Bass Booster Circuit using Op-Amp 741 IC

Here is one another basic project call bass booster using op-amp 741 IC. The circuit bass booster increases beat frequency without affecting high frequency.

Description of Bass Booster Circuit using Op-Amp 741 IC

The circuit of bass booster shown in figure 1 is divided into two main section i.e. bypass high frequency and boost section. The input of this circuit is connected to the output of pre-amplifier circuit and it’s output to input of power amplifier circuit. When audio signal is given to the input, high frequency is passed through capacitor C1 and low frequency is passed through resistor R1. Operational amplifier IC, 741 (IC1) is used to boost the low frequency. Resistor R2 is used as feedback resistor where VR2 is used to control the boost power.

circuit diagram of bass booster

When high frequency signal is detected at pin 2 of IC1, it bypass to ground through capacitor C2. Switch SW1 is used to ON/OFF the boosting affect. It is necessary to used shielded wire in input and output. VR1 is used to stabilize over loading.

bass booster circuit design

Check out other audio audio and bass related circuit posted in bestengineeringprojects.com

  1. Bass Treble Circuit
  2. Tone Control Circuit (Active and passive)
  3. Low Pass Filter Circuit | Low Pass Filter Design
  4. High Pass Filter Circuit | Rumble Filter

Simulation of Bass Booster Circuit using Proteus ISIS:Simulation circuit when switch is on

Simulation circuit when switch is off

Tips for Better Bass in Corner: The base response of a loudspeaker can be improved by placing the speaker enclosure in the corner of a room where the walls meet. the walls extend outwards and from the mouth of a huge horn, with the speaker acting as the driving source. The effect raises the acoustic load on the speaker and couples more audio energy into the surrounding air. This arrangement is especially useful for reinforcing the base tones of a small speaker.

Although the best corner to locate a speaker is one where the walls meet, do not overlook other areas that might create the horn loading effect – where a wall and ceiling meet, or at the junction of a partition or room divider and the floor. If the speaker cabinet is portable, a convincing experiment is to move it toward a corner while it is playing. The improvement noticed in the last few feet can be surprising.

PARTS LIST OF BASS BOOSTER CIRCUIT USING OP-AMP 741 IC

Resistor (all ¼-watt, ± 5% Carbon)
R1 = 150 KΩ

R2 = 6.8 KΩ

R3 = 100 KΩ

R4 = 220 KΩ

R5 = 10Ω

R6 = 2.2 KΩ

VR1 = 1 KΩ

VR2 = 10 KΩ

Capacitors
C1 – C3 = 0.01 µF (Ceramic Disc)

C4 – C6 = 10 µF, 16V (Electrolytic capacitor)

Semiconductors
IC1 = 741 (General Purpose Operational Amplifier IC)

T1 = BC148 (General purpose silicon NPN transistor)

Miscellaneous
SW1 = ON/OFF Switch

 

6 Thoughts to “Bass Booster Circuit using Op-Amp 741 IC”

  1. tushar khairnar

    what is i/p & o/p For this ckt plz reply

    1. As i had listed above “The input of this circuit is connected to the output of pre-amplifier circuit and it’s output to input of power amplifier circuit.”

      1. Ismail

        Can you give some specifications regd. the pre-amplifier and power amplifier for this circuit and also some suggestions regd. them

  2. Ismail

    I want to this circuit as my miniproject.Can you help me regd. specifications of i/p pre-amplifier and output power amplifer

  3. NITESH KUMAR

    what is the function of VR2 in this circuit.

    1. As i had already mention in circuit description section, “VR2 is used to control the boost power.”

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