For people who really understand the difference between sound quality, a preamp will be a valuable asset, but less knowledgeable people need to learn more about the preamp and how to use it.
Why do you need a preamplifier
The most common case when a preamplifier is really needed is when the signal coming from microphones, pickups, receivers, or turntables is not powerful enough and needs to be amplified to a line level and then processed. It should be borne in mind that it should be located close to the signal source to minimize electromagnetic interference to other technical installations and reduce the useful signal.
The role of the preamp
A modern preamp gives the usual sound quality a brighter coloration in which tones become distinguishable. It eliminates room resonance, noise, and other distortion from the system. It also reveals the nuances of the sound that were lost during compression.
Such devices are mainly installed in professional recording studios, karaoke, etc. The wonderful effect that the stereo amplifiers guarantee opens up the compressed format and allows you to enjoy the art to the fullest, especially if they have power preamplifiers.
Preamplifiers are of various classes: A; D; B and AB are the most optimal, belonging to the middle class.
Class A preamplifiers operate without signal clipping in the most linear section of the current-voltage characteristic of the amplifying elements.
The advantage of the class B preamplifier can be considered high efficiency, which theoretically can reach 78%. The power consumption of the amplifier is proportional to the output power, and in the absence of a signal at the input, it is generally zero.
And what do we get in the end? The sound preamplifier can liberate the listener and provide him with incomparable sound quality instead of flat and colorless sound. This device produces expressive, detailed, rich, and dynamic sound.