Weak current College】 【KTV mixer control Essentials --- Power By】 【China power house network.

Master the correct switch order
Mixer power on the attenuation of faders before should be placed in a minimum location to prevent the surge voltage impulse sound source processing equipment and power equipment.
Open the mixer power, in accordance with the first small signal, after large-signal ", open source and peripheral device power, then open the amplifier's power. Shutdown before the attenuation faders to La, at the same time power discharge flat tuning knob to a minimum, in accordance with "first closed after large signal, turn signal, turn off power amplifier power, sound mixer power and other device power.

Selecting the right input level
Fixed value decay key PAD and GAIN-gain control knob with use, adjust the input level. Signal level is too large, such as CD,
ID, VCD, DVD player, double deck, high level audio sources are to PAD keys pressed in order to ensure that the signal level does not exceed the input level of dynamic range, so that it is in good working condition. When the input level in-between-the-60dB, the GAIN knob to adjust the fit of gain. For example, audio source is low sensitivity dynamic microphone (sensitivity is-55dB), you do not need to PAD the key pressed, you can GAIN knob placed-55dB corresponding location. If this is the high sensitivity of the microphone (sensitivity is-35--45dB) will be able to GAIN knob placed-35--45dB corresponding location, so that the input level is appropriate, at this time of distortion and noise are low. In General, in the fixed occasions where fine GAIN should not go after moving it. Never adjust the GAIN to change the volume.

Correctly adjust the input level and the input gain
Min level faders and input gain control to match the appropriate, such as min faders is too low, and the gain is too large, when the signal input, min faders has not reduced margin, so it is easy to cause overload; if someone accidentally pushed the faders, produces the damage after the class amplifier and speaker of the serious consequences. Correct adjustment method is:
(A) initially, faders and the gain knob will be transferred to a minimum.
(B) of the faders to 70% (no more than the master faders).
(C) slowly rotate the gain knob to CLIP light is not flashing the position before. If the input channel receives a microphone signal, rotate the gain knob, when the receiver is then generated screech to a level of direction cycles is a suitable location. Never adjust the input gain to alter the volume size, so that the cause of the overload distortion or a lower signal to noise ratio, after the class irreparable, to change the channel signal strength, volume size, adjust the channel faders should be.