Some news on the EL38 tube problem: I gave them some extra amp hours and the distortion is gone. It seems that the tubes needed to "settle". I find this effect very strange, never in my life had a similar behaviour with any 6SN7, 6080 or 6AS7G tube. Perhaps...the EL38 were brand new/ never used?

Interesting! My problem is that I only have 6SN7 tubes for drivers. I will try with a few of them but I suspect that changing the tube family might make more sense. I have some Russian 6H8C that could do the trick too. Thanks for the info!

Thanks for checking @connieflyer, I have tried different drivers with the same result. It seems to be mostly in one channel now that I checked carefully. When I swapped the tubes, the distortion changed to the opposite channel, so one of the tubes seems to be to blame here. I have contacted the...

I finally received the EL38 adapters from China. I just fired up Euforia with 2xKen Rad 6SN7GT as drivers and EL38 as power tubes. The sound is pretty amazing, even with almost no warm up of the amp. I guess the word that comes to mind are "depth" and "speed": bass notes are so precise! However...

Tack så mycket! ;-) Totally agree about the synergy factor. I have some of those Foton tubes, they are very transparent too!!

While waiting for the Swedish toll authorities to process my EL38 adapters, I have been playing with some old tubes that were collecting dust in a drawer. After trying different combinations of power tubes (Bendix 6080WB, GEC 6080, Tung-Sol 6AS7G, Tung-Sol 6080) with drivers (Sylvania 6SN7...

BTW, does the EL39 require special adapters or the adapter for EL38 works?

Hello! my apologies for taking so long to answer, I have been abroad 2 weeks for work. Thank you very much for the advise! I investigated a bit more the issue. It turns out that things got a lot better 1h after I turned the amp on. So it must have been a warm up effect. The weird part is that I...

Please, could you remind me what was the maximum total current draw that is recommended by the manufacturer?

Hi guys, I have been silent in this thread for almost one year :-) I had a bit of a weird experience with my Euforia. After quite some time I went back to my Project Ember with a 6SN7 tube and, although it is less clear and the stage is significantly smaller, I actually feel that Euforia is...

It has been a while since I checked this, but as far as I can remember: Polaris: Solid state amp works with most headphones in terms of impedance (class AB amplification). Ember: tube pre-amp + solid state output stage, works with most headphones (AB amplification). Solstice: similar to Ember...

I have a Polaris and the He400i. The latter are not very different in bass character compared to the 560s to my understanding. I use Polaris with the lowest output resistance and full-bandwidth. That way the bass hits a beet deeper in my opinion. The problem of the He400i is that they have a...

I have both, one at home one at work. The sound signature overall is rather similar, but there are subtle differences. Both are excellent all-rounders. In my opinion, the Polaris has a better defined bass. Not necessarily thinner nor fatter, just more articulate, you hear it slightly more...

Hi Tj, I have done it, and it works. The only problem I had is that some tubes of the 6DJ8 family would cause a hum. Thank you @mordy!

Hi guys, has anyone tried using a E88CC to 6SN7 adapter with euforia? I have a bunch of 6N23P around and also 6N6P-I that I could consider trying as driver tubes. Not sure the latter would work. I would have standard 6080 or 6S7G as power tubes. Happy new year!