AmplifierCircuits

Circuit description: Here is the circuit diagram of a simple subwoofer filter that can be operated from a 12V DC supply. Such a circuit is very useful in automobile subwoofer applications. The circuit is nothing but a low pass filter whose pass frequency can be adjusted between 60 to 160 Hz. The circuit is designed around the TL072 dual BIFET opamp IC. Out of the two opamps inside the chip, IC1A is wired as a buffer. The left and right audio inputs after mixing is fed to the input of the IC1A using the DPDT switch S1. Switch S1 is the phase control switch which can be used to make the subwoofer in phase with other speakers. When S1 is in position 2, 180 degree phase shift will be induced.POT R7 can be used for controlling the level. IC1B forms the low pass filter whose pass frequency can be controlled by adjusting the dual gang POT R13. Circuit Features: The circuit can be powered from 12V DC. IC1 must be mounted on a holder. S1 is a DPDT switch. R13 should be a dual gang l...

In whis circuit is designed a simple connection between audio componets. Auto Amplifier Wiring Diagram from crutchfield.com

 Subwoofer Amplifier Circuit 30W  description:      This circuit with 30w output Power circuit. This Amplifier circuit is very suitable for use in subwoofer amplifier system based on IC SI1030G. Amplifier has 30W output with 8 ohm impedance. Supply voltage required minimum of 12 volts and a maximum of up to 22 volts DC.  Subwoofer Amplifier Circuit 30W  Circuit diagram:  Subwoofer Amplifier Circuit 30W   Subwoofer Amplifier Circuit 30W  Partlist: R1 = 100K R2 = 1R C1 = 2.2uF C2 = 100uF C3 = 47uF C4 = 100nF C5 = 10uF C6 = 47uF C7 = 100uF IC = SI1020GL , SI1030G

GENERAL DESCRIPTION: The TA0103A is a 250W continuous average (4Ω ), two channel Amplifier Driver Module which uses Tripath’s proprietary Digital Power Processing (DPPT M ) technology. Class-T amplifiers offer bot h the audio fidelity of Class-AB and the power efficiency of Class-D amplifiers.  Applications: Audio/Video  Amplifiers/Receivers  Pro-audio Amplifiers  Automobile Power Amplifiers  Subwoofer Amplifiers  Home/PC Speaker Systems Circuit Amplifier: 250 W Stereo Audio Amplifier Class-T

R1  200 Ohm 1/4 W Resistor R2  200K 1/4 W Resistor R3  30K 1/4 W Resistor R5  1K 1/4 W Resistor R6  5K 1/4 W Resistor R7,R10  Meg (5%) 1/2 W Resistor R8,R9  0.4 Ohm 5 W Resistor R11  10K Pot R12,R13  51K 1/4 W Resistor R14  47K 1/4 W Resistor C1  100uF 35V Electrolytic Capacitor C2  0.011uF Capacitor C3  3750pF Capacitor C4,C6  1000pF Capacitor C5,C7,C8  0.001uF Capacitor C9  50pF Capacitor C10  0.3uF Capacitor C11,C12  10,000uF 50V Electrolytic Capacitor U1,U2  741 Op Amp U3  ICL8063 Audio Amp Transister Driver thingy Q1  2N3055 NPN Power Transistor Q2  2N3791 PNP Power Transistor BR1  250 V 6 Amp Bridge Rectifier T1  50V Center Tapped 5 Amp Transformer S1  SPST 3 Amp Switch S2  DPDT Switch F1  2 Amp Fuse SPKR1  8 Ohm 50W Speaker MISC  Case, Knobs, Line Cord, Binding Posts Or Phono Plugs (For Input And Output), Heatsinks For Q1 And Q2

The output power: 40 w 8 ohm and 60 w 4 ohm load. Preamplifier is used in the same 60 v rails as the power amplifier gain blocks can implement two transistors can provide about 20 v RMS output. This provides a very high input overload. List at least the recommended value is C8. 3300μf capacitor or two 2200μf capacitors connected in parallel would be a better choice. Darlington transistor types of alternative has MJ11014 (Q3) and MJ11013 (Q4) or TIP142 (Q3) and TIP147 (Q4). T1 transformer can be also a 24 24 v or 25 25 v type (ie. 48 v or 50 v center tapped). SW1 switch insert low-cut feature when open. In all cases, Darlington transistors are used as the output device is essential that the transistor (Q2) pass in close thermal contact with the sensor output transistors as possible. R1__________________6K8 1W Resistor R2,R4_____________470R 1/4W Resistors R3__________________2K 1/2W Trimmer Cermet R5,R6_______________4K7 1/2W Resistors R7________________220R 1/2W Res...

General Description The TDA7293 is a monolithic integrated circuit in Multiwatt15 package, intended for use as audio class AB amplifier in Hi-Fi field applications, such as home stereo, self powered loudspeakers and Topclass TV. Thanks to the wide voltage range and to the high output current capability it is able to supply the highest power into both 4-Ω and 8-Ω loads.The built-in muting function with turn-on delay simplifies the remote operation avoiding on-off switching noises. Parallel mode is possible by connecting several devices and using pin11. High output power can be delivered to very low impedance loads, so   optimizing the thermal dissipation of the system. Features: Multipower BCD technology Very high operating voltage range (±50 V) DMOS power stage High output power (100 W into 8 Ω  THD =10%, with VS = ±40 V) Muting and stand-by functions No switch on/off noise Very low distortion Very low noise Short-circuit protected (w...

The LM3886 is a high-performance audio power amplifier capable of delivering 68W of continuous average power to a 4Ω load and 38W into 8Ω with 0.1% THD+N from 20Hz–20kHz. The performance of the LM3886, utilizing its Self Peak In-stantaneous Temperature (˚Ke) (SPiKe™) protection cir-cuitry, puts it in a class above discrete and hybrid amplifiers by providing an inherently, dynamically protected Safe Op-erating Area (SOA). SPiKe protection means that these parts are completely safeguarded at the output against overvoltage, undervoltage, overloads, including shorts to the supplies, thermal runaway, and instantaneous temperature peaks. The LM3886 maintains an excellent signal-to-noise ratio of greater than 92dB with a typical low noise floor of 2.0µV. Itexhibits extremely low THD+N values of 0.03% at the rated output into the rated load over the audio spectrum, and provides excellent linearity with an IMD (SMPTE) typical rating of 0.004%.

Circuit diagram for 32W subwoofer amplifier 1- Operational amplifier TDA2050 which is used in the main amplifier circuit 2- TDA1524 which is used in the pre-amplifier of the circuit. 3- I used the split DC power ±22V as an external supply. The main advantage of the split supply over the single supply is that it is filtered from both sides (+) and (-) terminals and has the proper grounding system which are caused to decrease the output noise of amplifier but u can use single supply too.

Description for  Subwoofer filter LM 741 :      If you like I want some more bass in your stereo, you can switch a subwoofer there. This is a speaker that only reflects the bass. Below is a circuit to ensure that the subwoofer gets really only the bass.  This circuit is used between the signal source (mixer, CD player) and the amplifier. It is an active filter, better than passive filters which are generally mounted behind the amplifier. The circuit is mono because the bass for both channels are equal. The human ear can not yet determine the direction of this bass.  The first 741 is used as a mixer amplifier. The gain is adjustable with P1. Then, the signal is applied to a second of the order Butterworth-filter. C A(C1 + C2) and C B (C3) can be calculate using the following formulas: where F k , the crossover frequency (the frequency at which filter stops the transmission of sound), pi = 3.1416, R = R3 = R4, F k in Hertz, and C. F. As shown, the filt...

Description This amplifier delivers massive power and uses one IC and two power transistors. The circuit consists of an amplifier IC (a TDA 2030A) and a power stage consists of two transistors.  Amplifier can be powered with an asymmetrical supply voltage of 12 to 44 V. Circuit Diagram: Subwoofer Amplifier 40W Part-list: R1-R3, R7 = 100 K? R6 = 8,2 kW R4, R5, R8, R9 = 1.40 Ω 1% R10 = 1 Ω C1 = 470 nF C2 = 10 V μF/63 C3 = 4.7 V μF/63 C4, C5, C7 = 220 nF C6 = 2200 V μF/50 C8 = 1000 V μF/50 D1, D2 = 1N4001 T1 = BD712 or BD912 T2 = BD711 or BD911 IC1 = TDA2030A LS = speaker - 4/8 Ω Cooling = Fisher SK08/75

POWER OUTPUT: 200W rms/8 ohm  310W rms/4 ohm 800W rms/8 ohm (Bridge mode) FREQUENCE RESPONSE  20HZ-20KHZ +/-0.5dB  INPUT SENSITIVITY  1V for 200W/300W  HUM AND NOISE  -105dB  THD  <0.1%  DAMPING FACTOR  65 Part list: R1-19 = 1K ohm  5W R34-35= 0.1 ohm  5W C14-17= 100uF 100V R2-3= 4.7K ohm R36-43= 39 ohm C15= 100nF 250V polyester R4-5= 22 ohm R37-42= 5.6K ohm  1W Q1-2-3 =  BC547 R6-14= 10K ohm R38-41= 220 ohm  5W Q4-5-6=  BC557 R7-8= 1K ohm R39-40= 0.1 ohm  5W Q7-11-12=  BD140  or  BC640 R9-23*=10K  ohm R44-45= 0.1 ohm  5W Q8=  BC549 R10= 10 ohm  *see circuit sch. R46= 4.7 ohm  2W Q9-10-15=  BD139  or  BC639 R11-13= 2.2K ohm R47= 100 ohm Q13-14=  MJ15004 R12= 22K ohm C1 = 2.2uF 25V Q16-17=  MJ15003 R15-16= 22 ohm C2-6= 330pF ceramic TR1 = 2K2 Trimmer R17-18=  4...

Features Multipower BCD technology Very high operating voltage range (±50 V) DMOS power stage High output power (100 W into 8 Ω THD =10%, with VS = ±40 V) Muting and stand-by functions No switch on/off noise Very low distortion Very low noise Short-circuit protected (with no input signal applied) Thermal shutdown Clip detector Modularity (several devices can easily be connected in parallel to drive very low impedances) Description The TDA7293 is a monolithic integrated circuit in Multiwatt15 package, intended for use as audio class AB amplifier in Hi-Fi field applications, such as home stereo, self powered loudspeakers and Topclass TV. Thanks to the wide voltage range and to the high output current capability it is able to supply the highest power into both 4-Ω and 8-Ω loads. The built-in muting function with turn-on delay  simplifies the remote operation avoiding on-off switching noises. Parallel mode is possible by connecting several  devices and using pin11. High output p...

This 200W power amplifier circuit using IC STK 4050.  STK 4050 is a power amplifier module is very powerful, because the IC is already a module then only needed a little extra components to build a reliable 200W Power Amplifier. Here is a picture series of Power Amplifier ICs 200W use STK 4050 complete with its power supply:

Audio Amplifiers with LM386 The LM386 is a versatile, small power amplifier designed for use in low voltage consumer applications. The gain is internally set to 20 to keep external part count low, but with the addition of an external resistor and capacitor between pins 1-8 the gain can be set to any value from 20 to 200. The inputs are ground referenced and the output automatically biases to one-half the supply voltage. The quiescent power drain is only 24 milliwatts when operating from a 6 Volt supply, making the LM386 ideal for battery operation. To make the LM 386 a more versatile amplifier, 2 pins (pin 1 and 8) are provided for gain control. With pins 1 and 8 open the internal 1.35k resistor sets the gain at 20 (26 dB). If a capacitor is placed between pin 1-8, bypassing the built-in 1.35k resistor, the gain will go up to 200. If a resistor is placed in series with the capacitor, the gain can be set to any value from 20 to 200. Gain control can also be done by capaci...

Circuit Description Here is a circuit that uses a mosfet amplifier amplicable for subwoofer as the main booster, or the basis of this boosterAmplifier. Circuit which uses MOSFET Power Amplifier is powered by the output more than 200W Speaker 8 Ohm impedance. We also include a suitable power supply circuit with the use of MOSFETamplifier with 200W of power, not only of his course Schematic diagram for the layout design is also already there. Amplifier Circuit Diagram Amplifier Circuit Diagram 200W Mosfet Amplifier LAyout PCB 200W Mosfet Amplifier LAyout PCB Regulator Circuit Diagram MOSFET AMPLIFIER Regulator Circuit Diagram MOSFET AMPLIFIER Regulator PCB MOSFET amplifier Regulator PCB MOSFET amplifier