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Audio Line Driver – Circuit Schematic
Audio Line Driver
This preamplifier has a low output impedance, and is designed to drive long cables, allowing you to listen to a remote music source without having to buy expens...
RIAA Phono Preamp – Circuit Schematic
RIAA Phono Preamp
This riaa Pre-Amp is the perfect solution to getting a signal off of your old turntable and into your mixing board. Whether you want to grab a couple of loops f...
Simple High Quality Preamp For Hi-Fi – Circuit Schematic
Simple High Quality Preamp For Hi-Fi
For those who are still with me, the preamp featured has optional tone and balance controls which may be omitted if desired (although I do not recommend this ge...
Phono Preamplifier – Circuit Schematic
Phono Preamplifier
In recent years, following CD`s introduction, vinyl recordings are almost disappeared. Nevertheless, a phone preamplifier is still useful for listening old viny...
Audio preamplifier circuits – Circuit Schematic
Audio preamplifier circuits
The circuit is so simple that there is little to say about it, but it gives very good results. Tr1 is operated in grounded base mode with input to its emitter t...
Parametric MID Frequence EQ – Circuit Schematic
Parametric MID Frequence EQ
The circuit constitutes a natural extension of Mic-Line balance unit, but can be adapted to any other audio circuit. It is made up of two units in the series : ...
10 Band Graphic Equalizer – Circuit Schematic
10 Band Graphic Equalizer
The circuit of graphic equalizer, allocates ten adjusting potesometer , that each one from them affects in a predetermined area of frequencies, the central freq...
Audio Graphic Equaliser – Circuit Schematic
Audio Graphic Equaliser
Audio graphic equalizers are very common as commercial products (for Hi-fi, car audio and stage use) but circuits for them are very rarely published. I didn`t d...
Better Volume (and Balance) Controls – Circuit Schematic
Better Volume (and Balance) Controls
The volume control in a hi-fi amp or preamp (or any other audio device, for that matter), is a truly simple concept, right? Wrong. In order to get a smooth incr...
5 band graphic equalizer using a single IC/chip – Circuit Schematic
5 band graphic equalizer using a single IC/chip
This circuit uses a single chip, IC BA3812L for realizing a 5 band graphic equalizer for use in hi-fi audio systems.The BA3812L is a five-point graphic equalize...
Graphic Equaliser 527 – Circuit Schematic
Graphic Equaliser 527
This is an image Schematic. No Description available....
Graphic Equaliser 533 – Circuit Schematic
Graphic Equaliser 533
This is an image Schematic. No Description available....
Graphic Equaliser 545 – Circuit Schematic
Graphic Equaliser 545
This is an image Schematic. No Description available....
Graphic Equaliser 537 – Circuit Schematic
Graphic Equaliser 537
This is an image Schematic. No Description available....
(Expandable) Graphic Equaliser – Circuit Schematic
(Expandable) Graphic Equaliser
This equaliser is designed as a preamp suitable for musical instruments - guitar, bass and keyboard in particular. Unlike most conventional graphic equalisers, ...
6-Band Graphic Equalizer – Circuit Schematic
6-Band Graphic Equalizer
The EQ-2 it is a circuit of graphic equalizer 6 band of regulation. Each band is regulated from the potesometers RV1-6, that are, for better optical indicate of...
3 Band Equalizer – Circuit Schematic
3 Band Equalizer
A classic circuit of regulation of tone of three way, with which we can regulate low, mid and high frequencies, of acoustic signal. The boost/cut can be regulat...
10 Band Graphic Equalizer – Circuit Schematic
10 Band Graphic Equalizer
With graphic equalizer we make selective cutting off or boost, of selected departments of acoustic spectrum. With this way we can adapt the musical reproduction...
Graphic Equalizer – Circuit Schematic
Graphic Equalizer
This is an image Schematic. No Description available....
5 Band Graphic Equalizer – Circuit Schematic
5 Band Graphic Equalizer
Another one unit of graphic EQ. five bands. The basic difference with the other circuits is, that I use instead of IC, transistor and the power supply, go up in...