Here are some initial comments on my Lampizator Big 5 based on basically little listening time/break-in.
Bought this Lampizator Big 5 for my new headphone listening station. Currently I have a Spritzer built KGSSHV driving the Stax SR-009. I have been using a Chord Hugo to act as the dac, but have tried various other ones. In fact, I am still waiting on my PS Audio DirectStream kit to test against as well. Tomorrow, I should get my EC 2A3 MK IV (no idea why all my ordered equipment is coming at around same time) to drive my LCD-X so I can compare dacs with that headphone/amp combo as well.
My Lamp Big 5 is using some Russian 6X5 rectifier and Raytheon 6SN7GT as power tubes and the DSD module. It is singled ended with the Amanero USB being fed my a new CAPs Zuma server (http://www.computeraudiophile.com/f10-music-servers/new-zuma-computer-audiophile-pocket-server-version-extra-small-please-20656/#post324950
) which also happened to arrive today as well. Used JRiver (will test JPlay later) to play variety of redbook to DSD and high rez flac files.
Right off the bat, the Lampizator had significantly more bass than the Chord Hugo and other DACs i tried. The bass wasn't flabby, but it was in your face. A bit too much bass on certain songs to my taste, but a bass head would be in 7th heaven. I was able to get something more to my taste via tube rolling (more on that later). Just to spill the beans, it is obvious that the Lampizator is on a higher level than the Chord Hugo. You can hear this right away without having to do any critical listening, which I'll do later. I'm sure under critical listening, the Hugo will have its pros, but seems pretty obvious that the Lampizator is better (portable can't beat a well designed desktop DUH). Right off the bat, I find the Lampizator to have a cleaner sound while maintaining the musicality (is this a word) that both the Hugo and Lampizator have. Also, the bass was better on the lampizator resulting in a more balanced sound. More detailed comments later.
However, I do want to point out a possible tube roll. As FYI, I have a bunch of tubes (6x5: bendix 5852, tungsol 6x5, brimar 6x5; 6sn7: tungsol oval plates!, hytron 6sn7, RCA 5692 red base) to test so I might find a better combo later. However, while Lukasz was around, I asked him about putting Bendix 5852 in the 6X5 socket while leaving the raytheon 6sn7 in place. Bendix 5852 are drop in replacements for 6X5, but they draw about double the current so if your transformer isn't up to the task, you are likely to have problems with in at some point in the near or far future. I didn't think a rectifier would make so much a difference, but wanted to try the Bendix while a Lampizator expert was around. In any case, Lukasz thought there wouldn't be any problems, but he did think that an in-line resistor might limit the Bendix so soldered off the resistor went and re-soldered back to the tube socket. Lukasz checked the voltage, etc after the bendix were put in and everything looked okay. He thought that the resistor might not have had to come off. In any case, it was a tremendous difference in sound (and in my opinion better). The sound stage suddenly grew by leaps and bounds with the result in the sound stage seemingly being past the headphones. Just as interesting, it moved the bass further away (sort of going from front row to 4-5 row) that allowed me to enjoy and hear the details on the bass. The other thing I noticed was suddenly the Lampizator seemed to be faster/dynamic while still maintaining its warmth and nice decaying transients. I would highly recommend this combination. However, I would recommend you try it without removing the resistor. If the sound still isn't fast enough for you or the sound stage not big enough, you might consider removing the in-line resistor, but I would confirm that it is okay with Lampziator first. Not sure if the resistor is making a difference or not. Oh, I have a source for basically perfect Bendix 5852 at around $60 each.
Well that's it so far.