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Old 30th July 2012, 04:23 PM   #71
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Default Hello People I'm back...again...

I want to present you my new update to the schematic.

I discovered that lowering the current trough the driver stage resulted in better sonic performance of the amplifier. I tried lowering it from near 50mA to near 25mA and results are excellent. I think that 50mA was too much...

The only thing that need to be changed is the resistor pointed on the picture from 220R to 330R.

Now enjoying the even better sound

Wish you all the best.
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Old 30th July 2012, 05:26 PM   #72
Jay is offline Jay  Indonesia
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Quote:
Originally Posted by astankov View Post
I discovered that lowering the current trough the driver stage resulted in better sonic performance of the amplifier.


The only thing that need to be changed is the resistor pointed on the picture from 220R to 330R.
Are you lowering the driver current or increasing the output current? The IRF loves much current for sure.
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Old 30th July 2012, 06:41 PM   #73
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Quote:
Originally Posted by Jay View Post
Are you lowering the driver current or increasing the output current? The IRF loves much current for sure.
Lowering the driver current and yes they love much drive and idle current but that's the result that I experienced - it is a bit paradoxical isn't it.
Simulation also confirms my discovery it shows less THD but this can't be absolute accurate - we know very well that sim's and real world are two completely different things.

Regards!
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Old 30th July 2012, 06:53 PM   #74
Jay is offline Jay  Indonesia
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Quote:
Originally Posted by astankov View Post
Simulation also confirms my discovery it shows less THD but this can't be absolute accurate - we know very well that sim's and real world are two completely different things.
I think I'm lucky that I found simulation is very "accurate". The THD number is not accurate, but the relative performance most probably is. The difficulty is when each amp/setting has strength and weakness in different area, then it will be hard to judge which factor will decide the final performance.
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