Why no Pre-amplifier forum?

panson_hk · 9th March 2007, 12:42 AM

I wonder why a forum dedicated for pre-amplifier is not available. Most amplifier design books are 100 % for power amp. Is it because an active pre-amp no longer necessary? Line out from digital source is high enough to drive power amp directly with a passive pre-amp (volume control).

sam9 · 9th March 2007, 01:16 AM

They are already covered under either Solid State or Tubes. Your choice.

destroyer X · 9th March 2007, 01:20 AM

as you already have concluded.

Almost everything you have, as audio sources, have something near 1 Volt of audio output...so...they match almost all power amplifiers...the need of pre amplifier is reduced to old turntables and the need to adjust bass and treble...and also this need is reducing as some people avoid to use, prefering to listen a flat system.

Other reasons may come.. will be interesting to read other guy's ideas about it.

In my personal use.... to compare amplifiers...to construct and compare them.... i have never used pré amplifiers, reason why i do not see interest on them...i think that each audio stage removed the better will be the sound... this is what i think about.

But i know a lot of people that use pré amplifiers and they explain that need in many different ways.

regards,

Carlos

unclejed613 · 9th March 2007, 05:55 AM

actually there are many uses for preamps. switching between multiple sources, supplying gain and equalization for phono inputs, volume control, tone control (if that's what you want, mono/stereo switching. preamps also extend cable life, go ahead, try plugging and unplug cables every time you want to listen to a different source (with what some spend on cables per year one could pay for several preamps).
also there's tape loops for tape decks and other recording media. with modern preamp technology, distortion and noise really isn't a problem.

XEAGLEKEEPER · 9th March 2007, 05:20 PM

As per Unclejed,with addition to running multiple amplifiers

9th March 2007, 12:42 AM	#1
panson_hk diyAudio Member Join Date: Aug 2005 Blog Entries: 10	Why no Pre-amplifier forum? I wonder why a forum dedicated for pre-amplifier is not available. Most amplifier design books are 100 % for power amp. Is it because an active pre-amp no longer necessary? Line out from digital source is high enough to drive power amp directly with a passive pre-amp (volume control).

9th March 2007, 01:20 AM	#3
destroyer X diyAudio Member Join Date: Feb 2004 Location: Recife - Brasil Northeast	Maybe because our audio sources are already pré amplified as you already have concluded. Almost everything you have, as audio sources, have something near 1 Volt of audio output...so...they match almost all power amplifiers...the need of pre amplifier is reduced to old turntables and the need to adjust bass and treble...and also this need is reducing as some people avoid to use, prefering to listen a flat system. Other reasons may come.. will be interesting to read other guy's ideas about it. In my personal use.... to compare amplifiers...to construct and compare them.... i have never used pré amplifiers, reason why i do not see interest on them...i think that each audio stage removed the better will be the sound... this is what i think about. But i know a lot of people that use pré amplifiers and they explain that need in many different ways. regards, Carlos

9th March 2007, 05:55 AM	#4
unclejed613 diyAudio Member Join Date: Dec 2006	actually there are many uses for preamps. switching between multiple sources, supplying gain and equalization for phono inputs, volume control, tone control (if that's what you want, mono/stereo switching. preamps also extend cable life, go ahead, try plugging and unplug cables every time you want to listen to a different source (with what some spend on cables per year one could pay for several preamps). also there's tape loops for tape decks and other recording media. with modern preamp technology, distortion and noise really isn't a problem. __________________ Vintage Audio and Pro-Audio repair ampz(removethis)@sohonet.net spammer trap: spammers must die

9th March 2007, 05:20 PM	#5
XEAGLEKEEPER diyAudio Member Join Date: Jan 2006 Location: central Iowa	As per Unclejed,with addition to running multiple amplifiers __________________ Ret. USAF... AKA- Avionic * Solder slinger for hire...*

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9th March 2007, 01:16 AM	#2
sam9 diyAudio Member Join Date: Jun 2002 Location: Left Coast	They are already covered under either Solid State or Tubes. Your choice.

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