Low Voltage Preamplifier
This is a special low voltage version of my audio preamp. T1`s emitter voltage is biased close to half supply voltage (1.5V) to allow for maximum output voltage...
Vinyl Pre-Amplifier
Many designers opinionate that NFB loop controlled amplifiers are inferior because they degrade the sound, and yet I wonder what it is that these individuals th...
Dynamic Microphone Preamp
This is a 3 stage discrete amplifier with gain control. Alternative transistors such as BC109C, BC548, BC549, BC549C may be used with little change in performan...
Hi-Fi Preamplifier
This circuit was submitted by Graham Maynard from Newtownabbey, Northern Ireland. It has an exceptionally good high frequency response, as demonstrated by apply...
CMoy Pocket Amplifier
Chu Moy designed a very popular headphone amplifier that`s easy to build, and it can be built small enough to fit in a pocket, power supply and all. It`s powerf...
18W Audio Amplifier
Can be directly connected to CD players, tuners and tape recorders....
Tube power amplifier 5W with EL84
This is an image Schematic. No Description available....
Power Amplifier 45W with HEXFET
A ideal solution for the make a good, low cost power amplifier. Its a ideal solution for the creation a system of home cinema. The preamplifier and the driver s...
Headphone Amplifier
An amplifier to drive low to medium impedance headphones built using discrete components. Both halves of the circuit are identical. Both inputs have a dc path t...
Power amplifier 65W with HEXFET
A medium power amplifier that is characterized by a lot of good sound quality, but simultaneously is very simple in the construction. Him uses, enough time in...
Power Amplifier 50W
This simple audio power amplifier was originally designed for a circuit board workshop, conducted by the OSU IEEE Student Group. At the workshop, 20 participant...
Power amplifier 60W Class A
The simplified circuit [Fig.2] shows that each sub-amplifier consists of two voltage gain stages. The first stage consists of a complementary two stage common ...
Superamp
This amplifier is the monophonic 270 watt Double barreled Amplifier. For the original article, I specified plus and minus 85 V dc power supply voltages. The vol...
Bridged Amplifier 15W/4
Description is not in English language....
Power amplifier 60W/8
This circuit was designed and manufactured the `80`s. From then it works without problem. It does not present any particular constructional problem, beyond know...
Headphone amplifier with TDA2004
A opamp. medium power, here its used as amplifier of headphones with possibility drive low loads. It contains in a nutshell two amplifiers. The voltage gain, ha...
300W Subwoofer Power Amplifier
High power amps are not too common as projects, since they are by their nature normally difficult to build, and are expensive. A small error during assembly me...
2a3 Tube Amplifier
Two circuits of audio tubes amplifiers....
Vox AC 50/4 Amplifier
This is an simple Vox AC amplifier. The circuit is not very clear but is readable....
60 Watt Into 8 Ohms Power Amplifier
This amplifier does not claim to be "state of the art", and in fact the base design is now over 20 years old. It is a simple amp to build, uses commonly availab...