So it is balanced by differential circuit? Thanks ckc

Sorry but I can't read schematic. Does this mean the XLR outputs on this DAC is not really balanced?

Anyone know the XLR output implementation on the Stereo192 DSD DAC?   Is it balanced by 1) Differential Circuit, 2) Single Ended Circuit with Transformer Balanced Outputs or 3) Single Ended Circuit with OpAmp driven differential circuit?   Thanks, ckc

  Which DAC are you using? If using Bifrost w/ USB, which version of the USB?   I ran into this random high pitched whining sound when i was using 1st Gen USB card on Bifrost. Issue went away after i upgraded to Gen 2 USB.   ckc

No, they are 6DJ8 / ECC88. Bass is not bad. ckc

Gotcha, hope they make things right and send you true platinum grade replacement. ckc

+1 IMO, Orange Globes made in the 60's with O getter sound the best. They are great for rock and electronica music. For female vocal, they are a bit too forward/in your face sounding. ckc

Did you validate using your own tester? ckc

It would be helpful to know which tubes he's comparing to and headphone used. ckc

For warm and smooth in that price range give the 1959 Bugle Boy D Getter a try. This seller is very reputable and well known on this thread. I've purchase several tubes from him. He's usually pretty good at accepting reasonable offer. http://www.ebay.com/itm/321444001632 ckc

+1 Anyone compare the BDP-105 DAC vs standalone DAC ? Thanks, ckc

Go for the halo getters. ckc

There are small and large O getters BB tubes. I believe the large O getter ones are made between 1960-1962 and small O getters are made in 1963+. The D getter ones are made in 1959 and are best sounding BBs. ckc

For under $110, my vote goes to Amperex BB with D-getter. ckc

  Hunt down some Lorenz Stuttgart PCC88 3-Mica and be done with it. These were my end game tubes for the MB Air > Bifrost Uber > Lyr > HE-500 combo. If you search through the original thread, you'll see many references on these by veteran tube rollers.   ckc