Art Audio only sells Grade A Tubes from Sophia Electric in matched pairs or quads.
Introducing Sophia Electric Classic 300B & Aqua 274B
After a few years of experiments and audition comparisons, Sophia Electric is proud to introduce Classic 300B tubes to the audiophile community. The Classic 300B has a unique blue glass but has the identical glass shape and metal plate structure of the vintage WE 300B. Most important, it has the soul and mid-range magic of the vintage 300B. To address the high frequency and bass limits of the original WE 300B, Sophia Electric has created a new rectifier tube - the Aqua 274B. The Aqua 274B will deliver exceptional high frequency and bass extension in the circuit to compliment the Classic 300B sonic character. Together this duo will produce the magical midrange of the original WE 300B as well as the high end extension and powerful bass response of a live performance.
How does this new Classic 300B + Aqua 274B compare with the current top of the line flagship Royal Princess 300B? The answer is that both achieve first class audiophile sound, however they have different sonic characters. The Classic 300B + Aqua 274B combination has the metal plate character for a more natural presentation (closer to mesh plate); the Royal Princess has the exotic rare earth material carbon composite plate for greater resolution and nobleness.
If you have listened to either the Royal Princess 300B or Carbon Plate 300B tubes then the Classic 300B + Aqua 274B will be a new, fresh and unforgettable experience.
If you have not listened to Royal Princess 300B and money is not an issue, go for the Royal Princess 300B.
The above discussion is for 300B single ended amplifier that Classic 300B tube is preferred to team up with Aqua 274B.
For push-pull amplifier design, the circuit itself has plenty of extension on both ends. Lean sounding is the problem for push-pull design, so that audiophiles seek to use oil caps to roll off the highs to make mid range more listenable. Thus, the Classic 300B is the perfect tubes for push-pull amplifiers.
Considering the vintage 1950s WE 300B is selling in $5000 range for a pair. This new Sophia Electric Classic 300B with blue glass is truly a bargain with superior sound.
This tube usually ships within 2-4 business days.