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The 600W Audio Amplifier Circuit Diagram is based around {LM4702}manufactured by NATIONAL semiconductors&{MJ11029-MJ11028} by ON semiconductors It is a high fidelity audio power amplifier. Designed for demanding consumer and pro-audio applications. You can also use this circuit with AV receivers, Audiophile power amps, Pro Audio High voltage industrial applications etc Amplifier output power maybe scaled by changing the supply voltage and number of output devices. The circuit includes thermal shutdown circuitry that activates when the die temperature exceeds 150°c. CIRCUIT’s mute function, when activated, mutes the input drive signal and forces the amplifier output to a quiescent state.  Simple 600W Audio Amplifier Circuit Diagram Power: Maximum Output power @ 8ohms : 300watt Absolute max power supply voltage :±38V to ±40V Recommended power supply voltage :±30V to ±35V

This project is an audio amplifier based on TDA2050 and LM1875. This is not an ordinary project, but an attempt to make a PCB that is suitable for TDA2050 and LM1875 and has all the necessary circuitry on board – power supply, speaker protection, delayed turn-on and fast turn-off. This is achieved using the convenient uPC1237 IC. TDA2050 and LM1875 are pin to pin compatible, the differences in their schematics are the values of a couple resistors and one capacitor. All this allows to make an universal circuit board, suitable for any of these two ICs. [ ]

Detects clipping in preamp stages, mixers, amplifiers etc., Single LED display - 9V Battery supply unit This circuit was intended to be used as a separate, portable unit, to signal by means of a LED when the output wave form of a particular audio stage is "clipping" i.e. is reaching the onset of its maximum permitted peak-to-peak voltage value before an overload is occurring. This will help the operator in preventing severe, audible distortion to be generated through the audio equipment chain. This unit is particularly useful in signaling overload of the input stages in mixers, PA or musical instruments amplification chains, but is also suited to power amplifiers. A careful setting of Trimmer R5 will allow triggering of the LED with a wide range of peak-to-peak input voltages, in order to suit different requirements. Unfortunately, an oscilloscope and a sine wave frequency generator are required to accurately setup this circuit. Obviously, the unit can be embedded into an e...

This active audio audio system use three TDA2052 chips and 5 speakers ( one woofer, two tweeters and two midranges ) .For this TDA2052 active audio system we need dual 20 volts power supply and five volts supply for the stand by function.To the input of the every audio IC chip is placed an audio filter for filtering the audio signal for used speakers ( low pass for woofer , high pass for midranges and tweeters ) Active Audio System Circuit Diagram The subwoofer plays the 20 to 300 Hz frequency range, while the remaining 300 Hz to 20KHz are sent to two separate channels with stereo effect.If one of the amplifier is affected by clipping distortion the others amplifiers are not affected .

For mono output amplifier application,  TDA7056  IC can be your option. Compact but powerful, this integrated circuit is contained in a 9 pin medium power package. This device is designed f or battery fed portable equipments such as mono recorders, radios and television. To attract the market, TDA7056 has many features such as low power consumption. For more reliable operation, TDA7056 also has short circuit proof and ESD (Electro Static Discharge) protected on all pins.  Designing application with this IC should be easy since no external components is needed. To make sure you’ll love this chip, this device also has no switch on/off clicks. Overall, TDA7056 has good stability.  TDA7056 3W BTL Mono Audio Power Amplifier Circuit Diagram

Description: The NTE1373 is an integrated circuit designed for use as a 7.5W (16W, 4Ω) power amplifier output  with low noise and low distortion suitable for TV sets with multi−sound.  Stereo operation is possible due to incorporating two amplifiers on one 12−Lead SIP type chip. Features: Built−In Protection Circuits (Surge, Thermal Protection, etc.) Automatic Operating Point Stabilizer Circuit Low Distortion, Low 1/f Noise Low Shock Noise from Power ON/OFF Operation Better Channel Separation Few External Components Required

LA4446 is of similar series IC as LA4440, but it is meant for dual or stereo 5.5Watt RMS outputs. While 4440 gives 6Watt outputs at dual mode, this gives almost same but with much smaller package size. The IC package is mall but it provides same functionality and special features like LA4440. These are, Low pop noise at power ON/OFF time Good ripple rejection: 46dB(typ) Good channel separation Low residual noise (Rg=0) On chip protectors as Thermal protector, Over-voltage/Surge Protector, and pin short protector The below circuit is the application circuit of LA4446 IC. 

12 V AUDIO AMPLIFIER WITH TRANSISTOR ELECTRONIC DIAGRAM In use, R9 should be carefully adjusted to provide minimal audible signal cross-over distortion consistent with minimal measured quiescent current consumption; a good compromise is to set the quiescent current at about 10-15 mA.To measure this current, wire a DC current meter temporarily in series with the collector of Q3. List Component P1_____________10K Log.Potentiometer R1,R2__________33K 1/4W Resistors R3_____________33R 1/4W Resistor R4_____________15K 1/4W Resistor R5,R6___________1K 1/4W Resistors R7____________680R 1/4W Resistor R8____________120R 1/2W Resistor R9____________100R 1/2W Trimmer Cermet C1,C2__________10µF 63V Electrolytic Capacitors C3____________100µF 25V Electrolytic Capacitor C4,C7_________470µF 25V Electrolytic Capacitors C5_____________47pF 63V Ceramic Capacitor C6____________220nF 63V Polyester Capacitor C8___________1000µF 25V Electrolytic Capacitor D1___________1N4148 75V 150mA Diode Q1____________BC...

Mic Audio Amplifier Circuit Diagram.The compact, low-cost condenser mic audio amplifier described here provides good-quality audio of 0.5 watts at 4.5 volts. It can be used as part of intercoms, walkie-talkies, low-power transmitters, and packet radio receivers. Transistors T1 and T2 form the mic preamplifier.  Resistor R1 provides the necessary bias for the condenser mic while preset VR1 functions as gain control for varying its gain. In order to increase the audio power, the low-level audio output from the preamplifier stage is coupled via coupling capacitor C7 to the audio power amplifier built around BEL1895 IC.BEL1895 is a monolithic audio power amplifier IC designed specifically for sensitive AM radio applications that delivers 1 watt into 4 ohms at 6V power supply voltage.  It exhibits low distortion and noise and operates over 3V-9V supply voltage, which makes it ideal for battery operation. A turn-on pop reduction circuit prevents thud when the power supply is switche...

Although the modular Portable Mixer architecture accessible on these web pages has become a hit for abounding amateurs, some correspondents appropriate a abundant simpler device, mainly for bond address signals. This architecture should fulfil their needs, featuring three inputs with switchable high/low acuteness and abnormal level-control circuits, accouterment aerial afflict margins and low-noise figures, proportional to gain-level settings. Low accepted burning due to a simple, five-transistor circuitry, allows the Mini Mixer to be powered by a accepted 9V PP3 array for abounding hours.

The LM4610 is a DC controlled Tone (bass/treble), volume and balance circuit for stereo applications in car Radio TV and Audio systems. It also features Nationals 3D-Sound Cir- cuitry which CAN be externally adjusted via a simple RC Net- work. An additional control input allows loudness compensa- tion to be simply effected. Four control inputs pro visit page. Multi-channel Audio Codec With Stereo Headphone Amplifier

With the amount of equipment in home entertainment centers today the need to be able to vary the gain of the audio or video signal is needed. I found this particular circuit helpful when used in conjunction with the Universal De scrambler and a Stabilizer circuit I built for making copies of video tapes. It not only allowed me the ability to fine tune the video strength it also helped me increase the recorded audio which typically becomes poor when making tape copies. Circuit operation is straight forward for amplifier circuits. The second channel for the audio amplifier is made up of the same components except the other half of IC1 is used. Pin 6 & 5 are inputs and 7 is the output. Audio/Video Distribution Amplifier Circuit Diagram

This amplifier circuit based on IC TDA2612 produced by siemens , minimum voltage require for this circuit is 10 Volts and amximum voltage require 35 volts DC. Power output 25 watt with 4 ohm impedance.Frequncy response 20Hz to 20kHz. Quiescent current is 70 mA. This is a mono circuit amplifier. See circuit below :    You can use the circuit above at : Car Tuner Pre amp Head Pre amp Mic Personal Computer  Portable media Player etc. Some advantage of the circuit : Fairly high voltage Low noise sound output Easy to make Components are easy to find

This circuit is similar to the one above but uses positive feedback to get a little more amplitude to the speaker. I copied it from a small 5 transistor radio that uses a 25 ohm speaker. In the circuit above, the load resistor for the driver transistor is tied directly to the + supply. This has a disadvantage in that as the output moves positive, the drop across the 470 ohm resistor decreases which reduces the base current to the top NPN transistor. Thus the output cannot move all the way to the + supply because there wouldn't be any voltage across the 470 resistor and no base current to the NPN transistor. Circuit diagram : 3 Transistor Audio Amp Circuit Diagram This circuit corrects the problem somewhat and allows a larger voltage swing and probably more output power, but I don't know how much without doing a lot of testing. The output still won't move more than a couple volts using small transistors since the peak current won't be more than 100mA or so into a 2...

Audio Power Amplifier is an important part in sound reproduction ina sound system. Audio Power Amplifier with this power IC LM 3886Audio Power Amplifier is a highly capable and able to produce68 Watt power avg. 4Ohm load and capable of producing power 38 Watt8Ohm load. With good sound reproduction capabilities of 20Hz-20kHz also possessed this LM3886 Audio Power Amplifier. Audio Power Amplifier LM3886 Speaker is equipped with protection that will protect the circuit output from over-voltage, under-voltage, over-loads, a short circuit power supply, thermal run-away and the temperature peak. Audio Power Amplifier LM3886 also equipped with noise reduction that can keep the audio system from noise well. Schematic power amplifier with LM3886 Feature owned LM3886 Audio Power Amplifie r 68W cont. avg. output power into 4Ω at VCC = ± 28V 38W cont. avg. output power into 8Ω at VCC = ± 28V 50W cont. avg. output power into 8Ω at VCC = ± 35V 135W instantaneous peak out...

MINI AUDIO AMPLIFIER ELECTRONIC CIRCUIT DIAGRAM The 8k2 across the 47u sets the emitter voltage on the BC 547 and this turns it on. The collector is directly connected to the base of a BC 557, called the driver transistor. Both these transistors are now turned on and the output of the BC 557 causes current to flow through the 1k and 470R resistors so that the voltage developed across each resistor turns on the two output transistors. The end result is mid-rail voltage on the join of the two emitters. The two most critical components are 8k2 between the emitter of the first transistor and 0v rail and the 470R resistor.

There are many low power SSB rigs and kits don’t have any real speech processor circuitry, although there is a built in speech processor in most modern HF. Speech processing is an important thing, when the SSB is operated at low power to get through the QRM. Speech processing can be done by this circuit. This is a simple and low cost circuit but it can perform well. This circuit includes the microphone element. So, we can assemble complete speech processor microphone in an old defunct desk mike. Here is the schematic diagram of this circuit : This circuit contains a feedback amplifier and an audio preamplifier. S1 should be closed, to use the speech processor. R5 is used as the gain control for basic preamplified microphone that is given by Leaving S1 open. Q2 is triggered to conduct by voice peaks from the feedback amplifier, when S1 is closed. It causing the gate of Q1 to become negative. The resistance between the source and drain of Q1 substantially increase due to the gate of Q1 b...

Remote Audio Level Indicator Circuit Diagram. The normal level-indicator circuits which are available in the market require connections to be made to the output of the player, which may not be easily accessible. The audio level indicator circuit described here removes this restriction as it may be placed close to the player’s speakers and yet the desired effect can be realized. Remote Audio Level Indicator Circuit Diagram : Remote Audio Level Indicator Circuit Diagram As shown in the circuit, signals are picked up by the condenser microphone, which get further amplified by the noninverting amplifier built around one of the four op-amps of LM324. The remaining three, along with four op-amps of the second LM324, are used as seven comparators to work as the level detector, giving seven output levels through seven coloured LEDs.  The sensitivity of the audio level indicator circuit may be improved by varying the 220k potentiometer. If a fine adjustment is desired, a 4.7-kilohm potent...

Circuit diagram: 17 watt Power Audio Amplifier Datasheet for AN7163: Download

Description  To celebrate the hundredth design posted to this website, and to fulfil the requests of many correspondents wanting an amplifier more powerful than the 25W MosFet, a 60 - 90W High Quality power amplifier design is presented here. Circuit topology is about the same of the above mentioned amplifier, but the extremely rugged IRFP240 and IRFP9240 MosFet devices are used as the output pair, and well renowned high voltage Motorola's transistors are employed in the preceding stages. The supply rails voltage was kept prudentially at the rather low value of + and - 40V. For those wishing to experiment, the supply rails voltage could be raised to + and - 50V maximum, allowing the amplifier to approach the 100W into 8 Ohm target: enjoy! A matching, discrete components, Modular Preamplifier design is available here: Modular Audio Preamplifier. Amplifier section: Parts:  R1______________47K 1/4W Resistor R2_______________4K7 1/4W Resistor R3______________22K 1/4W Resistor R4__...