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Ei tubes are made at the world famous Ei (Elektronska Industrija) factory in Niš, Yugoslavia. The factory was founded in 1951 and employed the use of Philips (Holland) technology. Back then production was mainly devoted to radio and TV tubes. Ei now specializes in the production of audio tube types and the quality of their tubes is second to none.

Ei Elites tubes take the quality a step further. All Ei Elites are tested for noise and microphonics. The pins are gold plated and they are shipped in special packaging. Try some and we think you’ll agree, EI Elites are some of the best sounding tubes being made today.

The Ei Factory is not out of commission / shut-down. They are undergoing a transition and will be producing tubes sometime in the future. All quality controls, specs and materials are being re-assessed in order to bring you a better product. More news will come as we find 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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