tube upgrade for first sound


Has anyone been able to improve on the stock tubes in the First Sound preamps? I was thinking about trying the Russian 6H23. Any thoughts? thanks
84audio
Hmm. Thanks Tvad. I hadn't considered that. I suppose, if Emmanuel entered the info, that would generate a tracking # automatically. 5 more days, can't wait. Hope I'm not letting my expectations be too high.

:-)
relax. BTW, I was underwhelmed when i plugged my brand new unit into my system. The thing takes TIME to break in, so be patient. Also, follow Emmanuel's recommendation for breaking it in, and dont tweak it (Power cords, tubes, etc) for 1 month! all good things come to those who wait!
Oldpet, send Emmanuel an eMail and he will sort out the mystery. On the other hand, it would not be the first time that UPS gives a package the grand tour of the nation, before deciding to route it finally to its intended destination.
Having said that, UPS is not as bad as the US postal service. Three years ago I sent a Christmas present by US mail from Austin (Tx) to Milano (Italy). It took just over three months. Reason is that prior to finally routing the package to Milan, my nephew's toys were sent all the way to Manila in the Philippines, where the box was opened, fully inspected, repackaged, then sent on its way to Milan.
Guido -
:-D Got it yesterday! It arrived in good shape. Whew! As I type this it has been burning in for 31 hours. Not sure where to begin talking about it. The build quality? Unbelievable! Yes it's heavy. When you open the top, you can't help but be impressed at the absence of cricuit boards. Point to point soldering all the way! Meticulously done I might add.

The sound? The first moment I heard it (forget about waiting for a listen) The power of the unit struck me. There was a visceral quality to the music. Keep in mind, up till now I've been strictly SS. It definitely likes the Krell. :-) The sounds created were clean and clear. The Sound stage was a bit narrow in the first hour of its life, but what is to be expected at that point.
Since then, stage has definitely grown. Immages are clearly taking their places in space. Highs? Beautiful already. Bass? About as good as my SS set up. With the promise of deeper and more defined bass on the way. That says alot for a 1 day old TUBE pre! I could go on. No syrupy sweet sound! Thats a good thing to me. I suppose if one wanted 'sweet', various tubes would do that trick. Only AFTER the break in though - as requested by Emmanuel :-) Natural is the word that comes to mind. Well balanced, nothing over emphasized.
But the thing that actually blows me away about this whole process - almost more than the preamp itself - is the fact that today 3/25, I recieved 3 emails from Emmanuel himself.
WOW! He is truly interested in me and my unit, and how it works within my system. AMAZING! He has given me tips and advice as to, what to do during break in, and what to expect during the process.
I'm sure I made the right choice in this endless sea of audio gear. Quality/Performance/Support - what else can you ask for? I'm impressed by the unit and by the MAN - Emmanuel Go. Believe me - It takes ALOT to impress me. I'm happy to answer any questions to the best of my ability that you or anyone else has.

I just noticed someone is selling a FS here on Agon. Why would they want to? I would jump on it knowing what i know now.
:-)

Paul