Sophie Electric

Sophia Electric™ S.E.T. Princess™ Carbon Plate 300B 2.5V Vacuum Valves for 2A3 Amplifiers

We have been selling this S.E.T. Princess 300B carbon plate valve 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.

Note: S.E.T. Princess 300B valve 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.


Option 1: Premium matched pair with one year warranty (ceramic base).

Option 2: Premium matched pair with 30 days warranty (ceramic base).

All prices include VAT.

Orders and warranty