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VSSA Lateral MosFet Amplifier

What's inside silver boxes? 😱
 

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Lazy Cat I hope they were not matched? Because they are not going to survive this I think... So how many should I order for replacement???

Not exactly matched but both having high hFE ranging from 550-650. Trimmed CCS-s ensure proper DC conditions over wide supply voltage and temperature range, output DC offset fluctuations only a few mV and no power on/off thump present. 😉
 
VSSA T03

New board based to VSSA T03 by Jason kuetemann: CCS-2N5462 at 2,4ma, TLVH431APL /16volt reg at 2Volt on gates -180ma ,2SC3503D-2SA1381E at 12ma all works fine offset total zero.
Very details amplifier.
If someone wants the pcb pdf its available.
 

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VSSA

Just fired up my VSSA 0mV on both 12mA VAS bias and 4V on 22ohms. There is hissing sound if you put your ear near the tweeter. It is just beginning to open up. Compared to my PP KT88 my tube amp sound better at first. But after 2 hours of listening the sound almost even with my tube amp. I Am using a temporary power supply with 30V-0-30VAC input. I ordered my SMPS800RE from Connexelectronics.