Hi Guys, first of all, any buffer we do will be more expensive and higher performance than a Yaquin unit. I can't compete with Chinese mfg. cost and I won't even try. Not that there is anything wrong with these units, but I am aiming for something to perform at a higher level and will be priced at a higher level.
As to the WFS STP-SE: I am not sure that I would use a digital display. Several reasons for this, but first of all, I would rather not use a digitally controlled attennuator for this. It does appear to be a very well designed and thought out device.
I would prefer to use transformer coupling for balanced output, simply because there are numerous benefits sonicly do doing so. There is also cost however, for good quality transformers.
I will have to determine how far this design will be taken. There is a broad range between the Yaquin simple tube buffer and WFS full passive/active preamp design.
I will take all of this feedback in mind. I expect there will be a couple of models, at different price/option levels.