Yes terminal 13 & 15, and i found a tonal difference with the choke. Kind of like a tube swap, overall a cleaner sound with better detail in vocals and instruments. As well as a dead quiet noise floor. I have been listening to high res 96 kHz/24 bit flac files run threw a squeezebox Touch then dac with some excellent results, incredibly detailed sound, had a hard time taking off my Senn Hd - 600, I am beginning to understand the level of addiction to the Crack and it really is a good thing. (: