Mazda Chrome Plate 12AX7
NOTICE: We ONLY have buffer grade, meaning the tube is quiet BUT not low in microphony. That means that if you use them in a gain stage of a preamp you may experience microphony. They should be used as a buffer or something similar.
If you don't know what that means then we suggest don't buy them. Tubes are not refundable or exchangeable and we don't want you unhappy.
Mazda 12AX7/ECC83 - No... not the car company. Super rare French Military, made by British Thomson-Houston, that made some of the finest triodes in Europe, and one of the oldest tube companies in the world. Mazda was part of the Thorn AEI group in England who made Brimar and Ediswan. Prior to finding this stash, I have only seen a couple examples of this tube in the U.S., and we're very excited to have them.
Chrome plates are vintage 1959-1963, and were very popular in the recording industry in Europe. Heralded as the best by Mesa Engineering for the Tigris and Baron. More lively on top than the earlier production grey plate. Very neutral and clean, with excellent extension on top. This is not a warm sounding tube, so if that's what you're looking for, check out the Mullards.
Platinum grade - The best of the best. Lowest noise and microphony with the tightest triode balance we have available. This is typically 10% or tighter, but may be higher depending on available stock.
Gold grade - Low noise and microphonics with a triode balance typically between 15% and 20%, but may be higher depending on available stock.
Driver/Buffer grade - Lowest noise but not the lowest in microphony. Triode balance will be similar to Gold grade.
This grade is only suitable for use in the driver stage of an amplifier, or the output/buffer stage of a DAC or CD Player.
If you have a preamp or phonostage, you need at least Gold grade.