User Reviews/Feedback for Sophia Electric™ Carbon Princess 300B 2.5V Tubes

Received date: September 19, 2014

Just to let you know, the Princess Carbon 300B 2.5V tubes arrived safely in Norway, perfect condition. I am very happy so far. As you predicted, rich and full mid-range, extending into a nice, tight bass. Also there was much better detail and even so dynamics. But the most unexpected effect was a much improved soundstage. My Klipschorns speakers are placed quite far apart, and due to the geometry of my listening room, there was a tendency to "a hole in the middle". With your tubes this has now disappeared. There is a homogeneous wall of sound in front of me, but with an accurate positioning of the instruments. This was a surprise, and when I think of it, this is the most valuable benefit of your tubes, although not what I was after in the first place. So I got midrange, I got bass, got micro- and macro dynamics, got better detail, and as a huge bonus, a splendid soundstage. I strongly recommend your tubes.

Equipment: 2A3 Audio Note Neiro amplifier & 60th anniversary Klipschorns



Received date: May 17, 2010


Oh my! These are some sweet sounding tubes. Soundstage, clarity, sweet midrange, tight bass, great highs - these tubes have it all. They blow away my RCA NOSs and AVVTs. They seem to sound with better each hour that I listen!

Amplifier: Cary CAD-2A3-SE signature series
Preamp: Cary Audio
Speakers: 1970's vintage Klipsch cornerhorns

Thanks for the recommendation.