Telefunken Diamond Bottom ECC803s

This is the most sought after 12AX7 variant in the world. The Telefunken ECC803s is a special quality – long life 12AX7 that is considered by many audiophiles the BEST 12AX7 ever made.

These ECC803s have the diamond bottom and come in a bulk container. Bulk containers were used for OEMs (Original Equipment Manufacturer). The reason they are not in individual Telefunken boxes is because tubes sold to OEMs were rarely sold that way. It was a waste of time and money for an OEM to have to open and discard hundreds of boxes when they can just pull out of a bulk container.

Every one of the ECC803s we have is from the same batch code of U9003701r

Matched pairs are available.

[Diamond Bottom]

[Bulk Container]

Price is for a Single Tube

What preamp tube testing options are available?

Sold Out

For maximum performance and longevity, vacuum tubes should always be stored and transported in a safe and secure fashion. The TubeCube and the TubeCube Pro provide a customizable shock-resistant environment for your tubes and helps prevent them from becoming microphonic or damaged.

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Telefunken Diamond Bottom ECC803s