Electric Guitar Amplifiers

The electric guitar amplifier (usually called "electric guitar amp") is an electrical device used to restore the sound of an electric electric guitar plugged it. It has a circuit comprising an amplifier (to increase the volume) and a speaker to emit sound (known as combo).
Summary

The electric guitar amp is used not only to amplify the sounds of an electric electric guitar, but also the color, that is to say precisely alter their harmonics. This alteration is done by:

* Equalization: usually three bands: low (150-200Hz) / Medium (1-1.2 kHz), Treble (4-5kHz).
* Distortion (drive or gain) can saturate the preamplifier stage.
* Outline: active filter that is typically increase the bass and treble while digging mediums, when turned to left. The opposite effect occurs when turned right.
* Control: is done either by transistors (neutral color or cold) or tubes (Warm color and more musical).
* The reflection: it is often done through a "line in late spring" and gives the impression that it plays a part more or less.
* Volume / Master: Sets the signal output without generating saturation (unlike the drive / gain).
* The Speaker: The speaker is involved in the coloration of the sound. Therefore, when music only a electric guitar, the signal does not come from the output line from the amp. The signal is transplanted through a suitable microphone, placed in different ways to the speaker, to have the required sound.

The electric guitar amps also have one or more outputs for connecting to auxiliary effects (mainly in the form of pedals).

For your information, there are several power amplifier transistor (RMS)

* <20W: You can play alone.
* 40/50: lets play group for rehearsals.
* 80/100W: Allows you to play on small stages live, that is to say that the sound is not transplanted by a microphone (eg bars)
* 400W: Allows you to play on stages bigger line (eg 200).
*> 400W sound professional, usually managed by an engineer. The sound of the amp is taken up by a microphone, and in this case placing it more or less opposite the loudspeaker is very important to ensure a uniform sound.

The first amplifiers were tube (also called "tube"), the first electronic element (historically) for amplifying an electrical signal. One day the transistor emerged: smaller, less power-hungry, more reliable, with an amplification constant (linear), irrespective of the intensity of the input signal and finally a very low cost. However, its linearity gives his cold little melody.
tube

The tube technology (including the grid) is sensitive to vibrations lead mechanical reverb and a warm color and "singing". The tubes have a better impedance and store more energy, they saturate "smooth" and can withstand peak intensities easier (better dynamic impulse). These properties make for an equivalent transistor amplifier "classic" will be roughly two times more powerful than its "equivalent" tube.

The three main drawbacks of the tube are its fragility (shocks), its wear and its high cost.

It enjoys a certain cultural prestige, its sound is considered more "friendly" than a transistor amp, which explains that the vast majority of electric guitarists generally much prefer a tube amp, like many passionate hi-fi. [ref. needed] This impression of heat is due to harmonic pairs generated by the lamps (transistors generating odd harmonics less pleasing to the human ear).

For professionals and stars of the electric guitar, and despite the rigors of the road, the amplification tube remains the essential standard.