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In Reply to: RE: Pre-Amp - rookie question posted by pistonengine08 on August 05, 2016 at 05:17:39
Interesting. Thanks all. My pre/pro goes from -50db to +15db (or was it +20?). It really doesn't make sense to me to have a stage to attenuate the signal before amplification - unless I start thinking about what it would take to build a system that had no attenuation from source to speaker. Definitely not practical
I suppose in theory you'd want to build out a system where, if you took the quietest source you listen to at the maximum level you want to listen at, the amp and preamp are maxed without distortion. All other source levels and volumes would be handles by volume attenuation?
Definitely seems impractical - so I guess a big amp section and large attenuation for volume control makes sense to be able to use the equipment in a wide range of configurations and sources.
Follow Ups:
In nearly any separates with a preamp and an amp.. THE CD player signal at 2 volts is far higher than most amps could possibly use.
IMO ALL preamps playing music from a standard CD player are attenuating the signal.
Well, maybe not if you like playing at 110dB...
Try connecting your CD player direct to your amp.. But remember you ARE likely to blow up you speakers or amp doing it.. from too much signal.
Wayyy back before CD.. ALL signal devices were standard at 0.5 volts..
THen CD came along and for some crazy stupid reason raised CD output signal to 2 volts..
NO preamp or amp makers ever actually adjusted for this.
(I have no idea why not) But it is true. ALL the companies I know of, preamps and amp combos all have way more amplification than they need. And all attenuate the signal from digital sources to amp.
SOME old source devices having the earlier 0.5 volt standard will not.
I think I'll pass on blowing up my gear, thanks!
Ravel's "Bolero" starts very quiet and builds slow and steady over several minutes until it reaches full volume.If you can play the song all the way through without it getting too loud then you might need a preamp with gain.
If it gets louder than you would ever normally listen to your system before the end and you have to push stop, then you don't need a preamp with gain.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Edits: 08/06/16
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