Overall noise, singnal to noise(db) & Distortion(%) obtain - diyAudio
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Old 11th December 2012, 11:27 PM   #1
diyAudio Member
Join Date: Dec 2012
Location: Somewhere on this Audio Planet
Default Overall noise, singnal to noise(db) & Distortion(%) obtain

At first I want to apologize for my weak English. maybe i can improve it with the help of you here! So please accept all warm greetings on behalf of me.

1 - How can obtain the "overall" distortion(%) , noise, and signal to noise(DB) ratio in some burst audio stages (with known values ​​of all these parameters for each stage)?
For example, for an integrated pre amplifier, tone control and power amplifier.
Please tell me if there is a good reference on the internet to answer this and so The formulas for computing..

2 - For a system includes the following stages:
*Power amplifier (<= 20 W r.m.s * 2)
*Tone Control (active, baxendall or equalizer..)
& *Pre amplifier :
To "further enhance" the quality and delightful sound of the system output,
Observation of which ratios between the following parameters is required:
- Voltage Gain of each stage and so the total
- Feedback on each stage and so the total
- Signal-to-noise ratio for each stage and the total
- Impedances between these stages
- "And all other items you proposed"

With the utmost respect
And ultimately thanks
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Old 12th December 2012, 09:57 AM   #2
AndrewT is offline AndrewT  Scotland
diyAudio Member
Join Date: Jul 2004
Location: Scottish Borders
Not sure what you need but go and read:
What is Gain Structure?
Audio Component Grounding and Interconnection - diyAudio
regards Andrew T.
Sent from my desktop computer using a keyboard
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Old 12th December 2012, 02:47 PM   #3
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Join Date: Dec 2012
Location: Somewhere on this Audio Planet
Dear Andrew T.
your help was very useful. the links are detailed and clear. now i can say at least most of my problems in Grounding & Gain Ratios are solved!
thank you andrew T.

But what about the noise and feedback optimum ratios along 3 stage amp. systems? (pre/active tone/power amp)

in compliance with what parameters such these, can be achieved either dreamy sound? and what are the basic rules to design and run a very warm, crystal and unforgettable sound not necessarily "HiFi" amplifier system?
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