Quote:
Originally Posted by
Kingwa 
There are the class A discrete amps built in, not OPA chips.
So the power spend is more than built by OPA chips .
The temperature increase around 25 Celsius while after 30 minutes.
Keep it have not other things cover on top is enough safe for working a lot years.
I have do the test with other people of the temperature, usually hotter than 45 Celsius, the people feel quite warm.
If hotter than 55 Celsius, hold on and more than 1 minunte, the finger feel inacceptable .
If more than 65 Celsius, the finger wish take away after 10 seconds .
Some class A amp even have 80 Celsius on the heatsink like the old KRELL.
In compare, the NFB11.32 just cool.
Thank you for your answer!
There are 6 power supplies on 11.32: two of them made with discrete transistors, 3 made with some 317 IC's, and 1 made with 7805 IC.
Reading audio-gd site, I presume first 2 discrete transistor sources were made for analog part (class A amps). They are really cold!
I am worried about the other 4 sources. They are hot! At least two of those hot sources are for digital part.
I've made some measurements. There is nothing wrong with electronic design.
I think it's about case. This compact design has a glitch: NO VENTILATION! That's wrong for electronic parts.
I admire your courage to offer 10 years warranty.
And talking about KRELL, I wish Audio-GD to reach the same level, although at this moment there is a long distance. Which is valid for our pockets too!
