The one with single transformer and heatsink is the LITTLE brother of my ZEN amplifier. I set the bias currents amount of 1 amperes to each channel. So the both channels draw 2 amperes from single 5 amperes, 25 volts power transformer. I use IRF9540 and IRF540 for the MOSFET devices, and BC559 for the current setter for IRF9540. Like Mr. Pass said, IT WORKS FINE (^ _ ^) and I like the sweet sound much...

The other one, which is consisted 2 power transforemers, is the BIG brother. I set the bias currents up to 2 amperes like the articles suggested and Mr. Pass told me via my e-mail. I use IRFP9240 and IRFP240 for the MOSFET devices. Since the high frequency was so bright, I cut them through 220pf MKP capacitors on the RCA input socket. I don't know if this is what Mr. Pass called as high frequency distortion of the MOSFET gain devices compared to IRFP040 or IRFP140 :-( The sound was more warm and liquid compared to his LITTLE brother with Yamaha CD player, 7DJ8 Tube pre-amplifier or Aleph P 1.7 pre-amplifier, cables and 2 way speakers configuration. I noticed the detailed was richer than his LITTLE brother, too... :-)

I use fan to make this amplifier more 'reliable' in shape and package like the ordinary amplifier, and seems like : "The great idea should wrapped with the great enclosure" ;-)

Well, enjoy the pictures guy... Thank you PASSDIY, and Mr. Pass for your support to DIY community...

Best regards, Karnovim Salim.