Responses from marco1

Upgrade from BS Node 2i?
Since you don’t like the BluOS app the point maybe mute but why don’t you upgrade the power supply in your node?  The improvement is not subtle and a good LPS can be had for a few hundred bucks.  
New Aurender conductor V4 app
Haven't downloaded yet. Does  the update show song selections on Radio Paradise like BluOS?  
Review: Dynaudio Contour 20i
Very nice review.  Congrats on finding your perfect speakers.  They were on my short list.  Never did get to hear them, but did audition the 30 when I was looking for something for my old (larger) listening room.  Loved the sound of the 30 and a... 
New Generation Class D - AGD Audion Mkiii upgrade
Don’t know about appealing to tube lovers.  Based on comments I’ve read many seem to be offended.  Personally I’ve used tubes for over 50 yrs and I think the Audion’s look pretty cool.  
Totem Mani 2 At The Thrift
The CR 2040 doesn’t really have enough current for the Mani’. A nice 200W SS amp that doubles down into 4 ohms is what you need to look for.  
Warm sounding 6922 Type Tubes
Yes late vintage Siemens can be bright.  I bought some years ago for a preamp and almost immediately put them back in the box they came in.  I think I still have ‘em somewhere 🤔   
Denafrips FPGA Firmware Update
Found it!  He did not have the 12th version of the iris or T+.  So the upshot sounds like pre 12th versions the units were not compatible.  So Denafrips re-engineered and now they are.  Well that’s progress for you.  
Denafrips FPGA Firmware Update
@liangx5  Can't answer that.  Still trying to find what I read 🤔  
Speaker and Cable Suggestions Please
Prudent advise is always try to find your speakers first.  Then in due time think about different electronics, wires, etc.  otherwise I think you’ll find that you’re always chasing your tail.  
Luxman vs Accuphase for Harbeth 40.3 XD
ya I guess 9k isn’t bad but that 6k number you got would be so much nicer :-)  
USB DACs that outperforms OPPO 105D's internal DAC?
It’s not really a question of what under $1k dac will sound better than the oppo as much as what under $1k dac won’t sound better than the oppo.  One of the reasons I put off getting into serious streaming was the poor sq I got when streaming Tida... 
Any love for the Gentalex Gold Lion 12ax7 gold pin?
The Gold Lions have never impressed me.  Though I haven’t tried12ax7’s.  Typically I find that the one’s I have tried have no soul.  
Luxman vs Accuphase for Harbeth 40.3 XD
Glad the BAT is working out.  Your post has actually pointed me in a new direction I hadn't thought about before.  I'm now looking at pairing my new QLN''a with the BAT.  First though need to find another deal like you got :-)  
Denafrips FPGA Firmware Update
@liangx5  It was very interesting reading your results with' the iris and t+.  I recently read a review by another iris/t+ owner that had a different outcome.  I don't remember which update he did but after the update he sold his iris and went bac... 
Audio Research reference amplifiers used with RCA IC`s and unbalanced preamplifiers
I did the same.  My listening levels average 80 db with peaks in the low 90's.  It's tough getting old.