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Showing posts with the label Auto Subwoofer

Car subwoofer filter circuit

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 linear POT.C5 and…

Auto Amplifier Wiring Diagram

In whis circuit is designed a simple connection between audio componets.


Subwoofer Amplifier Circuit 30W

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 Partlist: R1 = 100K
R2 = 1R
C1 = 2.2uF
C2 = 100uF
C3 = 47uF
C4 = 100nF
C5 = 10uF
C6 = 47uF
C7 = 100uF
IC = SI1020GL , SI1030G

250 W Stereo Audio Amplifier Class-T

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 SystemsCircuit Amplifier:

50 Watt Subwoofer Amplifier

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

60W Subwoofer Amplifier Circuit

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 Resistor R…

Car Subwoofer

Subwoofer Amplifier 100W

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.

Multipower BCD technologyVery high operating voltage range (±50 V)DMOS power stageHigh output power (100 W into 8 Ω THD =10%, with VS = ±40 V)Muting and stand-by functionsNo switch on/off noiseVery low distortionVery low noiseShort-circuit protected (with no input signal applied)Thermal shutdownClip detectorModul…

LM3886 Audio Power Amplifier High-Performance 68W Audio Power Amplifier

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%.

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.

Subwoofer filter LM 741

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 filter is now set at 240 Hz. , the supply…

Subwoofer Amplifier 40W

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:

Part-list: R1-R3, R7 = 100 K?R6 = 8,2 kWR4, R5, R8, R9 = 1.40 Ω 1%R10 = 1 ΩC1 = 470 nFC2 = 10 V μF/63C3 = 4.7 V μF/63C4, C5, C7 = 220 nFC6 = 2200 V μF/50C8 = 1000 V μF/50D1, D2 = 1N4001T1 = BD712 or BD912T2 = BD711 or BD911IC1 = TDA2030ALS = speaker - 4/8 ΩCooling = Fisher SK08/75

Power Amplifier 300W

POWER OUTPUT:200W rms/8 ohm 310W rms/4 ohm800W 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= 1Kohm 5WR34-35= 0.1ohm 5WC14-17= 100uF 100VR2-3= 4.7KohmR36-43= 39ohmC15= 100nF 250V polyesterR4-5= 22ohmR37-42= 5.6Kohm 1WQ1-2-3BC547R6-14= 10KohmR38-41= 220ohm 5WQ4-5-6= BC557R7-8= 1KohmR39-40= 0.1ohm 5WQ7-11-12= BD140 or BC640R9-23*=10K ohmR44-45= 0.1ohm 5WQ8= BC549R10= 10ohm *see circuit sch.R46= 4.7ohm 2WQ9-10-15= BD139 or BC639R11-13= 2.2KohmR47= 100ohmQ13-14= MJ15004R12= 22KohmC1= 2.2uF 25VQ16-17= MJ15003R15-16= 22ohmC2-6= 330pF ceramicTR1= 2K2 TrimmerR17-18=  4.7KohmC3-8= 100uF 100VF1-2= 5A Fuse FastR20-25= 390ohmC4-9= 100nF 250VD1-3= 5.1V 0.5W ZenerR21= 6.8KohmC5= 100nF 100V polyesterD2= 62V/5W Zener or 47v and 15V in seriesR22=  4.7KohmC7= 100uF 25VD4-5= 1N4004R24-26-33= 220ohmC10= 1.5nF 100V polyesterL1=10 turns diameter 1mm in 15mm diameter tubeR27-32= 100o…

Subwoofer amplifier TDA7293


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)


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 …

200W Power Amplifier

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 Amplifier LM386

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 capacitively coupli…

200W Subwoofer Amplifier Circuit

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
200W Mosfet Amplifier LAyout PCB
Regulator Circuit Diagram MOSFET AMPLIFIER Regulator PCB MOSFET amplifier