect of Digital Public Adress System

    The Excellent Development Prospect of Digital Public Adress System

    April 24, 2019The digital public address system is managed by the users themselves, which provides business and emergency broadcasting for the public and background music within the scope of the building. At presen...view
  • Design of Public Address System

    Design of Public Address System

    July 30, 20211. The composition of the best public address systemThe public address system is a branch of the sound reinforcement system and the sound reinforcement system, also known as the professional sound sys...view
  • Working Principle of Zone Selector Circuit

    Working Principle of Zone Selector Circuit

    April 24, 2019The zone selector circuit consists of transistor V, diode VD, thyristor VTl-VW, control button Sl-S4, sound source indicator light emitting diode VLl-VL4, relay Kl-K4, resistor Rl, and sound source in...view
  • The Introduction of the Commercial Speaker System

    The Introduction of the Commercial Speaker System

    April 24, 2019Commercial speaker system is a professional sound reinforcement system designed for various entertainment clubs, multi-functional halls, small and medium-sized performances and hall sound reinforcemen...view
  • An Overview of Type D Amplifier

    An Overview of Type D Amplifier

    April 24, 2019The type d amplifier drives the amplifier of the loudspeaker by controlling ON/OFF of the switching unit. The type d amplifier was first introduced in 1958, and it has gradually become popular in rece...view
  • RH-AUDIO Commercial Speaker System Creates Music Feast

    RH-AUDIO Commercial Speaker System Creates Music Feast

    April 24, 2019A good restaurant environment is not only reflected in the sense of taste, but also in the perfect combination of architectural space and sound to bring customers the best sensory experience. To this ...view
chat
  • TEL:+86-13076829269
  • FAX:
  • EMAIL:info@rh-audio.net
  • ADDRESS:No. 601-2,602,603,Building 11,Zone 2,Wanyang S&T Park,Beijiao Town,Shunde District,Foshan City,Guangdong Province,China