Modwright LS100 vs The followings

That’s exactly right.  For the Modwright, the difference in sound is not as obvious when changing tubes and cables.  For the CSL, it is VERY obvious.  I guess that’s what transparent means?  It doesn’t add anything as it is not there.  So, the CSL requires some effort to match to get the best out of it.  To be honest, when I first get it, it doesn’t match very well with my system.  I even thought if I get a defective unit.  Then I spent quite a lot of time playing with all different combinations of tubes and cables, and finally found one now that I feel it sounds quite good now.  Since the DAC sound so good with the Modwright, I can’t imagine I need to change the tubes initially; until I tried back my old Audio-gd DAC and doesn’t have that kind of distorted sound.  Finally, I found out the stock Chinese 6N1P tubes with gain set to high solve the problem!  All my nice vintage tubes doesn’t work, really have no ideal.  But anyway, I am happy now.  

Actually, I am not 100% correct.  While the DAC sound good with ModWright, it is actually not “right” but I never realize it.  After I change back to the stock 6N1P, when I go back to ModWright, it sounds more “correct”. There are more slam as how I hear the same song at my friend’s place.  

Hi@gte357s,
I’ve never heard an Otomon Lab amplifier but I know they are highly regarded custom Japanese products. I would imagine that it mates well with your two line stages. Does yours utilize Tango or Tamura output transformers?
what 300b tubes are you using?
How does the Otomon compare to your Triode Lab 2A3?
Charles

@charles1dad 
it uses the new ISO Tango but not the Hirata Tango.  I tried a couple 300B: Shuguang black treasure, Sophia Princess and TJ Full Music.  The Black Treasure has the darkest sound and at the same time feeling less dynamic.  The TJ has the most dynamic and extended, but in certain songs with guitar playing some higher notes, they sound a tad thin.  The Sophia Princess is in between the Black Treasure and TJ.  With the CSL, I prefer the Black Treasure or Sophia.  But for ModWright, I use the TJ.

it is hard to compare the Otomon 300B to the Triode Lab 2A3 because one is a power amp and one is integrated.  I feel the Triode Lab sounds very good too, while the music is a bit lighter and faster than the Otomon when it is paired with a Luxkit (Luxman) a3300 preamp.  I feel the Triode Lab sound signature is more like the CSL, definitely not ModWirght which has high tonal density which gives the texture of guitar.

@gte357s,
Thanks for your impressions. According to Thomas Mayer who builds heirloom level amplifiers, he said he finds the ISO Tango and HIrata Tango output transformers equally excellent.
Charles