Some friends to buy audio, compared two stereo sound quality, will often misled by businessmen fool.
Businesses will turn the two stereo encoder to a particular location, for example, is the location of people used to place compared with the position of the clocks, called open until 12 o 'clock, whose volume is big, then listen to the who is sentenced to power.
In fact this is totally misleading because the comparison method often contrary to the actual results, even unscrupulous merchants or manufacturers use to make you fall into the trap.
So this kind of judgment method actually wrong?
Encoder plays a decisive role in the volume of the sound, this you know?
On this question, you may be misled by two illusion.
First, the machine gain size of illusion.
Second, the illusion caused by the characteristics of the encoder.
The following is the characteristics of the encoder to illustrate the intricacies of the meantime.
Encoder is good or bad decision stereo sound size?
Is actually a linear encoder has played a decisive role.
Encoder is a change of signal strength parts, rotary encoder is actually the process of changing the attenuation coefficient, minimum position is zero, the largest position is 1.
But in the process of a certain position corresponding to the attenuation coefficient of each encoder is not the same, such as spin to half the position is not attenuation coefficient is 0.
If is half attenuation coefficient is half, 1/4 attenuation coefficient is 1/4, this encoder is called linear encoder.
But people have long been aware of our human ear's sense of the volume is not linear, the signal attenuation by half sound does not feel is small by half, in order to make the attenuation process can meet the characteristics of human listening, and there was a feature called index of the encoder.
Index characteristic performance attenuation characteristic of first slow, quick, but because it is offset by the human ear listening on the nonlinear, on the contrary make listening feel is uniform.
So in the classical theory of circuit design, the volume is exponential encoder.
If you are using a linear encoder to do volume encoder, when a little volume will feel great.
In the dead of night, unable to get smaller volume, is difficult to control the volume.
This is because the machine too fast can reach its maximum power output, actually to raise again increase the power output of the machine is very limited, even distortion.
As for the front say the index of encoder, compared with the linear encoder, using the encoder position in the same volume can feel small, but don't have to worry about maximum output power loss.
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