What does a Preamp do? (Sorry for the noob question)

[maxngck]

Hi all,

 

Please pardon me for such a noob question. Can please let me know what does a preamp do? what is the function?

 

Thanks! :-[

[petetherock]

From wiki (try searching, it helps) - couldn't have put it better:

http://en.wikipedia.org/wiki/Preamp

 

In general, the function of a preamp is to amplify a low level signal (possibly at high impedance) to line-level. A list of common sources would include a pickup, microphone, turntable or other transducer. Equalization and tone control may also be applied.

 

In a home audio system, the term 'preamplifier' may sometimes be used to describe equipment which merely switches between different line level sources and applies a volume control, so that no actual amplification may be involved. In an audio system the second amplifier is typically a power amplifier (power amp). The preamplifier provides voltage gain (about: 10millivolts to 1volt) but no significant current gain. The power amplifier provides the higher current necessary to drive loudspeakers.

 

Preamplifiers may be:

 

incorporated into the housing or chassis of the amplifier they feed

in a separate housing

mounted in other pieces of equipment, such as turntables, microphones and electric basses.

close to the signal source, remote from the next amplifier -- eg: beside hi-fi system, then feeding into a computer in the home office.

[hifiluv]

we usually start with integrated amp (solid state or tube or hybrid) and then if when u got more $ and then want to try a "higher level" sound, then go for -

 

preamp + power amp

preamp + mono blocks (indv amp for each channel)

 

:)