22 Watt Car Subwoofer Amplifier

Circuit Description

     The stereo signals coming from the line outputs of the car radio amplifier are mixed at the input and, after the Level Control, the signal enters the buffer IC1A and can be phase reversed by means of SW1. This control can be useful to allow the subwoofer to be in phase with the loudspeakers of the existing car radio. Then, a 12dB/octave variable frequency Low Pass filter built around IC1B, Q1 and related components follows, allowing to adjust precisely the low pass frequency from 70 to 150Hz. Q2, R17 and C9 form a simple dc voltage stabilizer for the input and filter circuitry, useful to avoid positive rail interaction from the power amplifier to low level sections.

     This unit is intended to be connected to an existing car stereo amplifier, adding the often required extra "punch" to the music by driving a subwoofer. As very low frequencies are omnidirectional, a single amplifier is necessary to drive this dedicated loudspeaker. The power amplifier used is a good and cheap BTL (Bridge Tied Load) 13 pin IC made by Philips (now NXP Semiconductors) requiring a very low parts count and capable of delivering about 22W into a 4 Ohm load at the standard car battery voltage of 14.4V.

Circuit Diagram

Parts list:

• P1_____________10K Log Potentiometer
• P2_____________22K Dual gang Linear Potentiometer
• R1,R4___________1K 1/4W Resistors
• R2,R3,R5,R6____10K 1/4W Resistors
• R7,R8_________100K 1/4W Resistors
• R9,R10,R13_____47K 1/4W Resistors
• R11,R12________15K 1/4W Resistors
• R14,R15,R17____47K 1/4W Resistors
• R16_____________6K8 1/4W Resistor
• R18_____________1K5 1/4W Resistor
• C1,C2,C3,C6_____4µ7 25V Electrolytic Capacitors
• C4,C5__________68nF 63V Polyester Capacitors
• C7_____________33nF 63V Polyester Capacitor
• C8,C9_________220µF 25V Electrolytic Capacitors
• C10___________470nF 63V Polyester Capacitor
• C11___________100nF 63V Polyester Capacitor
• C12__________2200µF 25V Electrolytic Capacitor
• D1______________LED any color and type
• Q1,Q2_________BC547 45V 100mA NPN Transistors
• IC1___________TL072 Dual BIFET Op-Amp
• IC2_________TDA1516BQ 24W BTL Car Radio Power Amplifier IC
• SW1____________DPDT toggle or slide Switch
• SW2____________SPST toggle or slide Switch capable of withstanding a current of at least 3A
• J1,J2__________RCA audio input sockets
• SPKR___________4 Ohm Woofer or two 8 Ohm Woofers wired in parallel

Technical data:

• Output power (1KHz sinewave): 22W RMS into 4 Ohms at 14.4V supply
• Sensitivity: 250mV input for full output
• Frequency response: 20Hz to 70Hz -3dB with the cursor of P2 fully rotated towards R12, 20Hz to 150Hz -3dB with the cursor of P2 fully rotated towards R11
• Total harmonic distortion: 17W RMS: 0.5% 22W RMS: 10%

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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 C6 must be polyester capacitors.
• POT R13 can be used for adjusting the pass frequency.
• POT R7 can be used for adjusting the level.

Circuit diagram:

Car subwoofer filter

4558 ic subwoofer circuit

car subwoofer amplifier circuit diagram pdf

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la4440 subwoofer circuit

2.1 subwoofer circuit diagram

subwoofer amplifier circuit diagram download

5.1 subwoofer circuit diagram

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

  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

LM386N Audio Power Amplifer Amplifier 1x2W

LM386N general description:

The LM386 is a power amplifier designed for use in low voltage consumer applications. The gain is internally set to 20 to keep external part count low, but the addition of an external resistor and capacitor between pins 1 and 8 will increase the gain to any value up to 200. The inputs are ground referenced while the output is automatically biased 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. LM386N Audio Amplifier 1x2W

LM386N features:

• Battery operation
• Minimum external parts
• Wide supply voltage range: 4V–12V or 5V–18V
• Low quiescent current drain: 4mA
• Voltage gains from 20 to 200
• Ground referenced input
• Self-centering output quiescent voltage
• Low distortion: 0.2% (AV = 20, VS = 6V, RL = 8Ω, PO =
• 125mW, f = 1kHz)
• n Available in 8 pin MSOP package

LM386N circuit diagram:

LM386N Audio Amplifier 1x2W

LM386N layout:

LM386N pcb layout

LM386N pin layout:

LM386N pin layout:

Subwoofer

What is a subwoofer? Is a dedicated low-frequency speaker cabinet, usually self-amplified, that fills in

Subwoofer

the deep, rich bass that is missing from most main speakers. Subwoofers are specialized, and don't reproduce midrange or high frequencies. Most main speakers are passive (unamplified).  Subwoofers usually handle frequencies below 150 Hz or so. 

A quality subwoofer not only reproduces the thrilling deep bass notes with authority. Its presence in the system also allows the receiver / amplifier to reproduce mid-bass and mid-range notes more cleanly. All kinds of instruments, including voices, can be heard more clearly. Why should you add at least one great subwoofer to your system? 

1. Deep bass adds the emotion, the physical feeling of presence and excitement, to a good music or movie performance! One reason that inexpensive speakers sound "just OK" is that they cannot reproduce deep bass very well. 

2. Subwoofers help solve problems in speaker set-up and placement. It's difficult to set the main speakers where they are able to provide realistic imaging, and set them in the best place for bass.  In-wall and in-ceiling speakers can be placed where they work best cosmetically, without concern for their bass reproducing ability, when the system has at least one great subwoofer. 

3. High-quality subwoofers are engineered to generate the massive cone movement required by low bass reproduction. A good subwoofer is specifically designed to generate deep bass. Whether you like jazz, classical, pop or rock, a good system can be made better with a good subwoofer.

TA8210AH Audio Amplifier 2x22W

TA8210AH general description:

     It's amizing circuit work beautiful. Is desination for audio amplification, for car. This is a circuit of 2 x 22 watt BTL amplifier using IC TA8210AH. It is not only an auto amplifier, ideal for a low-frequency auditory approach those hi-fi, with a very good linear feature. Can be fueled by a 12 volt car battery but shi from a 12 volt charger. The chip incorporates four bridge amplifiers available in two by two in order to ensure the output 22 watts per channel on 4 ohms. TA8210AH Audio Amplifier 2x22W

TA8210AH features:

• Peak supply voltage (0.2s): 50 V
• supply voltage VCC (DC): 25 V
• Operating supply voltage VCC (opr): 18 V
• Output current (peak): 9 A
• Power dissipation PD: 50 W
• Operating temperature: 30~85 °C
• Storage temperature: 55~150 °C

TA8210AH circuit diagram:

TA8210AH Audio Amplifier 2x22W

TA8210AH layout:

Layout TA8210AH Audio Amplifier 2x22W

PCB TA8210AH Audio Amplifier 2x22W

18W+18W Stereo Amplifier

General Description:

The TDA7265SA is class AB Dual Audio Power amplifier assembled in the @ Clipwatt 11 package, specially designed for high quality sound application as Hi-Fi music centers and stereo TV sets. The TDA7265SA is pin to pin compatible with TDA7269, TDA7269A, TDA7269SA, TDA7265,TDA7499, TDA7499SA. 

Circiut Diagram:

18W+18W Stereo Amplifier

70W x 1ch BTL Power Amplifier

Circuit diagram for AN17850A:

70W x 1ch BTL Power Amplifier

250 W Stereo Audio Amplifier Class-T

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

1000W Audio Power Amplifier for Subwoofers

Description

The IRS20124 is a high voltage, high speed power MOSFET driver with internal deadtime and shutdown functions specially designed for Class D audio amplifier applications. The internal dead time generation block provides accurate gate switch timing and enables tight deadtime settings for better THD performances. In order to maximize other audio performance characteristics, all switching times are designed for immunity from external disturbances such as VCC perturbation and incoming switching noise on the DT pin. Logic inputs are compatible with LSTTL output or standard CMOS down to 3.0 V without speed degradation. The output drivers feature high current buffers capable of sourcing 1.0 A and sinking 1.2 A. Internal delays are optimized to achieve minimal deadtime variations. Proprietary HVIC and latch immune CMOS technologies guarantee operation down to Vs= –4 V, providing outstanding capabilities of latch and surge immunities with rugged monolithic construction.

Features:

• 200 V high voltage ratings deliver up to 1000 W output power in Class D audio amplifier applications
• Integrated deadtime generation and bi-directional over-current sensing simplify design
• Programmable compensated preset deadtime for improved THD performances over temperature
• High noise immunity
• Shutdown function protects devices from overload conditions
• Operates up to 1 MHz
• 3.3 V/5 V logic compatible input

Typical Application Diagram:

Warning! This is a Typical circuit diagram:1000W Audio Power Amplifier for Subwoofers

Datasheet for IRS20124: Download

Tone Control Subwoofer Low Pass Filter IC

• CMOS Technology
• 2 - Channel Input
• 3 - Channel Output (Including 1 stereo Output and Subwoofer Output)
• Low Total Harmonic Distortion (THD<0.01%, Subwoofer THD<0.2%)
• High S/N Ratio (S/N Ratio <-87dB, A-weighting)
• Least External Components
• Adjustment of Frequency response by changing the value of the external component
• Single Power Supply: 3 to 8.5 Volts
• Available in 20 pins, DIP or SO Package
• Multi-Media 3D Satellite Speaker and Subwoofer System
• Car Audio
• Audio Equipment
• Sound Card
• Other Electrical Audio Equipment

Tone Control Subwoofer Low Pass Filter IC

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.

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)

Circuit diagram

32W Subwoofer Amplifier

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.

Subwoofer Amplifier Circuit 60W

Using the STK4038X audio amplifier IC, can be designed a very simple high power and efficiency audio power amplifier . This circuit is manufactured by Sanyo Corporation and will provide a output power of 60 watts on a 8 ohms load or 4 ohms load with 0.008% distortion . The output power that is provided by this audio IC , can be more higher , but with more distortion.If you will use a 8 ohms load you must power this audio amplifier project from a dual +/- 40 volts DC power supply and if you’ll use a 4 ohms load you must power this audio project form a dual +/- 33.5 volts DC power source. To prevent over heating the STK4038X audio power IC must be heatsinked on a good heatsink . Also you must use a very well filtered power supply ( a 10000uF capacitor will be fine for this audio project) .

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 voltage must be symmetrical, + and - 12-15 V. A suitable diet is the Symmetric mini power supply . If you would like a better sound would have you two 741's replaced by an NE5532. The picture for the layout to be printed at 150DPI (= + / - 33x33mm).

Circuit Diagram:

subwoofer filter lm741 circuit diagram

Part-list:

• R1, R2 = 47 k
• R3, R4 = 4.7 K?
• R5, R6 = 100 Ω
• P1 = 47 k logarithmically
• C1-C3 = 100 nF
• IC1, IC2 = LM 741

Layout and PCB:

Subwoofer filter LM741 layout and pcb

Datasheet for LM741 and NE5532:
LM741 Operational Amplifier - Download
NE5532 Operational Amplifier - Download

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:

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 Amplifier 300W

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= 1Kohm 5W	R34-35= 0.1ohm 5W	C14-17= 100uF 100V
R2-3= 4.7Kohm	R36-43= 39ohm	C15= 100nF 250V polyester
R4-5= 22ohm	R37-42= 5.6Kohm 1W	Q1-2-3= BC547
R6-14= 10Kohm	R38-41= 220ohm 5W	Q4-5-6= BC557
R7-8= 1Kohm	R39-40= 0.1ohm 5W	Q7-11-12= BD140 or BC640
R9-23*=10K ohm	R44-45= 0.1ohm 5W	Q8= BC549
R10= 10ohm *see circuit sch.	R46= 4.7ohm 2W	Q9-10-15= BD139 or BC639
R11-13= 2.2Kohm	R47= 100ohm	Q13-14= MJ15004
R12= 22Kohm	C1= 2.2uF 25V	Q16-17= MJ15003
R15-16= 22ohm	C2-6= 330pF ceramic	TR1= 2K2 Trimmer
R17-18=  4.7Kohm	C3-8= 100uF 100V	F1-2= 5A Fuse Fast
R20-25= 390ohm	C4-9= 100nF 250V	D1-3= 5.1V 0.5W Zener
R21= 6.8Kohm	C5= 100nF 100V polyester	D2= 62V/5W Zener or 47v and 15V in series
R22=  4.7Kohm	C7= 100uF 25V	D4-5= 1N4004
R24-26-33= 220ohm	C10= 1.5nF 100V polyester	L1=10 turns diameter 1mm in 15mm diameter tube
R27-32= 100ohm 1W	C11-12= 1.5nF 100V polyester
R28,29,30,31= 100ohm	C13-16= 100nF 250V polyester	*Use R23=6k8 for 4 ohm loudspeakers

Subwoofer Amplifier

The fins were added to a simple flat aluminium panel, and are made from 20 x 20 x 3mm aluminium angle. Their purpose is threefold - they improve the performance of the plate as a heatsink (although this is not necessary with the BP4078 PWM amp), they make the panel a lot more rigid, and provide essential protection for the volume control and phase switch. It also looks better IMO - it looks like it means business, rather than looking like one of those wimpy 50W plate amps you see advertised.

Complite, original article sourse and right reserverd here

Subwoofer amplifier TDA7293

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 power can  be delivered to very low impedance loads, so optimizing the thermal dissipation of the system.

Circuit Diagram

Audio amplifier circuit TDA7293

Layout

Layout for audio circuit TDA7293

 PCB

PCB for audio circuit TDA7293

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: