Military spec Sylvania 12AX7's from 1950's with long black plates, copper grid posts and square-getters. These Sylvanias are very smooth and tonally balanced throughout the frequency range. They have tight bass, clear highs and musicality all in one package. Although the label quality may vary, these all are NOS & MINT. Matched pairs available.
Quantity in Stock : 4 pcs
Price : Grade A @ US$61,00/each ; US$127,00/matched pair (Out of Stock!)
Grade B @ US$54,00/each ; US$113,00/matched pair (Out of Stock!)
Grade C @ US$34,00/each ; US$73,00/matched pair (Available!)
Grade A - The best in the stock. Lowest noise and microphony with the tightest balanced sections we have available. This is typically 10% or often tighter given the large volumes of our stock.
Grade B - Low noise and microphonics with a section balance typically between 15% and 20%, but may be higher depending on available stock.
Grade C - Lowest noise but slightly microphonic. Section balance will be similar to Grade A or B. 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.