Hello Hasan,
Congrats on your choice of DAC, welcome to the elite!
With regard to tube selection in this dac, it is very hard to say which would sound better to you out of your choices, and replicating what worked well in your headphone amp would not necessarily offer similar results in the dac. Trial is the only real way of knowing I'm afraid, but this is trivially easy in this piece anyway. My current preference is for Mazda 6189 or the Tung Sol 12BH7. Sometimes the BH7 is a little congested, so for rock etc it is great because it has a deep and strong bottom end, with real punch. The 6189 gives a slightly more balanced output, very refined and holographic, great for jazz, classical, and pretty much anything really. I use the Mazda 6189 in the CF080LSX2 pre amp also.
With regard to actually using the BH7, there are some differences to AU7's, and you are perfectly correct, Masa Tsuda does recommend AU7 in this piece, but BH7 is ok, it won't cause any harm.. However, Masa Tsuda is 'the man', an audio designer and manufacturer that I have unending respect for!
In addition, the upgrade to this DAC of a battery to power the dac chip itself is nothing short of astonishing. Sublime is a word that keeps appearing in my head when i'm listening to it, clarity, transparency, tonality and depth of the soundstage have all been helped with this implementation, as have dynamics. It seems that you are 'exposed' to the recording more and are delving deeper into the event that took place in the studio, concert hall or wherever. I'm now very curious to test it with a top level transport such as the MT or Zanden as Lloyd knows:-))
Best Rgds,
Paul.
Congrats on your choice of DAC, welcome to the elite!
With regard to tube selection in this dac, it is very hard to say which would sound better to you out of your choices, and replicating what worked well in your headphone amp would not necessarily offer similar results in the dac. Trial is the only real way of knowing I'm afraid, but this is trivially easy in this piece anyway. My current preference is for Mazda 6189 or the Tung Sol 12BH7. Sometimes the BH7 is a little congested, so for rock etc it is great because it has a deep and strong bottom end, with real punch. The 6189 gives a slightly more balanced output, very refined and holographic, great for jazz, classical, and pretty much anything really. I use the Mazda 6189 in the CF080LSX2 pre amp also.
With regard to actually using the BH7, there are some differences to AU7's, and you are perfectly correct, Masa Tsuda does recommend AU7 in this piece, but BH7 is ok, it won't cause any harm.. However, Masa Tsuda is 'the man', an audio designer and manufacturer that I have unending respect for!
In addition, the upgrade to this DAC of a battery to power the dac chip itself is nothing short of astonishing. Sublime is a word that keeps appearing in my head when i'm listening to it, clarity, transparency, tonality and depth of the soundstage have all been helped with this implementation, as have dynamics. It seems that you are 'exposed' to the recording more and are delving deeper into the event that took place in the studio, concert hall or wherever. I'm now very curious to test it with a top level transport such as the MT or Zanden as Lloyd knows:-))
Best Rgds,
Paul.