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Audio Schematics - Power Amplifier Circuits

1.5kW Power Amplifier - Just the thing for those for whom no amount of power is enough

100 Watt RMS Amplifier - This is a100-Watt basic power amp that was designed to be (relatively) easy to build at a reasonable cost. It has better performance (read: musical quality) than  standard STK module amps that are used in practically every mass market

100W Guitar Amplifier Mk II - The original of the unit above. Retained for posterity, and has speaker box details

11 Watt Audio Amplifier - A 10-W Design giving subjectively better results than class B transistor amplifiers.

11 Watt Power Amplifier - Simple Class A Amplifiers

15dB UHF TV Antenna Booster - This is an UHF band TV antenna preamplifier circuit With 15dB gain to build easily. It is formed based on BF180 UHF Transistor. The first stage is an band pass filter constructed by the C1, CV1, L1, L4, C7 and C3, the second stage is a base-common

16 Watt Amplifier - this circuit provides 16 watts of amplification. it is built using two LM383 power audio amplifiers. use suitable heat sinks with the ic's.

18 Watt Audio Amplifier - Can be directly connected to CD players, tuners and tape recorders. Do not exceed 23 + 23V supply. Q3 and Q4 must be mounted on heatsink. D1 must be in thermal contact with Q1. Quiescent current (best measured with an Avo-meter in series with Q3 Emitter) is not..

2 Watt 2.3 GHz RF Amplifier using a MRF2001

2 Watt Amplifier (red circuits) - This amplifier was designed to be self-contained in a small loudspeaker box. It can be feed by Walkman, Mini-Disc, iPod and CD players, computers and similar devices fitted with line or headphone output. Of course, in most cases you will have to make two boxes to obtain stereo.

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

20 Watt Audio Amplifier (Aaron Cake) - Simple stereo amplifier based on TDA1554..

20 Watt Class a Power Amplifier

20 Watt GaAs-FET Power on 2.3 GHz

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

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

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

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…

20W Amplifier (Aaron Cake) - 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..

22 Watt Stereo 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.

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…

25 Watt MosFet Audio Amplifier - High Quality simple unit. No need for a Preamplifier

2W Amplifier -  Amplifier operates in Class AB mode;  single 470R preset resistor controls  quiescent current flowing through  BD139/140 complimentary output transistors. Adjustment here, is a trade-off between low distortion and low quiescent current.
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