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First reaction: HOLY SHIT! This album is killin' it right now!
The Vinnie Rossi LIO DHT. Tubes that don't sound like tubes. I have no idea how he pulls this off but it's mind boggling.
Let me first say that I confirm and agree with all of the touchstones that Vinnie discusses on the website under the heading "I put a spell on you..." I also agree with all of the comments made b Zybar under the thread "DHT upgrade is complete." So right now I am going to just give a short four word review and a shorter 1 word review.4 word review: I could sell tickets.1 word review: Delicious
After more extensive listening I will give more details and expound especially on the term "delicious." I know, I know ... other DHT recipients have said the same thing and you never hear from them again. Well its hard to tear yourself away. But I will ... "believe me."
Where to start: timbre is perfect, air air air everywhere. Soundstage is crazy good with picture placement of instruments. But for me the real killer is low level detail usually hidden underneath, between bigger sound on the soundstage. Another killer is the sound of violins, woodwinds and tympani (you can hear the membrane pulsing back and forth a delight usually enjoyed only in a live perfmance). I have played a lot of my old standbys and they are beautiful with a new life to them but some of my least played stuff is now finding a way onto my Hqplayer playlist. The soundstage has a trapezoidal feel: very wide up front, oodles of depth but a bit of shrinking in width ever so slightly at the very back. I'll take it. The dynamics are very very wide. I find myself gain riding the remote to not upset my amp.Well done Vinnie man you did good on this one.
PS: More soon, but I need to get back to the builds...
Yeah, I haven't seen my unit yet.....
With the stock 2A3 dead quiet even with my ear on the tweeter, I'd have no need to hide the glow bottles from sight.Stay tuned for the sonic conclusion...
How can any decent human being cover those lovely 2A3 tubes. I say it is a disgrace!
Leaving them unwrapped did this...always wrap it.
Thanks for the public service announcement! Best,Ed
It's now the Phuckin' DHT!
I have read the review of Vinnie Rossi’s dht tube preamp in 6moons with great interest.I wonder how Mr. Rossi has implemented his tube stage in the LIO. Normally It would be anoffend to ask an engineer about his secrets, but this time there must be an exception for good reasons:Mr Rossi said the dht tubes are driven from the internal capacitor bank supply, the filaments from outside.The capacitor bank provides 24 to 20 Volts, and running a dht tube like a 300B's plate so low is quite extraordinary,it calls for a very strange operating point, the grid had to be almost zero or even slightly positive, which would cause other problems. The only solution could be a dc-dc converter, but Mr. Rossi said there is none. I hope that Mr. Rossi or anybody else is going to unveil this mystery a bit.thank you Andre
They're multiplying!! Hey J, Why two? just curious how your system is set up for them and why. Sorry if you explained already and I missed it --been gone for a couple weeks. Jason
Hello Vinnie between the 300b ,and 2a3 sonicly would you say the 300b has more richness tunes to the mids ? Sonicly both very respectable DHT tubes . What is the best attribute of each tube from your observations?Thank you,PJ.
Again, no request for secrets here, but are you saying you are not amplifying the DC voltage? I assume that you have raised the plate voltage to one of the linear operating points on the data sheet. Is that right?
PJ,It really depends on which make as much as which tube. The tube that had the most richness in the midrange to my ears was the Svetlana SV-811's. I have heard multiple 2A3 and 300b tubes and each had its own sound and unique characteristics.
Yep, Vinnie and I have listened to this a lot at my house.I use "Drum Trip" and "Laugh As The Sun" as test tracks. When I turn it up loud, I feel like it is 1994 and I am standing 5' away from the band in a small bar in Rochester, NY.George
Just set up my system today and it sounds fantastic. Many thanks, Vinnie, for a great addition to the LIO.