Showing posts with label Subwoofer circuit. Show all posts
Showing posts with label Subwoofer circuit. Show all posts


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.

  • 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



100W Subwoofer Amplifier

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Features for 100W Subwoofer Amplifier:
  • Output power (f=1 KHz, d=0.5 %): 100 W in 8 ohm
  • Supply voltage: ................ СЃ 40 V
  • Quiescent current: ............. 50 mA
  • Maximum current: ............... 2.6 A
  • Sensitivity: . 600 mV
  • Frequency response: ............ 10-35000 Hz (-1 dB)
  • Distortion HD: ................. 0.01 %
  • Intermodulation dist.: ......... 0.02 %
  • Signal/noise: 83 dBConstruction

Circuit diagram for 100W Subwoofer Amplifier:

100W Subwoofer Amplifier
more info to orifinal article sourse



200W Audio Amplifier

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General Description:

This complete high quality, low noise mono audio power amplifier is based around the Hybrid Integrated Circuit STK4050 manufactured by Sanyo. The circuit incorporates volume and has a maximum music output power of 200W.The circuit incorporates an on board power supply; therefore, only centre tapped transformer is required to power the circuit. I t has very good quality sound. U can use it with your Home Theatre your PC & etc... You can also use it as Subwoofer Amplifier. It is a compact package for THIN-TYPE Audio sets. Easy Heatsink design to disperse heat generated in THIN-TYPE audio sets. Constant-Current circuit to Reduce supply switch-ON and switch-OFF shock noise. External supply switch-On and switch-OFF shock noise muting, Load short-circuit protection, thermal shutdown and other circuits can be tailored-designed.


  • Output Power : 200Watts
  • Load Resistance : 8ohms
  • Input impedance : 55K
  • Maximum supply voltage : (+95v)-0-(-95v)
  • Recommended supply voltage : (+66v)-0-(-66v)

Circuit Diagram:

200 W Audio Amplifier



140 watt subwoofer circuit diagram

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140 watt subwoofer circuit diagram

140 watt subwoofer circuit diagram


100 watt subwoofer for home circuit diagram

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Circuit Diagram



1000W Power Amplifier

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Circuit Description 1000W Power Amplifier:

Power amplifier has up to 1000 Watt power, this circuit made one channel only so if you want to create a stereo in it must be made one again, actually this is more suitable power amplifier in use for Sound System or outdoor, so if only in use for the house I think is less suitable.
Maybe you've seen or even have an active speaker and there is written 1500 watts PMPO (Peak Music Power Output), make no mistake this is different from Power Amplifier Active Speaker, I often dismantle such Active Speaker in it only a power with power no more than 150 watts by using the transformer 2-3 Ampere. PMPO is not a real power which is issued by the Power Amplifier, but counting all the speakers that there is, for example: if there are 5 pieces of speakers on each channel and each speaker has a power of 10 W then it is 100 W PMPO.

Circuit Diagram 1000W Power Amplifier:

1000W Power Amplifier

Partlist 1000W Power Amplifier:

While this 1000 Watt Power Amplifier minimal use transformer 20 Ampere. And the output of PowerAmplifier DC voltage contains approximately 63 volts, with currents and voltages of this magnitude, this 1000 Watt Power Amplifier will not hesitate hesitate to destroy your woofer speakers to connect. To overcome that then before the speaker on connects to 1000 Watt Power Amplifier must be in pairsSpeaker Protector.
Actually if you want to create a Power Amplifier with great power does not have to make a PowerAmplifier with great power. Example: you want to create a Power Amplifier with 10 000 Watt power. You do not have to assemble a Power Amplifier with power of 10,000 watts, but you assemble thepower Power Amplifier Small but many, such as you assemble the Power Amplifier with 1000 Watts of power for as many as 10 pieces, it will produce 10 000 Watt Power Amplifier helpless.
Circuit uses power transistors pair of 5 x 5 x 2SA1216 and 2SC2922 and 2SC1583 use a differentialamplifier that actually contains 2 pieces of transistors that are in containers together. Why use such built-in amplifier differental tujuanya so identical / similar, could have uses 2 separate transistors but can result in amplifier so it is not symmetrical.
Tips combining speaker.

To get the speakers with great power combining techniques can be used in parallel series, combining each group of speakers should sepaker they will have the same impedance, the same type (Woofer, Mid Range or tweeter) and the same power. Number of merging these speakers should consists of 4 , 9, 16 ff, see picture
Example: The number of speakers have 4 pieces each of its 200 Watt power generated will be aspeaker at = 200 x 4 = 800 Watt. If there are 9 speakers 200 W then the result = 9 x 200 W = 1800Watt.

200 Watt Stereo Car Amplifier


Circuit Description

IC TA8210AH By using this you can apply a series of audio power amplifier is the car audio system. In general, all the speakers in the car using a subwoofer speaker, and woofer. Because the car is not big room so the sound is being required is not too high. Audio amplifier circuit can work at a minimum voltage 12-volt DC, if supplied under voltage 12-voltamplifier work will be less than the maximum. This amplifier output power up to 200W or 2 x 100W stereo with 8 ohm impedance.

Circuit Diagram

200 Watt Stereo Car Amplifier

Part List :

R1 =1K
R2 =50K trim
R3 =1K
R4 =50K trim
R5 =680R
R6 =680R
R7 =150K
R8 =2R2
R9 =2R2


C1 =1uF
C2 =1uF
C3 =47uF
C4 =47uF
C5 =100n/400V
C6 =220uF
C7 =220uF
C8 =100n/400V
C9 =100n/400V

Intregated Circuit



X2-3=in R
X2-1=in L
X1-1,X1-2=Out R
X1-3,X1-4=Out L

Subwoofer power amplifier IC OPA541BM

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Circuit Diagram

Subwoofer power amplifier IC OPA541BM

Amplifier Description


Subwoofer power amplifier circuit based on IC OPA541BM very suitable for use in subwoofer speakers, these amplifiers possess excellence in sound issued because the sound is very clear and issued in accordance with subwoofer speakers in a low tone.



14 Watt car audio amplifier circuit

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Basic operation of this amplifier is on IC TEA2021 ,

In this circuit minimum require voltage is 4 volts and maximum voltage 25 volts. Power output 14 Watt with 4 Ohm impedance. See this schematic.

PreAmp Subwoofer


Acoustic spectrum is extended by the 20Hz frequency is very low and reaches as high frequency 20000Hz. In the low frequency is lowered sense of direction. This reasoning leads us to attribute to the speaker's use of very low frequency. Making it to you we propose to distinguish these frequencies, in order for him to lead us on a suitable amplifier. Acoustic filter are met at different points in the sound system. Applications knownest they are filter baxandal to organize low-and high-frequency tones and crossover filter where the acoustics are separated in the subareas, for it leads to the appropriate speakers. Applications that you can we propose is a simple filter that limits the acoustic region (20-20000Hz) in 20-100Hz region. With manufacturing, we propose that you can you can make an active filter for you lead a very low frequency loudspeaker. With this you will put a big one between speaker HIFI speakers from you. In order for you to have a complete picture of sound you will need also an appropriate amplifier. In the entry of circuit you will connect the two roads out of the preamplifier or the exit of the preamplifier few. The series production in order to allocate out of the facility led a series of subwoofer power. If for some reason you do not have space for you to put the third speaker in the courtroom, then you can choose a smaller speaker. This output will depend on the type of music that you hear. If in deed you have the space, then after you create a filter and still say thank you, you can he recommend your friends or still makes each other to your friends.

Circuit diagram

Filter | PreAmp Subwoofer circuit diagram


R1 = 39 Kohm
R2 = 39 Kohm
R3 = 47 Kohm
R4 = 10 Ohm
R5 = 22 Kohm
R6 = 4.7 Kohm
R7 = 22 Kohm
R8 = 4.7 Kohm
R9 = 10 Ohm
R10 = 220 Ohm
C1 = 39 pF
C2 = 0.1 UF
C3 = 0.1 UF
C4 = 0.2 UF
C5 = 0.4 UF
C6 = 0.1 UF
C7 = 0.1 UF
IC1 = TL064

In the form that appears theoretical filter circuit. At first glance we see three different circuits which are mainly produced by two rounds of operational amplifiers. This circuit is a mixture, with the assistance variable amplifier and variable filters. Late-making requires a series of operations catering catering with the same trend with  ± 12. operational amplifier which is the active element for this circuit is the type of dual operation as a TL082 and NE5532. The operational amplifier is included in a family is equipped with field-effect transistor IFET in their entries. Each member is allocated a family in bipolar transistor circuits and field effect. This circuit can function in a high inclination, because of their high propensity to use transistors. Also they have the high honor rhythm elevation (slew rate), low polarization at this time for entry and little influenced by temperature. The operational amplifierhas an area of ​​3MHz unity gain bandwidth. Another important element for them is a great choice reject noise, there are currently in the line of catering.

Price refused to greater than 80dB, their consumption is small, from 11 to 3 mA. They briefly sold internally with eight pins and allocate two operational amplifiers, In the same row 14 pin in short they combine four operations, the trade them for sale with code TL074, TL084 and TL064, a nutshell with eight pins they sold the operational amplifier TL071 TL061 kajTL081 . In manufacturing we use the TL082 that has two operational. First operation of TL082 he worked as an amplifier and mixed with two channels, the entry is negative, it is a little mixed with the two resistances. A potentiometer on the steps of determining the aid circuit. At this point the left wing and right-channel preamplifier they added means of two resistances. En operational continuity with the help strengthen the signal is made depending on the price that has been potentiometer.
PCB layout 

Place runner comparable with the assistance of the circuit. The second operational amplifier is a filter manufacturing. Filters from the acoustic frequency from second grade and he made a round of operational amplifiers. This filter section with variable frequency low-cut. This frequency can be changed and took the price of very low frequency of 30Hz or still exceeds 150Hz. The frequency of the filter depends on the price cuts that have circuit elements. Change the value of the elements that we can have a frequency cut 150Iz, 130Hz, 100Hz, 7A? Z, 6A? Z even 3A? Z, is the price that they can be achieved by simple rotation of the double potentiometer. Filter circuit has been made about an operation 'that has completed a TL082 dual operational amplifier. In the filter out we will connect the plug load which is connected amplifier. In a series of exit are presented, which are limited as to the extent of frequency, the signal applied in the entry of the circuit.

TDA7294 150 W Power Amplifier

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Description of bridge TDA7294:

This is power amplifier based on IC TDA7294 with output power 150W with 8 ohm impedance, source voltage + - 25V. for circuit see image below.
Circuit diagram for TDA7294:
TDA7294 150 W Power Amplifier


200W power amplifier complete power supply

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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


Subwoofer Low Pass filter Circuit

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This is the simplest Subwoofer Low Pass filter Circuit using uA741 single op amp ic. The circuit is very low cost with respect to their work. The cut off frequency of this circuit is 25Hz to 80Hz maximum. Using this circuit , you can easily design a 2.1 Sub-woofer Speaker System at your own Home. The circuit contains very few components.In Pakistan, the cost of this circuit with PCB is Rs:45 The same circuit is working in my own hand made sub-woofer system. 
Subwoofer Low Pass filter Circuit

Parts List:

R1,R3,R4 = 10K 1/4W
R2=100K 1/4W
CY1,CY2 = 0.22uF Polyester
C1,C2 = 10uF/25V Electrolytic
IC1 = uA741A Single Op-Amp Ic + 8 Pin Ic Socket
3 Pin Male & Female Connector x 2
2 Pin Male & Female Connector x 1
PCB as in required size 4.5 cm x 3.4 cm


500W Subwoofer Amplifier Circuit

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500W Subwoofer Amplifier Circuit


Satellite + Subwoofer 3-Speaker System Electronics Crossover IC

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  • CMOS Technology 
  • Low Power Consumption 
  • 2 Built-in Individual Volume Control: 0 dB to -60dB 
  • 2-Channel 2nd Order High Pass Filter + 1 Mixed Mono Subwoofer Low Pass Filter 
  • Cross-Over Frequency adjustable by external passive components 
  • Control Interface of Volume Control: UP/DOWN Key (MCU is not necessary) 
  • Built-in 3D Effect and Loudness Function 
  • Supply Voltage: 5V to 9V
Satellite + Subwoofer 3-Speaker System Electronics Crossover IC


Tone Control Subwoofer Low Pass Filter IC

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  • 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 filter Circuit

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Circuit to solve new to the buffer input for the signal R + L and cutting area of ​​the Muting issue and the cut-off point often fear for VR 4 floor hard so I divided into 2 layers using 2 the time that the cut frequency, if wanted. It has layers of fine cut to the same location. I use ic tl072. And replace series capacitor 0.022 with 0.047 . That a soft voice that sounds good offline but not feeling heavy and dial around the back lot, try changing the capacitor. Beyond the traditional. Intended to adjust to extremely low frequency adjustment for the store before so I think that the device is used. Could differ. I sent in this condition before.


300W Subwoofer Amplifier

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150W Subwoofer

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It may seem a little excessive, but since I had the programmer, the C compiler and some spare PIC16F627 chips, this solution to handling power on mute, 12V trigger powering and LED for status would be small, reliable and cheap.

Three relays would be involved.
Mains switching relay, to switch in the 225VA toriodal transformer
Output switching relay, to disconnect the speaker from the amp
Input switching relay, to remove any input so the output switching relay switches a very small current, prolonging its life (thanks to Mark Hennessy for this idea).

Two LEDs would be on the front of the box. One LED for standby, one (blue) LED for power on. The would both flash in turn when the power on sequence runs.

Finally, there would be two inputs. One small push button for mounting on the front of the case for manual power on/off, and one 12V trigger input, isolated using a standard opto-isolator in order to prevent earth loops.

Thats all there is to it. Without the PCB mount transformer, the PCB turns out pretty small. It has been desgined to fit my relays (and other components) I had available to me, but is provided as a scan below if you want to use (and modify it in your subwoofer/power amplifier project. The C file, and HEX file for the PIC micro is also provided.

Origial Article sourse

50 Watt Subwoofer Amplifier

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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