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Showing posts with the label 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…

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 amplifie…

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

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 operationMinimum external partsWide supply voltage range: 4V–12V or 5V–18VLow quiescent current drain: 4mAVoltage gains from 20 to 200Ground referenced inputSelf-centering output quiescent voltageLow distortion: 0.2% (AV = 20, VS = 6V, RL = 8Ω, PO =125mW, f = 1kHz)n Available in 8 pin MSOP package
LM386N circuit diagram: LM386N layout: LM386N pin layout:


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

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 Vsupply voltage VCC (DC): 25 VOperating supply voltage VCC (opr): 18 VOutput current (peak): 9 APower dissipation PD: 50 WOperating temperature: 30~85 °CStorage temperature: 55~150 °C TA8210AH circuit diagram:

TA8210AH layout:

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:

70W x 1ch BTL Power Amplifier

Circuit diagram for AN17850A:

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:

1000W Audio Power Amplifier for Subwoofers


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 …

Tone Control Subwoofer Low Pass Filter IC

CMOS Technology2 - Channel Input3 - 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 ComponentsAdjustment of Frequency response by changing the value of the external componentSingle Power Supply: 3 to 8.5 VoltsAvailable in 20 pins, DIP or SO PackageMulti-Media 3D Satellite Speaker and Subwoofer SystemCar AudioAudio EquipmentSound CardOther Electrical Audio Equipment

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…

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…

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

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


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: