New Lampizator Level 4/ Version 4 DAC in the house

Bill,
I thought hard about going with a Level 5 because of the dual mono power supply but since the PS on Level 4 seems to be overbuilt as it is,

we build a tubed power supply which is at least 400% oversized to provide the unheard of purity, authority and grunt.

and considering the DAC market is not yet mature, I decided to opt for the less expensive L4G4, which seems to be a fully evolved design for Lukasz. Once that was decided, I didn't see a need to change much else. My specs included;
1. Whatever rectifier Lukasz has found to be the best, in his opinion.
2. Additional USB input.
3. Change S/PDIF input from an RCA to a BNC type.
4. Duelund capacitors.
5. Black faceplate.

I decided it was not necessary to go with a balanced DAC. My preamp treats unbalanced and balanced input signals the same and then the signal is converted to balanced as it outputs through transformers.
I know you like the Jensens but I found the temptation to go with the Duelunds too great to pass up.
I will not know my rectifier options until I learn which tube Lukasz uses in my L4.
I am curious whether folks are rolling signal tubes in the L4. It is hard to find information on what is used and I couldn't find much on the Lampi site, but I understand he may be currently using NOS E182CC tubes, which are the same as CV5766, and perhaps 6N6P. I understand he previously may have used ECC40 tubes?

None of the Lamp dacs are flat and 2D. Not the L3/4 nor 5

"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?