873
FREE
circuits!

Audio preamplifier circuit diagrams

pages:
Speaker Microphone Circuit
Speaker Microphone Circuit
November 30, 2010

This circuit takes an ordinary loudspeaker and allows it to be used in reverse, as a microphone. [more]

Electronic Stethoscope
Electronic Stethoscope
November 16, 2010

Stethoscopes are not only useful for doctors, but home mechanics, exterminators, spying and any number of other uses. Standard stethoscopes provide no amplification which limits their use. This circuit uses op-amps to greatly amplify a... [more]

Phono Preamplifier
Phono Preamplifier
October 16, 2010

In recent years, following CD's introduction, vinyl recordings are almost disappeared. Nevertheless, a phono preamplifier is still useful for listening old vinyl discs from a well preserved collection. [more]

Portable Microphone Preamplifier
Portable Microphone Preamplifier
October 15, 2010

This circuit is mainly intended to provide common home stereo amplifiers with a microphone input. The battery supply is a good compromise: in this manner the input circuit is free from mains low frequency hum... [more]

Modular Preamplifier Switching Center
Modular Preamplifier Switching Center
September 26, 2010

This module can be a necessary addition to the Modular Preamplifier Control Center when more than two sources need to be connected to the preamplifier chain. Four high level inputs can be selected by means... [more]


circuit from:http://www.extremecircuits.net/2010/03/four-high-level-inputs-double-bar.html

Phono Preamplifier
Phono Preamplifier
September 26, 2010

In recent years, following CD's introduction, vinyl recordings are almost disappeared. Nevertheless, a phono preamplifier is still useful for listening old vinyl discs from a well preserved collection. This simple but efficient circuit devised for... [more]


circuit from:http://www.extremecircuits.net/2009/07/phono-preamplifier.html

Stereo Preamplifier With Bass Boost
Stereo Preamplifier With Bass Boost
September 26, 2010

This preamplifier was designed to cope with CD players, tuners, tape recorders etc., providing an ac voltage gain of 4, in order to drive less sensitive power amplifiers. As modern Hi-Fi home equipment is frequently... [more]


circuit from:http://www.extremecircuits.net/2009/07/stereo-preamplifier-with-bass-boost.html

Portable Microphone Preamplifier Circuit Schematic
Portable Microphone Preamplifier Circuit Schematic
September 26, 2010

This circuit is mainly intended to provide common home stereo amplifiers with a microphone input. The battery supply is a good compromise: in this manner the input circuit is free from mains low frequency hum... [more]


circuit from:http://www.extremecircuits.net/2009/12/portable-microphone-preamplifier.html

Moduler Preamplifier Circuit Diagram
Moduler Preamplifier Circuit Diagram
September 26, 2010

To complement the 60 Watt MosFet Audio Amplifier a High Quality Preamplifier design was necessary. A discrete components topology, using + and - 24V supply rails was chosen, keeping the transistor count to the minimum,... [more]


circuit from:http://www.extremecircuits.net/2010/01/moduler-preamplifier-circuit-diagram.html

Modular Class A Buffer preamplifier
Modular Class A Buffer preamplifier
August 8, 2010

A unit which is often very useful, if we need to isolate, in sound circuits, two stage between them. Then we can use this circuit which has an amplified unit, which gain X1, we do... [more]



pages: