The buffer is not used when in headphones mode. When using the line output, you can use the buffer to tune the sound produced by the I/V.
In line out mode, all three opamps are used. In headphone mode the buffer opamp is replaced by the can amplifier chip.
In line out mode, all three opamps are used. In headphone mode the buffer opamp is replaced by the can amplifier chip.














Will be back with some impressions as soon as I get my opamps! 

I basically only need two (or three if I use one in the buffer spot) so I'll give the rest away for free for the ones in need.



