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Old 25th August 2012, 08:25 PM   #2771
mikelm is offline mikelm  England
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Perhaps depends if ur talking about designs or sales.
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Old 25th August 2012, 10:02 PM   #2772
shaan is offline shaan  India
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For consumer and PA, it may well be less than 1%. For high end audio, diy audio and non-audio the percentage is higher.

That said, CFB is "the" way to go if we want audio amps which are inherently stable without compensation and allow higher gain at higher frequency. This is for better transient response, something which is often felt more and heard less, i.e. the ultrasonics. The only obstacle is offset, to which SSA front end, when input bjts are thermally coupled, is a clear winner. I believe this config will soon enter the mainstream audio industry, as the differences are not only sonically better, but profitable too. This is because I built my SSA with less (active and passive) parts than my Blameless, and now the blameless is history for me.
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Old 26th August 2012, 08:04 PM   #2773
alex mm is offline alex mm  Romania
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Quote:
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waiting sir Alex_mm making PCB layout from shaan's SSA schematic....
..... PCB for Shaan's schematic was done this weekend as naf asked
Regards Alex.
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Last edited by alex mm; 26th August 2012 at 08:15 PM.
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Old 26th August 2012, 08:55 PM   #2774
kimon is offline kimon  Greece
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"Ask,and it will be given to you"! Thank you mr Alexmm!
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Old 26th August 2012, 08:56 PM   #2775
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..... PCB for Shaan's schematic was done this weekend as naf asked
Regards Alex.
Nice one, Alex. Just a tip, if you bring CR ti the 2K2 by a separate little track right from the Speaker common point, you will really decrease distortion.
Image just to make-it clear
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Old 26th August 2012, 09:17 PM   #2776
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..... PCB for Shaan's schematic was done this weekend as naf asked
Regards Alex.
As always your capabilities are of the highest caliber! Nice Alex
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Old 26th August 2012, 10:24 PM   #2777
shaan is offline shaan  India
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Wow! Dear Sir Alex, you are a god!

Love your work. And thanks from India.
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Old 26th August 2012, 10:35 PM   #2778
shaan is offline shaan  India
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Today I (actually) probed the current through the input bjts and the VAS bjts, measured 4.5mA and 15mA after 10 minutes of warm up. Almost equal to simulated values. This circuit is surprising me since the day it was assembled.
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Old 26th August 2012, 11:56 PM   #2779
caglarm is offline caglarm  Turkey
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Its my Nico Ras version..
Of course mosfets under the PCB

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Old 27th August 2012, 01:02 AM   #2780
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Dear Shaan,

Since "we" have a nice PCB now, could you point us to your variation of the SSA.
Now I can't find it.

Many thanks,
M.
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