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To increase the signal-to-noise ratio of an audio signal prior to input into the main amplifier.
The SNR is generally increased using a differential amplifier. Oftentimes this is unnecessary, and the purpose of the preamplifier is to increase the signal voltage prior to amplifying the current in the power amplifier stage.
What else can I help you with?
What is the function of an amplifier in electronic communications?
An amplifier is used to increase the strength of the signal.
Do you need a Amplifier for 6x9 speakers?
You need an amplifier for any speakers if they are to function.
How will you locate the fault in pre amplifier?
it is simply the voltage of the system
What are Pre-Amp outputs?
They are RCA type connectors on the back of your Head Unit (Radio). There are 2 connections, usually blue and white, the cord for this has the same connectors on both ends. The Pre-Amp outputs are a direct line for the Signal from your Head Unit to go directly to an Amplifier (you will see similar connections on your Amplifier as you see on the back of your Head Unit), so when you run speaker wire from your Amplifier, the speakers will play the sound (Music) your Head Unit is producing no matter if its from the CD or FM/AM tuner or AUX input like from an I-Pod.Another AnswerA pre-amplifier, which is also known as a 'control unit', a high-fidelity unit which is separate from, but which must be used together with, a 'power amplifier'.Pre-amplifier/power amplifier units are normally regarded as 'high end' equipment and tend to be very expensive. The pre-amplifier unit is equipped with inputs for phono, CD-player, tuner, and various other auxiliary units and (usually) provides a single pair (right- and left-channels) audio outputs for connection to the power amplifier. The pre-amplifier is the unit which provides the volume control, tone controls, filters, etc., while the power amplifier simply amplifies the output from the pre-amplifier unit. The output usually takes the form of a pair of RCA connectors, usually colour coded white and red.Some 'home theatre' amplifiers provide a 'pre-amplifier' output, which bypasses its internal power amplifier, for the purpose of adding external power amplifiers, if desired.
What is the function of an amplifier in an electrical curcuit?
It essentially boosts the voltage across the amplifier, and through the circuit.
What is the function of if amplifier in radar receiver?
hahahhahahahaha
How do you Derive the Instrumentation Amplifier Transfer Function?
Here is qn excellent article that explains step by step: http://MasteringElectronicsDesign.com/how-to-derive-the-instrumentation-amplifier-transfer-function/
what is the Primary function of the common collector amplifier?
current gain
Can you put a microphone directly into a monitor?
You can, but it will not sound loudly. A microphone always needs a pre amplifier.
What is the function of a buffer amplifier in electronics?
A buffer amplifier can be used to transform high input impedence to low output impedence, or vice-versa.
What is a pre out amp jack used for?
A pre out amp jack is used to connect an external amplifier to a preamplifier or receiver. This enables you to use additional amplification for more power and better sound quality in your audio system.
What is the main function of the power supply to a certain amplifier?
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