Preamplifier, also known as preamp, is essentially a device that connects and amplifies the audio signal from varied audio/visual source components. This can include CDs, DVDs, or Blu-ray Disc players. Today stereo pre amplifier are especially pretty popular. The preamplifier can be used to switch between multiple sources, process audio or video, as well as supply an audio output signal to what is referred to as a power amplifier. When it comes to a preamplifier-to-power amplifier configuration, the preamp effectively takes care of the signal processing and input sources. The power amplifier is an important component that supplies the power and signal needed for the loudspeaker in order to produce sound.
Preamplifiers can serve multiple roles in an audio system. They can firstly boost signals from the source equipment, like a turntable or digital audio player, to a level that your power amplifier can work with effectively. They can also provide a way to switch between different source components. They may even provide a means to adjust the volume of the audio signal.
The role of preamplifiers can vary in distinctive audio sources. For instance:
Turntables: Phonograph signals are generally very weak. They tend to require a more specialized preamplifier like a phono preamplifier. Such device helps boost signals, as well as can apply correct equalization curve to match the recording characteristics.
Microphones: In case of professional audio systems, microphones are often use send their signals to a dedicated microphone preamp that is generally built into audio interfaces or standalone rack units.
Digital Audio Players: Even though majority of the modern audio players have built-in preamps, a number of high-end models usually allow for an external preamp, that helps ensure greater control and flexibility over the audio signal.
Preamplifiers come in a number of forms, each having unique features and specifications. Here are some common types:
Tube Preamps: Also known for their warm, smooth sound, tube preamps makes use of vacuum tubes to amplify the signal. They are often favored by audiophiles for their unique sonic characteristics.
Transistor Preamps: These are the most common types of preamps. They tend to use semiconductors instead of tubes. These preamps are very durable, dependable and need much less maintenance in comparison to tube preamps.
FET Preamps: Field-effect transistor (FET) preamps are known for their impedance characteristics and are able to emulate the warmth of tube preamp to a good extent.
Each type of stereo preamp tends to serve a specific purpose, and brings its distinctive features on the table, based on the type of components used in their design and construction. More details on preamps, Germany made audiophile speakers and more can be found online.