How to maintain professional audio
The acoustic characteristics of professional audio must not only meet the requirements of national standards for acoustic characteristics, but also meet the requirements of subjective listening. So how should we maintain professional audio? The latest professional audio maintenance knowledge is shared for everyone, and I hope it will help you.
The normal operating temperature of audio equipment should be 18 ℃ ～ 45 ℃. If the temperature is too low, the sensitivity of some machines (such as electronic tube machines) will be reduced; if it is too high, the components will be burned out or the components will be prematurely aged.
The audio equipment should avoid direct sunlight, and should also avoid being close to heat sources, such as heaters.
After the audio equipment is used up, each function key should be reset. Assuming that the function key is not reset for a long time, and its pulling button spring is under a long-term stress condition, it is simple to use the anomaly.
Before switching the audio power supply, turn the volume potentiometer of the power amplifier to the minimum, which is one of the most useful protection methods for the power amplifier and the speaker. At this time, the power expansion of the power amplifier is almost zero, at least when it is misused, it will not cause harm to the speaker.
Turn on from front to back when starting up, that is, turn on the CD player first, then turn on the front stage and the back stage, and turn the volume potentiometer of the power amplifier to the minimum when starting up. Turn off the power amplifier first when shutting down, so that the expansion function of the power amplifier is completely closed. At this time, when you turn off the front-end equipment, no matter how big the impact current is, it will not reach the amplifier and the speaker. When the same level is closed, the volume potentiometer of the power amplifier should be turned to the minimum, and it can be connected with the CD player before turning off or after turning off.
Audio equipment should be commonly used, but can often extend the life of the machine, such as some parts with motors (recording base, laser player, laser video disc player, etc.). Assuming that there is no tumbling for a long time, some parts will be deformed. Energize regularly, especially in wet and high-temperature seasons when it is not used for a long time. It is best to power on for half an hour every day. In this way, the heat generated during the operation of the components in the machine can be used to expel the moisture and prevent the internal coil, speaker voice coil, transformer, etc. from being damaged by moisture. Clean and moistened soft cotton cloth should be used to wipe the exterior of the machine at regular intervals; when not in use, cover the machine with a dust cover or cloth to prevent dust from entering.
From the principle of electronics, any electronic equipment should not be connected or disconnected from other equipment during live operation. I do n’t want to clarify too much that brothers can understand that active equipment is very dangerous. Even passive devices such as microphones are not recommended for live insertion. The demand reminder is that you should never turn on the amplifier to connect the speaker cable, because the speaker terminal is generally close to each other, and the speaker cable is two closely parallel. The result will be a sensitive burn down amplifier. Although some power amplifiers are equipped with protection circuits, some HI-FI grade power amplifiers often save this part of the protection method in order to improve sound quality and reduce unnecessary sound stains. Therefore, "shutdown and reconnect" is a rule that must be followed.
