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This circuit is of an 2x 2,500W RMS stereo amplifier, super-light and without switching-mode power supply. The circuit just shows a channel, and the power supply that it assists to the two channels. The audio circuit should be duplicated, but the power supply assists to the two channels without problems. A special care should be destined to the insulating transformer of the audio line, that should be of audio-high-quality, of the type used in microphone pre amps input line. The whole group (2 channels) of 5,000W RMS it should not weigh more than 32 lbs, already inside of an appropriate metallic box. Warning This circuit is exclusively for amateur use. It contains not-isolated parts of the electric AC net and it can be very dangerous. The connections for the speakers are not isolated of the domestic AC net and it requests extra care. This procedure seeks to substitute a conventional power supply with great weight and cost reduction, without necessarily to use a switching-mode power supp...

HA13150A is a four-channel BTL amplifier IC designed for car audio, featuring high output and low distortion, and applicable to digital audio equipment. It provides 21 W output per channel, with a 14.4V power supply and at 10% distortion. Circuit diagram: Circuit diagram for 21 W 4-Channel BTL Power IC Datasheet for HA13150A: Download

22 W audio amplifier Datasheet for ha13128: Download

This circuit use the IC AN7166  . On circuit have an advantage is very loud sound , although only 30W this circuit is like a 100 W transistor power amplifier. Its so good circuit with IC AN7166 . This circuit require minimum voltage 12 V and Maximum voltage 24 volt , I recomended voltage for this circuit is 18 volt. And use the battery supply current 5 Ampere. Maximum power output of one speaker 30 W with impedance 4 Ohm. See this circuit schematic below : Click image to view large Capacitor thats connect legs IC 4 and 3 is 1 nF . And capacitor thats connect legs IC 9 and 3 is 1 nF. For the input capacitor at 1 uF ( L and R ) for output capacitor at 1000uF with voltage 50 V or higher.

Here's a layout based on the Jordan Bosstone, with a few changes. I've built one of these now and they sound pretty good.

Minimum Voltage required for this circuit  8 volt and maximum voltage 28 volt . Its can use to amplifier on the electronic devices such us Radio , DVD , MP4 , MP5 , and etc. To amplify the signal sound to audio sound , Maximum output power 2 x 20 Watts with impedance 4 ohm. The circuit is stereo amplifier. You can use the circuit to car amplifier because support to subwoofer speaker. See schematic diagram below :

General Description: The TA8260AH is 4 ch BTL audio power amplifier for car audio  application.  This IC can generate more high power: POUT MAX = 40 W as it is  included the pure complementary PNP and NPN transistor  output stage.  It is designed low distortion ratio for 4 ch BTL audio power  amplifier, built-in Stand-by Function, Muting Function, Clip  detector, and diagnosis circuit.  Additionally, the AUX. amplifier is built-in, it can make the beep  signal etc. output to 2 channels (OUT1 and 4).  It contains various kind of protectors for car audio use.  Circuit Diagram:  40 W BTL x 4CH Audio Power IC  Datasheet for TDA8260AH:  Download

General Description: The CS44130 is a high-efficiency power stage for digital Class-D amplifiers designed to recieve PWM signals from a modulator such as the CS44800/600. The power stage outputs can be configured as four half-bridge channels, two half-bridge channels and one full-bridge channel, two full-bridge channels, or one parallel full-bridge channel. Features:  Configurable Outputs (10% THD+N) – 2 x 30 W into 8 Ω, Full-Bridge – 1 x 60 W into 4 Ω, Parallel Full-Bridge – 4 x 15 W into 4 Ω, Half-Bridge – 2 x 15 W into 4 Ω, Half-Bridge + 1 x 30 W  into 8 Ω, Full-Bridge  Space-Efficient, Thermally-Enhanced QFN  Package  PWM Popguard® Technology for Quiet Startup  > 100 dB Dynamic Range - System Level  < 0.12% THD+N @ 1 W - System Level  Built-In Protection with Error Reporting – Over-Current – Thermal Warning – Thermal Fault – Under-Voltage  Single (+10.8 V to +21 V) High Voltage Supply  High Efficiency (90%)  Low RDS(ON)  Low Quiescent Current  Lo...

DSP/ SPBANA/ HEADPHONE CIRCUIT DIAGRAM Click on the pictures to zoom in  Amplifier Circuit diagram VFD/ KEY/ LED CIRCUIT DIAGRAM  Syscon SMPS Voltage chart

This amplifier is designed to be as flexible as possible, with no bad habits. Indeed, it will operate stably with supply voltages as low as +/-5V (completely pointless, but interesting), all the way to the maximum supply voltage of +/-70V. The only change that is needed is to trim the MOSFET bias pot! With the full supply voltage of +/-70V (which must not be exceeded!), RMS power is around 180W into 8 ohms, or 250W into 4ohms. Short term (or "music") power is typically about 240W into 8 ohms and 380W into 4 ohms. Note that depends to a very great degree on the power supply, and a very robust supply is an absolute requirement for tThe maximum output. In general, unless you really need the maximum possible power, I suggest that you limit the supply voltage to ±56V using a 40+40V transformer. You will get around 150W into 8 ohms from this supply voltage (short-term), but you also relax the demands placed on the MOSFETs and heatsinks. It is worth noting that a MOSFET amp will alw...

Using only four transistors in the quasi-complementary amplifier configuration, this transistor power amplifier circuit can deliver 90W of power into 4 ohm loads and at low cost. As shown in the transistor power amplifier circuit there are no expensive components in this circuit, except the power transformers and speakers. As shown in the diagram there are no expensive components in this circuit, except the power transformers and speakers. Input stage is formed by this two current driver directly raised a pair of transistors of the output stage. Transistor level end (2N3055) mounted on a heat sink to keep the lifetime of these devices. Supported by one source (of 80Vcc) at the output of the final stage, before the speaker, a capacitor is placed to block DC current, and just skip the audio signal. The power supply circuit 90 W audio power amplifier must be sufficient to provide current 1.5A per channel audio. Thus the power required to operate the stereo 3A and 6A is required for the fo...