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Audio Circuits:  Power Amplifiers
Audio Power Amplifiers:   #      A-D        E-O         P-S        T-Z


Last Updated on: Tuesday, August 18, 2015 06:51 AM

Audio Circuits -- Main Page


Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

2 Watt Amplifier -  A 2 Watt audio Amplifier made from discrete components.  This was one of the earliest circuits that I ever designed and built, in Spring 1982. At that time I had only an analogue meter and a calculator to work with. Although not perfect, this Amplifier does have a wide frequency response, low harmonic distortion about 3%,… [Design by Andy Collison]

 

2 Watt Amplifier -  An audio Amplifier made from discrete components with 2 Watts audio power into an 8 ohm load. Carlos has used this Amplifier on his AM radio for many years.… [by Carlos Feldman]

 

2.3 GHz Power Amplifiers -  Note: quality of  text is poor.…

 

2×100W Power Amplifier with STK4231II -  Here the high power audio amplifier dual output at 100W max each output channel. Great output power with only using single chip.… [Designer's name not included]

 

2×25W Stereo Power Amplifier with STK4141II -  Here the stereo power amplifier based on single IC STK4141II. This Amplifier circuit will deliver 25W on each output channel.… [Designer's name not included]

 

2×30W Audio Amplifier with STK465 -  Simple circuit with higher power output, this Amplifier circuit is very easy to build. Just look at the PCB layout of this circuit.he active component required is just the main power Amplifier chip STK465.… [Designer's name not included]

 

20 Watt Amplifier using LA4440 -  This is the circuit diagram of a simple 19 watt amplifier using IC LA4440 from Sanyo.It uses very less components other than the IC LA4440.A very high quality circuit with respect to its cost and ideal for beginners.… [Designer's name not included]

 

20 Watt Audio Amplifier -  Simple stereo Amplifier based on TDA1554… [Circuit designed by Aaron Cake]

 

20 Watt Audio Power Amplifier using TDA2005M -  This IC chip was designed specifically for use in power boosting applications in automobiles. It is self protecting against short circuits and thermal problems. In the bridge configuration shown it will deliver 20 watts of power into a 2 ohm speaker operating at 14.4 volts.… [Randy Linscott]

 

20 Watt Class a Power Amplifier -  A single-ended Class-A Amplifier is essentially one where there is only one active driven output device. The passive "load" may be a resistor, an inductor (or transformer) or - as in this Amplifier - a current sink. Of the three basic options, the current sink offers the highest linearity for the lowest cost, so is the ideal choice.  Some esoteric (some might say idiosyncratic) designs use inductors or 1:1 transformers, but these are bulky and very expensive. Unless made to the utmost standards of construction, they will invariably have a negative effect on the sound quality, since the losses are frequency dependent and non-linear. … [Rod Elliott - ESP ]

 

20 Watt GaAs-FET Power on 2.3 GHz -  …

 

20 Watt Stereo Amplifier -  This circuit is very basic to build and puts out great power for your car or home. Keep all leads as short as possible… [Randy Linscott]

 

20 Watt/ Channel Stereo Power Amplifier -  Based on the versatile LM1875 from National Semiconductor…

 

20 Watt/Channel Stereo Power Amplifier -  Based on the versatile LM1875 from National Semiconductor…

 

200 Watt Amplifier -  Circuit only, no description given… [Designer's name not given]

 

200W ATX PC Power Supply -  This power supply has ATX design and 200W performance. I was drawed diagram, when I repaired this power supply.This power supply circuit uses chip TL494. Similar circuit is used in the most power supplies with output power about 200W…

 

200W Audio Amplifier -  Project available from Kemo Kits… [by IQ Technologies Industry, unless otherwise noted online]

 

20dB VHF Amplifier -  The Amplifier is a circuit of high frequency RF with distinguishable materials. The amplifier as circuit strengthens the tendency of signal with concrete aid, depending on the frequency of signal. If the frequency of signal is included in the limits of spectrum of frequencies.… [by IQ Technologies Industry, unless otherwise noted online]

 

20W Amplifier -  The 22 watt Amp is easy to build, and very inexpensive. The circuit can be used as a booster in a car audio system, an Amp for satellite speakers in a surround sound or home theater system, or as an Amp for computer speakers… [Circuit designed by Aaron Cake]

 

20W Audio Amplifier -  This schematic is designed to operate with minimum of external components. This Amplifier offers high quality performance at very low distortion. Project is based on National LM1875 IC. The IC is thermal and short circuit protected.… Designer is Rajkumar Sharma]

 

20W Audio Amplifier using LM1875 -  20W Audio Amplifier kit is based on LM1875 IC… [by Rajkumar Sharma]

 

22 Watt Audio Amplifier using TDA1554 two channel Audio Amp chip -  The 22 watt Amp is easy to build, and very inexpensive. The circuit can be used as a booster in a car audio system, an Amp for satellite speakers in a surround sound or home theater system, or as an Amp for computer speakers… [Circuit designed by Aaron Cake]

 

22 Watt Stereo Amplifier -  This circuit is very basic to build and puts out great power for your car or home. Keep all leads as short as possible.… [Circuit designed by Randy Linscott]

 

22W Audio Amplifier -  The 22 watt Amp is easy to build, and very inexpensive. The circuit can be used as a booster in a car audio system, an Amp for satellite speakers in a surround sound or home theater system, or as an Amp for computer speakers. The circuit is quite compact and uses only about 60 watts… [Circuit designed by Aaron Cake]

 

22W Stereo Amplifier -  This circuit is very basic to build and puts out great power for your car or home. Keep all leads as short as possible. … [Designed by Randy Linscott]

 

23 dB Bipolar DDS Amplifier -  Some recent discussions with George Heron, N2APB and Craig Johnson, AA0ZZ regarding alternatives to using MMICs as Amplifiers in DDS applications lead to the design of this 23 dB shunt feedback Amplifier. This version is setup to operate at 12-13.8 volts, but with minor changes, can be made to operate with supply voltages as low as 5 volts.… [Designed by Jim Kortge, K8IQY]

 

25 Watt MosFet Audio Amplifier -  High Quality simple unit. No need for a Preamplifier… [Flavio Dellepiane's web site]

 

2A3 Push-Pull Class A Stereo Amp -  The input stage is comprised of a both halves of a 6SL7 octal dual hi-mu triode in a differential Amp configuration with a 1ma constant current cathode load. I'm using field-effect (constant-current) diodes for simplicity. the diff Amp approach was chosen for good power supply rejection, ease of balancing, good gain, and ease of application of *feedback*, if desired (hey, i like to keep an open mind). It also takes care of phase-splitting right up front.
Note: I've returned the constant current diode cathode to -9V instead of ground in order to avoid the non-linearities about the pinch-off region (Vpo ~= 1.5V) … [Bob Danielak's website]

 

2W / 4W Audio Amplifier using pair of LA4100, LA4101 or LA4102 modules -  Schematic only, no circuit description provided]… [designer not identified]


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