so pars posted this.

http://www.diyaudio.com/forums/group-buys/315474-pure-tube-es9038pro-9028-9018-akm.html#post5259820

all sorts of wrong. lets start with the fact that current output D/A converters really like driving a zero impedance. 27 ohms is not a zero impedance. So with +/-1.2ma you get +/-32mv and then you use the tube to amplify the crap out of it. Nope, definitely not the way to do this. All sorts of noise etc...

a while back there was bakoon and audio-gd pointing fingers at each other as to who designed satri and when.

so here is the satri version 4 circuit

satriic.PDF

and here is how audio-gd turns it into both the I/v converter and acss current output and voltage output (one at a time, not both)

audiogdiv2.PDF

performs better than anything else I have seen

ideas in progress as work on the ultimate dsd/r2r dac

Edited December 2, 20178 yr by kevin gilmore

which unit of theirs is this? I like the massive decoupling

this one

http://www.audio-gd.com/Pro/dac/RE52/RE5.2EN.htm

around 2013 time frame. very nice sounding piece, but no dsd

 

14 hours ago, kevin gilmore said:

 

ideas in progress as work on the ultimate dsd/r2r dac

 

 

Does this mean what I think it means ?

Using Resistors as passive I/V stage? Rumors are that it measures really bad, but sounds somewhat clearer and more natural than an active IV stage. Of course the resistor has to be of low noise, high precision type.