Hi Richard, it’s been many months now since I purchased 8 Sophia 6sn7's for my Cary 05 preamp. At this time I have to tell the audiophile world that these Sophia 6sn7's are by far the very best type tubes I have heard in my system. I have tried the very best NOS types spending many hundreds of dollars to find the very best, no more looking. Again these new tubes have super wide sound stage, very smooth musical 3D midrange and very low distortion, Bass that sounds bigger and more powerful. Richard Thank You for offering these tubes to the audiophile world. Mario

I just wanted to let you know that I am truly enjoying these tubes in my pre-amp! The overall balance is just stunning to say the least. I still feel they are settling in as they seemed a bit aggressive initially but I really noticed today how the high frequencies are becoming smoother and airier with a greater sense of effortlessness which is a good sign indeed and a very difficult aspect to achieve. My system has evolved over many years with essentially the same components but a lot of tweaking so it is very finely tuned and highly resolving. Image depth, soundstage width, dynamics and the overall ability to hear what is on the recording and connect to the performance is better realized with these tubes in a not so subtle way. In addition I want to thank you for the close match on the triodes of each tube, this along with the greater mutual conductance I measured compared to some of the other 6sn7 varieties I have on hand must be contributing a lot to what I am hearing. I had a friend over today who is quite familiar with my set-up and he was absolutely floored with the improvement.

William from Florida

I have been "on the wagon" the past few years since I was too busy at work. That has all changed over the past 8 months and I have had the opportunity to spend some time fine tuning the system. I will say this, to all you folks out there with tube gear, that having gone through numerous NOS and various new tubes from different manufacturers over the years in both my Supratek Syrah pre and Berning ZH270 amp I recently installed a pair of closely matched Sophia Electric 6SN7 line tubes in the Supratek. Before installing I thoroughly checked out the tubes on my Hickock tube tester and I have NEVER seen a more closely matched pair of tubes, bar none. These guys really do some serious matching. The results were staggering out of the box. The increase in clarity, dynamics, bass control and balance at all frequencies was beyond anything I have experienced with any other tube I have tried and I've been through MANY of them over the years. Bottom line for 200.00 these tubes are some kind of real "high end" bargain. The great thing is they still aren't broken in; I can still detect a bit of harshness especially in the upper frequencies but see where this is going. They only have 10 hours and 100 is what they recommend before any serious analysis. Impressive indeed and along with the MHDT Havana with an early production Bendix 2C51 output, I feel I have hit the jackpot on a small bet! My vinyl rig is the next project.