This type of Seimens made ECC 83 have the double getter support structure. On using in phono-stage,they sound very clear, dynamic and fascinating. I 've used them for long years and loved them. Highly Recommended Tubes!
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These tubes sound a lot like Telefunken 12AX7 but with a firmer bass and midrange. Soundstage seems to be better defined even not broken in. not as cold as stark in presentation as Telefunken these have a warmer sound but not like you would think of as warm. Mix these with Telefunken for instance use in MC or line section and vice versa with the Telefunken. I am impressed this pair was from 1963.
Verified purchase: Yes
Verified purchase: Yes
Brand new NOS Tubes at a reasonable price.
Verified purchase: Yes
5 Stars.
Verified purchase: Yes
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