New Lampizator Level 4/ Version 4 DAC in the house

"When I demos Lamp a year+ ago, Lukasz discourages tube rolling and doesn't apologies for his decision. So when did Lukasz changed his tune? Customers spoke up?"

I think there has been some mis-information going around with respect to tube rolling. I think, particularly with the ecc40s, Lukasz has cautioned customers that rolling is not worthwhile due to the fact that regardless of branding there are only two different variants.

On his flagship DAC's page he explicitly writes:

"Tube stage is supplied by dual mono, giant 5c3S tube rectified power supply (one can experiment with rolling different rectifiers like 5R4, 5c4, GZ34 , 5Y3, etc.)"

I also sat down with Lukasz last week and discussed the subject: he encourages it, but can offer limited feedback as he doesn't have access to the same plethora of American tubes we do due to the fact he's living in Poland.

In sum, roll to your hearts content!

Bill, the Thor stuff is awesome to look at as well. Bravo....

Man all these different output tubes on different versions of the dac is very confusing. I have the L4 ver 3 with 6h6p tube. Lucaz makes a a lot of sing and dance about the virtues of this tube throughout his site and that it out performs all other tubes. He even states that it is being used in his website.

Yet I am reading that 6h6p is not in the current L4. Why?

In my manual, Lucaz has stated that the 6h6p cannot be rolled? Is that a lot of BS?

You may want to do a little research.
It seems the 6H6p is the same/equivalent tube as a 6N6p.
From thetubestore dot com;

The 6N6p tube is a Russian dual triode tube. This tube is often seen as 6N6p, 6N6PI, 6N6pi, 6H6p, 6N6p-i, 6N6n-i ,or 6H6n-i. The Chinese name for the 6H6p tube is 6N6 tube. The 6N6p is a fantastic tube for preamps and driver stages, and is even used as output tubes in the Little Dot MkIII headphone amp. It has been used by the tube DIY underground for many years and is now becoming better known in the mainstream.

From the Lampizator website;

First some facts: 6H6(Pi) is written in CYRYLLIC alphabet. That's why sometimes you can find the same tube written in latin which spells 6N6P.
To my knowledge this tube has been produced only in Soviet Union (the oldest sample I found was from 1974, the newest from 89.)
It is a genuine Soviet design, unlike most of their tubes which they copied from the West all the time. The closest equivalent is the Ecc182, E182CC although the pinout is different, .
We do not want to use the impulse variant 6N6P-i later named 6N30P. We want the good old 6N6P only.

And a link;
http://www.lampizator.eu/UPGRADE/upgrade%20noval%20tubes%20to%206H6P.html

The Gen 4 has a different architceture and different tubes mate better with it than Gen 3 architecture.

To find out of tubes can be rolled is public info. Do a google search!

6h6p is a smmoth more laid back sound and some people like a more forward hard driving sound. That is the yin/yang of tube rolling, as well as better rendition of different parts of the frequency range.