demo pair: Sophia Electric Princess Carbon Plate 300B Vacuum Tubes with 30 days warranty
Note: S.E.T. Princess 300B tube models are proprietary products of Sophia Electric Inc. Due to popularity of these Princess 300B products, there are many look alike (or early ST model) in the market trying to get a share of success from those who can be easily switched.
We have been selling this S.E.T. Princess 300B carbon plate tube as rigid plate 300B tube since April, 2006. So far the feedbacks from users are very positive. It has totally different sonic characters compared to the ever popular S.E.T. Princess 300B mesh plate model. Much like carbon composite Allen Bradley resistors in a single ended amplifier, this carbon plate 300B does have its carbon flavor and charm.
True 300B standard:
This is a true 300B tube that is 100% interchangeable with the popular Sophia Electric Princess 300B mesh plate tubes, globe 300B mesh plate tubes, and Western Electric 300B tubes, as well as current production Chinese/Russian 300B tubes (with WE 300B standard).