TONE, TREBLE, BASS, BALANCE, MIC CONTROL IN AMPLIFIER
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On: 27 Nop, 2020
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This tone control is usually referred to as a tone control. Basically, a tone control or tone control is a series consisting of parts that function to regulate and generate the frequency of an audio circuit that can be adjusted or processed accord...
This tone control is usually referred to as a tone control. Basically, a tone control or tone control is a series consisting of parts that function to regulate and generate the frequency of an audio circuit that can be adjusted or processed according to the taste of the listener.
In everyday use, the tone control has had a lot of development, so that various forms and kinds of constructions and sequences have been made, ranging from very simple to those with better tone settings and sound quality.
The main parts of a tone control are as follows:
a. Volume control
b. Treble control
c. Low pitch control (bass control)
d. Left and right balance (balance), for this section only used in a stereo amplifier circuit (double).
III.l Volume control
In this part of controlling the loudness or volume control, it is a part that plays a very important role in a series of tone controls. Because this part determines how hard or weak a tone (sound) is on the audio amplifier. This sound control circuit or volume control can usually be placed on the front (input section) of the tone control or it can also be placed on the back (output section) of a tone controller, namely by using a. potentiometer with a predetermined resistance value. For more details about the installation of this protein meter, pay attention to the following picture.
Location of the volume control on the input of the tone control
The location of the volume control at the output of the tone control
This high pitch control or treble control is one part of the tone control that functions to adjust the high tone. In this part of the tone control, it is carried out by a small capacity capacitor connected in series with a resistance or resistor, or usually without the use of resistance or resistor.
The capacitor used in this high tone regulator (treble control) has a smaller capacity, when compared to the capacitor used in the low tone regulator (bass control). As for the shape of the series of high pitch control of a tone control as shown in the picture below:
The shape of the high pitch control
Low pitch control (bass control)
Low tone control or bass control is one part of the tone control which functions to adjust the low tone. In this part of the tone control, it is carried out by a capacitor with a rather large capacity connected parallel to a potentiometer. The capacitor used in this low tone regulator (bass control) has a larger capacity, when compared to the capacitor used in the high pitch control (treble control). The form of a series of low tone regulators of a tone control is shown in the picture below:
The shape of the lower pitch control
Left and right tone counter (balance)
In this part of the control or counterweight of the left and right tones, this is only used for the stereo power amplifier, because in principle one stereo power amplifier consists of two mono power amplifiers and two separate mono pre amplifiers, as well as two integrated tone control units. in a series or separate in the way the sound is arranged. As for how to install this balance as shown in Figure 2 and Figure 3 above.
IV. PRE AMP MICROFON (MIC)
The pre amp microphone or microphone pre amplifier is a circuit that functions to change the frequency of the sound coming from the microphone, and then the frequency of the sound needs to be strengthened again to get a sound amplifier which is usually called a power amplifier, from the power amplifier it is continued to a sound instrument called the loud speaker of the loud speaker sound louder.
A good quality pre-amplifier microphones must be able to generate clean and clear sound frequencies so that the speaker's voice can be amplified with an amplifier and continued to the loudspeaker.
Microphones can produce clear and pleasant sound frequencies, then we can strengthen them again with a power amplifier and a loud speaker to be used in lectures and at parties.
Here are several types of pre-amp microphones that are widely used in electronics practice.
a. pre amp microphone using one transistor (one level)
b. pre amp microphone using two transistors (two levels)
c. pre amp microphone using three transistors (three levels)
d. pre amp microphones using six buh transistors that can be combined with a stereo mixer.
IV.l Pre amp microphone using one transistor (one level)
In the microphone pre amp circuit using one transistor, this is the simplest type of pre-amp microphone. In this circuit you can use DC voltages ranging from 6 Volts to 24 Volts, as for the form of the circuit as shown in the image on the following page.
IV.4 Pre amp microphone using six transistors which can be combined with a stereo mixer
If the pre-amp microphones previously were good using one transistor, two transistors and three transistors, if you want to make it into a stereo we have to make one more unit. But in the pre-amp, which uses six transistors, it is enough to make one unit and one unit of this circuit whose narrative can be combined directly with a stereo mixer which can then be directly inserted into the stereo power amplifier. As for the circuit form of the pre amp microphones using six transistors as shown in the following figure.
Microphone pre amp circuit using six transistors
which can be directly connected with a stereo mixer
List of components:
R1,8, l4 = 2,2 K ohms Pot3 mono = 100 k ohms
R2 = 47 K ohms VR = 20 K ohms
R3 = 2.2 M ohms C1 = 22 µf / 16 V
R4,25 = 180 K ohms C2,6 = 100 µf / 16 V
R5 = 270 ohms C3 = 200 nf
R6,24 = 15 K ohms C4 = 10 µf / 25 V
R7,9 = 470 K ohms C5 = 100 nf
R10 = 1.2 K ohms C7 = 10 nf
R11 = 18 K ohms C8 = 47 nf
R12,13,27 = 12 K ohms C9 = 220 µf / 16 V
R15 = 150 K ohms C10 = 1 µf / 50 V
R16,26 = 1 K ohm C11,12 = 22 µf / 25 V
R17 = 22 ohms C13 = 1 µf / 25 V
R18,19,20,21 = 10 K ohms Tr1,3 = C 694
R22 = 3 K ohms Tr2,4 = C 536
R23 = 220 K ohms Tr5,6 = C 828
R28 = 100 ohms
Pot 1 mono = 50 K ohms
Pot2,4,5 mono =
In this series of pre amp microphones have the ability and sound quality is good, because with the tone control which only applies a passive filter system, so the hum and noise sounds only small.
In this circuit also has a facility, PANPOT, which in this circuit functions when used for stereo systems, which is to adjust the size of the output of the pre-amp series of the Kemixer L and R microphones. ECHO series on each channel and the echo setting using the EFFECT potentiary, the EFFECT output can be paralleled up to six series and directly connected to the ECHO input section (SEND). In this microphone pre amp circuit uses a DC voltage source of 15 volts.
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