Quote:   I did not have enough low watt resistors to do a final job this weekend, but I did reduce the gain for my Zero 09 DAC slightly, as a headphone amplifier for HD 485.   In the duel op amp in the zero 09 headphone amp, one channel set up as a non inverting buffer with 100%...

My Zero is an OK device, but the Gain is wrong for my headphones, This is my work set up. Its the "09" version and it has too much gain for my Sennheiser HD 485 a high efficiency low resistance at 32 Ohm headphones 110dB, this is particularly annoying as the range on the volume control tracks...