Audio filter output 20Hz to 20kHz for amplifier

Electronics Help Care October 21, 2024 pre-amplifier

Audio filter output 20Hz to 20kHz for amplifier:

This is the Audio filter output 20Hz to 20kHz for the amplifier. Every amplifier needs one audio graphic to control the sound quality. It starts at 20Hz, 25Hz, 30Hz, 40Hz, 50Hz, 63Hz, 80Hz, 100Hz, 125Hz, 160Hz, 200Hz, 250Hz, 350Hz, 400Hz, 510Hz, 630Hz, 800Hz, 1kHz, 1.2kHz, 1.6kHz, 2kHz, 2.5kH. Here, 9 IC TL084 is used. This circuit runs with 12-0-12 voltage and 3amperes. It needs AC voltage.

All resistors would be 1/4 watts. The PF voltage will be a minimum of 100 volts. All capacitors will be 25 volts. It’s a mono audio circuit diagram. here use TL084

TL084 Product details
Description

The TL084, TL084A, and TL084B are high-speed JFET input quad operational amplifiers incorporating well-matched, high-voltage JFET and bipolar transistors in a monolithic integrated circuit.
The devices feature high slew rates, low input bias and offset currents, and low offset voltage temperature coefficient.
Features: The wide common-mode (up to VCC+) and differential voltage range. the low input bias and offset current. the output short-circuit protection. The high input impedance JFET input stage. Internal frequency compensation. The latch-up free operation. High slew rate: 16V/µs (typ).

All amplifier needs a Speaker protection circuit. Diagram is here This is the Speaker protection circuit diagram. It can protect our Speaker from the burn. if the amplifier has any problem then this circuit can save our soundbox. Normally when the transistor makes a short circuit the voltage comes out from the speaker output line then this circuit protects that voltage. This circuit should not allow any direct voltage to be sent to the speaker. This circuit is very important for protecting the speaker.