Professional Dual channel Pre-amplifier Preamp Tone adjust board Dual AC9-15V

Grade fever pre-preamp tone board

With volume control

Audio conversion enthusiasts modified parts!

Let you enjoy all kinds of sound effects as you like!

(Also called Nie equalizer, from the tuning effect)

The installation location is to use the RCA audio cable to connect the tone after the host output low level (mobile phone tablet MP3 CD DVD), and input the signal to it. Then receive the amplifier from the tone through the RCA audio cable.

That is, if he does not receive power amplifiers, he cannot use them. Only in the case of power amplifiers can he play the role of tone.

But its practical role is not just tuning, but there are many practical and convenient uses:

1. With the amplifier, there is a clear role in enhancing the bass.

Such as computers, MP3s, mobile phones, CDs, DVD players, etc.... The output of audio signals from the original host is typically 0.8 to 1.2 volts, and the audio signal coming out of this tone is 5 volts. Everyone knows why the sound quality of the host is not good. Because the output signal voltage is small, that music signal is the strongest bass signal, so the original host output of 0.8 to 1.2 volts simply can not produce a good bass.

2. When the volume is very light, the music signal is still clear and powerful. (The reason is the same as the output signal is 5 volts.)

3. It is suitable for listening to MP3 music downloaded online to make up for the lack of sound quality on the download music car.

    Many users now prefer to use a card or listen to music using Apple IPOD. We all know that these music signal formats do not always have good CD sound quality. It can be used to compensate for the lack of sound quality by adjusting some of the music signals at the back. For example, the song sounds lighter - you can use the knob to increase the midrange and midrange sounds. If you think that music is not high enough - you can use the knob to increase (but do not add too much high-pitched, because many of the small treble power itself is very small, plus too much easy to burn treble.) Then some friends like to listen to Tsai Chin, her singing voice The phenomenon of heavy nasal sound, that is, bass (bass) turned slightly smaller, it is resolved.

Finally reminded: the adjustment of the tone board tips, in the normal under the first adjustment of all potentiometers are closed, and then slowly one by one potentiometer to the midpoint, what is the midpoint is the potentiometer to open Half of the meaning, if you feel that the tone is not enough to adjust the potentiometer again.

There may be some reasons why you want to tune to the midpoint, explain the original sound source is generally in the 3db, the potentiometer is at the midpoint of the 3db position, potentiometer total equalization range: +/- 12db

At the same time you want to listen to high-pitched friends, you should adjust the bass part to a lower level, and you can use a higher pitch tones. There are still some inertia problems that friends often have. They want to listen to treble points. , but it feels inadequate. Why is it not enough? Because you will increase the bass and then adjust the tone, so the bass oversharpened, then you just press the "neutral position" to adjust it.

Some individuals who are not very good friends will use all the potentiometers to their maximum, which is not enough. Because few amplifiers can suffer, all the frequencies will be distorted under the highest conditions and why they will be distorted. In the following explanations, the original sound source is generally 3db, and our tuning board is in the equalization range: +/-12db, so it will be distorted. We have also tried it. When the FM frequency is increased to the maximum, it is also It is not distorted, but it can be distorted after two or more of them have been added to the maximum, so don't adjust everything to the maximum. That would be counterproductive.

Adjust the potentiometer to make sense of twist. Under the experience, we will understand more slowly.