Mr. Pass:

Hi,

First , I must thank you , because of you , I can finish this project with your generosity to diy community. 

My name is John , I am from Shanghai in China. I am interested with diy audio equipment, specially masterpiece of Mr. Pass. After hard working , I can now enjoy beautiful music with my diy Aleph-4 amplifier at last . 

My Aleph-4 amplifier use 6 mosfets with 1a current each , and 40 volt. so all cost energy power of 240w for one channel, in my aleph 4, I use IRFP250 on heat sink and IRFP9610 on front circuit board. When the Aleph-4 is working, the heat sink will be hot up to 60 degree Celsius. I can touch them only for 3 seconds, it is really hot , maybe the heat sink is not enough, but I think that is safe because after the Aleph-4 works for 4 hours, it still keeps 60 degree Celsius.

About sound quality, I can say it is very natural and clear, I think I should pay more money for my speakers as what other aleph diyers consider. Last, I welcome any one to email me for talking about pass diy project. 

ps: oh, so sorry for my China English.:-)