does any r2r ladder dac have standby power mode?


if anybody can help me who has one .I am looking at the audio gd r8 mk2 and the denafrips pontus or venus .do these dac have a standby power mode thanks kully
kully560
Can't speak about either of those but Rockna R2Rs have standby.  The Wavelight is controlled from an app on your phone.  
denafrips just email me back if anybody is interested the denafrips dac have a standby mode which will give a warm start and keep the r2r in thermal equilibrium temps!!!
I just check with underwood hifi, the audio gd dacs remain on all the time with no standby.