SOLD This Woo Audio 3 has some very expensive non polar Black Gate capacitors for the signal path and bias and bypasses for the power supply caps. It uses both halves of each 6DJ8 for the signal and gets the most out of the Woo 3. The entire amp is very upgraded. Black and in excellent condition. Locking Neutrik socket for headphones (upgraded). Over 500 dollars in Black Gate capacitors in the power supply and bias, upgraded resistors in all areas, Flat high purity silver wire for signal transfer (very expensive). The Black Gates are in Super E configuration, which is two power caps per side. I am moving again and am traveling too much to use and enjoy this amp. $20 shipping. SOLD thank you for inquires.