Taking the Lampizator Big 6 to the Next Level


I have owned the Lampizator Big 6 (B6) for about 4 months and can honestly say this unit is first rate. I use the Jade Audio Ref Platinum ICs from the B6 to the Aria WV line stage and a Dream State Dream Catcher PC on the B6. USB cable is the Vue Model 3. And I still am using plain ol' iTunes on a 2006 Mac Mini with SS drive and 2G RAM.

The DAC shootout thread on A'gon has covered many DAC's with some great reporting. The B6 was dismissed early on without trying other tube combinations. To dismiss a tube product because of its sound with stock tubes is blasphemy. Solid state products are indeed a better choice for such a consumer.

Manufacturers have no choice but to populate their products with off-the-shelf new tubes from tube distributors. But these are often highly compromised tubes that can not even begin to compete with the 1000s upon 1000s of available throughout the world. A little bit of effort and time, for very little investment, a swap of a pair or two of tubes can take a product to an entire new level of performance. And I discovered this with the results below.

The Good News:

The B6 version I have uses two pairs of tubes:

1: VT-99 for the Audio stage - Stock unit had Sylvania VT-99
2: 6x5GT as the Power Supply rectifiers - Stock Unit had 6u5C Russian tubes

I was given a pair of National Union VT-99 tubes as well with the B6. I was told by the seller to try both and get back with him. He said the results between the pair was quite different and he had a very clear favorite but would not comment further.

I started with the NU tubes and ran these for several days. Even out of the box, within one hour, the B6 was absolutely phenomenal. It had all the 3D magic that the legendary Manley Ref DAC from the mid 90s had but with a new level of treble clarity, midrange (piano) delineation and far greater depth. Images were far far back from the SoundLab A1 speakers that I ever experienced with digital playback. Piano decays, voice harmonic overtones carrying further up the frequency range was yet another new experience. These are traits that I often identify with a tube-optimized top tier tube line stage with tube rectified power supply, that simply no solid state line stage can touch. I could drop any solid state line stage or 99% of the ICs out there, inserted between the line stage and amps, and lose much of the magic that I now experience in my system due to the B6. The Aria WV line stage and the B6 with the Jade Ref cables are a killer match.

Finally, I switched over to the Sylvania VT-99. Wow, if they went beyond the NU, I can not even begin to imagine what might be possible. But as the out-of-the-box B6 was with the NU cranking out the magic, the B6 with the stock Sylvania was distant, much reduced harmonic continuity, piano notes not distinct, etc.; the result was a major reduction in instruments sounding natural with an overall shrinkage of the stage, most notably depth. I listened to this for a few albums but could not take it any more. A return the NU and the 3D magic and clarity was back. Anybody want a pair of Sylvania VT-99 tubes for cheap?

Three months later, I was ready to play with the rectifier tubes. But I thought I would try one more pair of VT-99's. I got a pair of Raytheon VT-99. These were nearly spot on with the NU but with just a little more smoothness which made many of the recordings sound more natural and tonally coherent. But overall, the 3D performance was neck and neck with the NU. Overall, I liked the Raytheon and I run with this tube now. But the NU is a top performer.

With my incredible experience with RCA 12BH7 destroying all 12au7 tubes in all my past components, and the awesome performance of the RCA 6SN7 in the Aesthetix components, I know that I must try the RCA VT-99 to finalize the tube choice here.

It was time to play with the rectifier. I got a different pair of Russian tubes, and also a pair each of Raytheon and RCA 6X5GT. I first tried the different designed russian tube and there was virtually no change in sound. This caught me by surprise as the tubes were very much different physically and my experience with Counterpoint and Aria products is that tube rectifier changes can make dramatic improvements at a level often surpassing changing audio stage tubes. I then tried the Raytheon 6X5GT. Wow, vivid Vivid VIVID. The sound was as if a huge spotlight had been added. Sounds came way out in front of the speakers. It was like going from a CJ line stage to an ARC line stage with so much energy right in front of you. There was far more treble detail but with the bottom half of the range much reduced, i.e., severe tonal coherency issues! It was quickly too much. This tube was out! I returned to the russian tube to get my reference sound back. After a few tracks, I then tried the RCA 6X5GT. Wow, wow, wow, now you're talking. Phenomenal tonal coherency, smoothness and upper treble detail with no fatigue. I enjoyed this tube for a few albums and then returned to the russian tube. The result with the russian tube was good tonal coherency but no match to the RCA as there was so much more life, energy, things going on, decays, harmonics and wow, dynamic contrasts with the RCA. The result of this RCA rectifier tube makes me even more excited to try the RCA VT-99.

Total cost for the Raytheon VT-99 pair and RCA 6X5GT pair is under $150. Not bad for a major component upgrade.

With the state of this B6 with the Raytheon VT-99 and RCA 6X5GT, I would put this up against the Lampizator 7 and I would not be surprised if the B6 destroyed the 7 in 1 or 2 parameters in a system that excels in 3D performance.

The Sad News:

There has been a lot of talk here on A'gon about the Lampizator USB interface not up to snuff with using an external SPDIF-USB converter like the Empirical Audio OffRamp 5, and especially with its external power supply. After keeping my eyes out for an OR 5 for a couple months, I finally snatched one up. I could not wait to try this out like nothing else on my to-do list. With amazement, like a sad sad puppy, I could not believe what I heard the soundstage was dramatically reduced with the OR5. How can this be with all the "you ain't heard the Lampi until you heard it with the OR5". Well I did and it was disappointment city. I discussed this with another Lampi 6 owner and he had only been using the USB and loved it with the NU VT-99 tube too.

I dug further and asked for advice with an electronics engineer on what might be the issue. Could it be that the new Lampi's have much better USB interfaces? Is the rat's nest wiring of the SPDIF connection to the board compromising the issue? The connection was rewired with a coax cable and updated with the "correct" capacitor. This update along with the OR external power supply resulted in the USB still creating a far more realistic soundstage. The experimentation was stopped with the conclusion that at least this generation of the B6 works at its best with the USB. My overall gut feeling here is that the B6's SPDIF likely has some issues which even the highly acclaimed OR5 could just not bring back to life. Again, perhaps this might only be observed with a system that excels in 3D, I don't know. But once again, like so often on this site, my results are so very different than many of those previously reported.

My previous experience with an older OffRamp converter with the Manley Ref DAC was outstanding results.

I had already requested and received a quote for a custom power supply from Paul Hynes for the OR5 and the Mac Mini. And later I was told it was better to run with two PS's but now I only need to focus on the PS for the Mac Mini.

The "Surprise" News:

During the USB evaluation process, it was discovered that standard 7805 3-terminal voltage regulators are used throughout the B6. I was quite surprised at this as these are hobbyist level devices that really have no business in a state of the art $8k DAC. I can only imagine the massive sonic improvement obtained with discreet circuits replacing all of these. Or imagine even a single highly regulated/filtered 5v PS to replace these would take this unit to the stratosphere. Another option is the drop-in replacement devices from Paul Hynes. A dozen of these devices might end up costing $400 or so, and might push the unit another $1k more, but wow, imagine the possibilities! After all, there is much talk about boutique capacitors in the product. Why should the voltage regulators be compromised? Maybe this would result in the new Lampizator 8 or even 9? 8-)

A Final Note:

For all of those who will cry out that what I am hearing are colorations and distortions, etc., due to the tubes, I have a piano in this room and I can plink keys at any time to hear the harmonics and decays. And the B6 in its current configuration sounds mighty mighty real.

John
jafox
09-01-14: Grannyring
One day when there is a one box solution and with the ease of a CD player
where I can access and download with no ripping etc...I will do it.

That would be something like the Aries. The only "labor" would be ripping your files (which you have already done). It is a lot less labor intensive than spinning plastic and you end up exploring and listening to a lot more music.

Being a true red blooded phile, I suspect you ditched the Lampi and Offramp cocktail due to SQ deficiencies....
No, I ditched it because of the hassles I mentioned....no kidding. I hate ripping and file management. I would still need to rip tons of my CDs. Yikes!

XLD would not rip many of my SACDs .......

For me spinning CDs is far less work and hassle. The computer sound was very good indeed.
I have to agree with Andrew(Agear) and Bill(Grannyring). I'll choose a hand built, well made/designed point to point wired component over a mass produced circuit board(thin wire traces). This method seems often to result in better sound quality.
Charles,
Ironically, the same thing has been said about TRL. I love both companies BTW. They very much remind me of each other....

09-01-14: Grannyring
Agreed Agear.
Grannyring, Got your TRL Samson yet?
Joecasey, I do! They are wonderful and have about 300 hours on them now.Great with the Dude and my Lahave speakers. The combination is special.

Paul built me some great sounding amps. The Samsons and Dude will never leave. That is saying something for someone with my feedback:)
No, they are staying, but other stuff may come and go!
Paul built me some great sounding amps. The Samsons and Dude will never leave. That is saying something for someone with my feedback:)
No, they are staying, but other stuff may come and go!
Congrats! Isn't this the 10th pair? Didn't you made the same "never leave" after every pair? LOL!
A friend has Samsons and it's a very good SS amp. Fit and finish can improve but I guess most importantly is SQ.
Ha! No, my second set and these are better sounding. Mine look wonderful and I will email you a picture if you like.
09-02-14: Grannyring
Ha! No, my second set and these are better sounding. Mine look wonderful and I will email you a picture if you like.
I believe you ... best I stop hijacking the thread.
09-02-14: Joecasey
09-02-14: Grannyring
Ha! No, my second set and these are better sounding. Mine look wonderful and I will email you a picture if you like.
I believe you ... best I stop hijacking the thread.

Joecasey doing what Joecasey does best. Audio jihadist. We're just not sure what his particular cause is....:/
Joecasey doing what Joecasey does best. Audio jihadist. We're just not sure what his particular cause is....:/
That's the consequence in leading behind. 2 more years to finish the job. FORE!!! Ouch!
I finally got a chance to try the RCA VT-99 to compare to my reference, the Raytheon VT-99. With nothing but major success with RCA tubes in many links in my system, I had the highest expectations and I admit, bias, for the RCA to come out the "winner". But it was quite a disappointment.

I listened to the B6 with the Raytheon tubes for over an hour with a few tracks each from Dire Straits, Supertramp and Steve Winwood albums. I then installed the RCA VT-99; after this was in the B6 for an hour, I started the listening comparison. Right away the lower mids were strong and well defined. Great piano fundamental power in this range. But sadly the upper and mid bass was lacking presence. Moving onto the upper mid and lower treble exhibited a significant lack of "energy" and air.

While trying to get a handle on the tonal coherency issues, it was also very clear that there was a significant reduction in dynamic contrasts. This is another strength that I listen for during a shootout.

Mid and lower treble harmonics which had so much energy and clarity with the Raytheon were much much reduced with the RCA. This resulted in decays truncating too quickly and thus a most boring listening session. This made me think of the early CD playback days or putting an ARC LS2, ML 38S or Ayre K-5xe line stage into a system that previously had a high performance tube line stage with awesome 3D performance. It takes much time and effort to assemble a system to achieve a hint of live music's 3D presence and only a matter of minutes to destroy much of what had previously been achieved.

Finally, a return to the Raytheon VT-99, cooled off for more than an hour, instantly brought back the magic I previously had been experiencing. Maqnifique!

So the RCA VT-99 was a no go for me. I will look to try the TungSol VT-99 as a last comparison here to the Raytheon.
It takes much time and effort to assemble a system to achieve a hint of live music's 3D presence and only a matter of minutes to destroy much of what had previously been achieved.

+1. That's everything, and who would think a rectifier change would bring that to the fore. Makes me wonder what other Lampi owners are hearing or not hearing. I recently introduced a new USB cable (Totaldac), and it was like a system upgrade. I have yet to roll tubes but will be doing so soon....
Well Agear, I must give credit to Michael Elliot of Counterpoint/Aria to educating me on the significance of PS tubes along with the audio signal tubes. He was one of the very few tube product designers who started with readily available new tubes but informed his customers of significant sonic improvements from tube rolling trials. And one thing he pointed out was the great benefits of the rectifier tube. And he was not kidding!

In the Counterpoint SA-2, SA-5 and Aria WV5, I tried a handful of tubes in the rectifier socket and the Amperex Bugle Boy EV4 was a killer improvement every time. I was amazed at what this $20 ebay tube could do. And this experience made me very eager to do a similar trial in the B6 .and the effort was worth it in spades.

Makes me wonder what other Lampi owners are hearing or not hearing.
So true but true for so many who are running stock Sovtek, EH and other crappy tubes in their multi-thousand $ preamps, amps, DACs, etc. Then they are not happy, and buy another product with the same crappy tubes, and on and on and on .never really hearing the magic of any of these products.

An Agon member Bart Posner sent me a ton of tubes to try on the 3 small signal tubes in the front end of the CAT amps. A lot of tube trials and I found a triplet that took these amps to a level that I would not be surprised would rival or be damn close to the latest $50k iteration of the JL-3's running with stock Sovteks. But I have read many times in these forums that Ken Stevens of CAT does not believe in tube rolling and says his products sound best as delivered. Oh well, to each his own.
JaFox, If I recall well, the consensus pick at A-Circle for the 6x5 recti was Tungsol. Gopher liked Sylvania and I see you like RCA. Did you try Tungsol, I cant recall.
There is a tube rolling thread for Lampis over at A-circle. Its under the L7, but with links to rolling experience for other levels.
So just received my BIG 6 with DSD capability (but I truly plan on listening to it for it's redbook feature.)
It has a 274b rectifier but looking to replace the stock tube with something special. Any recommendations? A Sophia Electric?
Have to be careful b/c of the room, I had mine built with the tubes all enclosed thus they are lying flat on their sides so I don't think it will accept something like a Sophia Mess Plate 274b.
I have the same rectifier in my 7, but there is no clear consensus on where to go from the Lampizator crew.
Lukasz just confirmed I can use a 5U4, GZ34, 5R4, CV378 or CV575 in place of the 274b tube. I have many different rectifiers and have always liked the CV378 that was used in my Kondo amp. Will give several of these a listen to over the next several days.
EML 274b or the shuguang WE replica 274b. That is the consensus so far.

I myself will try one of the several 5ua, 5R4,gz34 rectis I have and those that are on the way maybe 7 tubes in total to test out?
WOW! I replaced the 5U8C that came with my BIG 6 (274b) with a CV378 KB/DA rectifier tube and just unbelievable how the sound has transformed! Fuller, more detail, deeper soundstage, speakers disappear even more now and the slam that was missing is now there. Only slight negative is maybe the top end is not as open. And to think I gave many of these same tubes away at no charge to friends b/c I never had a use for them. (If I remember correctly these were the rectifier tubes in my Kondo Ongaku I had owned.)
I still have a Belvu 5U4G to try which was always a favorite and a CV575 to try but I don't know when b/c the CV378 is just wonderful.
Sksos,

What brand of CV378? Also what is other tube name?

Have you tried GZ34?
The CV378 has the KB/DA designation on the tube and if you looked up Mullard CV378 they are identical. Although they do not say Mullard on the tube.

Have not tried the GZ34 which again is a CV378 but have tried a CV575, NOS 5U4 and some 5R4 tubes and none have come close to the CV378 in sonics.
So yet another rectifier tried with very nice results. Maybe someone can tell me what tube it is from this description. On the glass itself it has:
U5 2 with and arrow above these numbers and the letter Z next to the up arrow.
Then there's a dark yellow paper liked glued to the glass that has the following nomenclature:
Z1 Z/CV 1071 (and below that reads)
Valves, Eletronic CV1071

The box that it came in says CV575

Very transparent and great extention in the top end, full sounding and only gives up the bass slam of the CV378 but again has more extention on top.
Choices...choices...
http://www.radiomuseum.org/tubes/tube_cv1071.html

Try Audiocircle Lampi forum for more tube rolling answers.
Nope note even close looking.
It looks more like a Marconi U52 rectifier with a large round base.
Sksos1, did you see Peter B or John Darko at the show?
http://www.digitalaudioreview.net/2014/10/lampizator-delivers-pulchritudinous-sounds-at-nyas-14/

and

https://www.youtube.com/watch?v=EUCNIbFKcZE

12:30 - Peter gives a nice plug.
Wisnon,

I'm pretty sure the tube Sksos1 is talking about is the same one that I have in my preamp. It's a Mullard CV378, the fat one not the skinny one. It does look very similar to the GEC U52. I agree this CV378 tube is special, but so is the GEC U52 and the WE 422a. I wish my Big 7 used this rectifier type!

http://www.mullardtubes.com/Mullard-GZ-37_Fat-Glass_GZ37/?ID=0&ProductID=155
Sksos, go over to audiocircle and see the rolling discussions ther as well as the darko link above.

Here is some recti feedback from ther:

Mullard CV378 Fat Bottle (not the skinny one) - skinny one is good but very warm and a bit slow. The fat one is fast, huge stage, and great everything, though still on the warm side.

WE 422a - this guy is crazy holographic and has vocals that remind me of the 45 Globes. It's just a damn good tube, fast, good bass, dynamics, and flow.

GEC U52 - awesome sound as well, pretty much in the same league as the others with maybe a bit more refined rounded tube sound.

Mullard 5ar4 Metal Base - if you crave SS sonics with a natural hint of tubes, try this one out. It's super dynamic and punchy. But never sounds harsh, just an extremely "spearmint/cool" kind of sound.
U52 is specced identically to the CV1071 and is a direct substitute. They are 5uaG class and you have the fat bottle rather than the skinny version i showed before. CV575 seems to be the same class of recti too.

http://www.mullardmagic.co.uk/mullard/products/319-mullard-gec-rectifier-osram-5u4g-octal-brimar-williamson-cv575-cv1071-cv1575-gz31-vu71.aspx

The GZ34 is the 5a4r equivalent. Not sure what the CV378 is but i think its the GZ37
I managed to snag this metal bae phillips locally for 410. the middle base holder is missing, but as long as it works its a real bargain!

http://tubeworldexpress.com/products/gz34-philips-miniwatt-holland-used-1956
Shawbros,

The tube is actually marked U52 on the tube and a sticker saying CV1071 is placed over it and can be seen here:

http://www.audioasylum.com/cgi/vt.mpl?f=tubes&m=260202

Indeed could be rebadged from Mullard, but its not a "Mullard" branded tube. Looks similar though...but then all U52 I have sen online look like that.
Wisnon,

I got confused with the earlier posts about the CV378. That tube looks very similar to my GEC 52 tube. I've seen this tube labeled as Mullard and Brimar. It's sounds a lot more neutral than the fat CV378, more in line with the 422a from Western Electric. It has no graininess too it and also makes the walls seem to disappear.

Congrats on the metal base Philips, what a steal! I love the cool minty fresh sound of that tube.
Hi Shawbros3,
Do you prefer the skinny Mullard CV 378 to the fat glass version? The fat bottle is rarer and more expensive. I just ordered the CV 378 for my amplifiers.
Thanks,
Charles,
Hey Charles,

I think they share some of the same qualities: full bass, body, good staging, imaging, and transparency. But the fat bottle just sounds faster with better resolving power and very dynamics. Don't get me wrong, I think the skinny one is a good tube, definitely better than many of the other variants out there, but the fat one just takes everything to a better level. The skinny one can sound a bit warmish and slow and too laid back at times. The fat one is liquid smooth and grain-free with an exciting mid-range.

Are you sure they can be used safely in the Franks? I've always asked Israel about rolling tubes and his response was that you should use the 5u4gb if you want to maximize the sound. He said the 5u4g would work but it wouldn't be optimal, which is kind of weird because the amp is labeled with 5u4g and not 5u4gb!

I guess if using the CV378 or U52 or 422a won't harm the amp, then I should try them myself! Can you confirm? the last thing I want to do is to blow up my Franks.

Did you get the fat or skinny ones?

Hope all is well on your end!
Hi Shawbros3,
Israel is strongly recommending the Mullard CV 378 as the best rectifier for the Frankenstein amplifier. He was selling the skinny versions as upgrades until he exhausted his current supply of them. This was discussed on my system page in the past week or so. Brownsfan has the skinny tube in his Frankenstein and says they're a significant improvement of the GE 5u4g he had. I ordered the skinny tube based on his and Israel's enthusiasm and this tube is lower cost than the fat bottle. I wasn'twaware that the fat bottle is better to the extent you described. Thanks for your informed reply.
Charles,
Hi Charles,

That's so odd and quite surprising. I had no idea Israel changed his position on tube rolling. But that's great news for owners of his Frankensteins.

In your system, I think the fat bottle will easily best the skinny one. I'm going to try them both over the weekend and will let you know how it goes!

Happy listening!
So tube rolling has been a great exercise and lots of fun now what hasn't surprised me is that ac cords change the sound of this dac to a good degree. I've settled on am ALLBIT Consequence by Audiomica. What has surprised me is USB cables all sound so different and can make or break the sound as well. Again I've settled on Audiomica's Pebble Consequence that is full sounding with controlled bass and just pain musical.

(Dealer disclaimer)
10-04-14: Sksos1
So tube rolling has been a great exercise and lots of fun now what hasn't surprised me is that ac cords change the sound of this dac to a good degree. I've settled on am ALLBIT Consequence by Audiomica. What has surprised me is USB cables all sound so different and can make or break the sound as well. Again I've settled on Audiomica's Pebble Consequence that is full sounding with controlled bass and just pain musical.

(Dealer disclaimer)

USB cable makes a big difference on my 7. Totaldac USB cable is king....